51单片机汇编指令集(英语翻译)
单片机指令英文缩写全称
51单片机英文缩写全称MCS-51指令（1）数据传送类指令（7种助记符）助记符英文注释功能MOV Move 对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送MOVC Move Code 读取程序存储器数据表格的数据传送MOVX Move External RAM 对外部RAM的数据传送XCH Exchange 字节交换XCHD Exchange low-order Digit 低半字节交换PUSH Push onto Stack) 入栈POP Pop from Stack) 出栈（2）算术运算类指令（8种助记符）ADD Addition 加法ADDC Add with Carry 带进位加法SUBB Subtract with Borrow 带借位减法DA Decimal Adjust 十进制调整INC Increment 加1DEC Decrement 减1MUL Multiplication、Multiply 乘法DIV Division、Divide 除法(3)逻辑运算类指令（10种助记符）ANL And Logic 逻辑与ORL OR Logic 逻辑或XRL Exclusive-OR Logic 逻辑异或CLR Clear 清零CPL Complement 取反RL Rotate left 循环左移RLC Rotate Left throught the Carry flag 带进位循环左移RR Rotate Right 循环右移RRC Rotate Right throught the Carry flag 带进位循环右移SWAP Swap 低4位与高4位交换(4)控制转移类指令（17种助记符）ACALL Absolute subroutine Call 子程序绝对调用LCALL Long subroutine Call 子程序长调用RET Return from subroutine 子程序返回RETI Return from Interruption 中断返回JMP Jump IndirectSJMP Short Jump 短转移AJMP Absolute Jump 绝对转移LJMP Long Jump 长转移CJNE Compare and Jump if Not Equal 比较不相等则转移DJNZ Decrement and Jump if Not Zero 减１后不为０则转移JZ Jump if Zero 结果为０则转移JNZ Jump if Not Zero 结果不为０则转移JC Jump if the Carry flag is set 有进位则转移JNC Jump if Not Carry 无进位则转移JB Jump if the Bit is set) B位为１则转移JNB Jump if the Bit is Not set B位为０则转移JBC Jump if the Bit is set and Clear the bit 位为１则转移，并清除该位NOP No Operation 空操作（5）位操作指令（1种助记符）SETB Set Bit 置位伪指令助记符英文注释功能ORG Origin 汇编起始命令DB Define Byte 定义字节命令DW Define Word 定义字命令EQU Equal 赋值命令DATA Data 数据地址赋值命令XDATA External DataBIT Bit 位地址符号命令END End 汇编结束命令DS 定义存储空间命令不同的微机系统有不同的汇编程序，也就定义了不同的汇编命令。
51单片机汇编指令集(附记忆方法)
51 单片机汇编指令集一、数据传送类指令( 7 种助记符)MOV(英文为Move :对内部数据寄存器RAM 和特殊功能寄存器SFR 的数据进行 传送； MOV Q Move Code )读取程序存储器数据表格的数据传送； MOVX (Move External RAM) 对外部 RAM 勺数据传送； XCH (Exchange) 字节交换；XCHD (Exchange low-order Digit) 低半字节交换；PUSH (Push onto Stack) 入栈；POP (Pop from Stack) 出栈； 二、算术运算类指令( 8 种助记符) ADD(Addition) 加法；ADDC(Add with Carry) 带进位加法；SUBB(Subtract with Borrow) 带借位减法； DA(Decimal Adjust) 十进制调整； INC(Increment) 加 1； DEC(Decrement) 减 1；MUL(Multiplication 、Multiply) 乘法；DIV(Division 、Divide) 除法； 三、逻辑运算类指令( 10 种助记符) ANL(AND Logic) 逻辑与；ORL(OR Logic) 逻辑或；XRL(Exclusive-OR Logic) 逻辑异或； CLR(Clear) 清零；CPL(Complement) 取反；RL(Rotate left) 循环左移；RLC(Rotate Left throught the Carry flag) RR(Rotate Right) 循环右移；RRC (Rotate Right throught the Carry flag)SWAP (Swap) 低 4 位与高 4 位交换； 四、控制转移类指令( 17 种助记符)ACALL ( Absolute subroutine Call )子程序绝对调用； LCALL ( Long subroutine Call )子程序长调用； RET ( Return from subroutine )子程序返回； RETI ( Return from Interruption )中断返回； SJMP ( Short Jump )短转移；AJMP ( Absolute Jump )绝对转移； LJMP( Long Jump )长转移；CJNE (Compare Jump if Not Equal) 比较不相等则转移；DJNZ (Decreme nt Jump if Not Zero) 减1后不为0则转移； JZ (Jump if Zero) 结果为0则转移；JNZ (Jump if Not Zero) 结果不为0则转移； JC (Jump if the Carry flag is set) 有进位则转移； JNC (Jump if Not Carry) 无进位则转移； JB (Jump if the Bit is set) 位为1则转移； JNB (Jump if the Bit is Not set) 位为0则转移；带进位循环左移；带进位循环右移；JBC(Jump if the Bit is set and Clear the bit) 位为1则转移，并清除该位；NOP (No Operation) 空操作；五、位操作指令( 1 种助记符)CLR 位清零；SETB(Set Bit) 位置1 。
完整word版,51单片机英文及其翻译
英文翻译原文：51 Microcontroller IntroductionMicrocontrollers basic component is a central processing unit (CPU in the computing device and controller), read-only memory (usually expressed as a ROM), read-write memory (also known as Random Access Memory MRAM is usually expressed as a RAM) , input / output port (also divided into parallel port and serial port, expressed as I / O port), and so composed. In fact there is also a clock circuit microcontroller, so that during operation and control of the microcontroller, can rhythmic manner. In addition, there are so-called "break system", the system is a "janitor" role, when the microcontroller control object parameters that need to be intervention to reach a particular state, can after this "janitor" communicated to the CPU, so that CPU priorities of the external events to take appropriate counter-measures.Microcontrollers are used in a multitude of commercial applications such as modems, motor-control systems, air conditioner control systems, automotive engine and among others. The high processing speed and enhanced peripheral set of these microcontrollers make them suitable for such high-speed event-based applications. However, these critical application domains also require that these microcontrollers are highly reliable. The high reliability and low market risks can be ensured by a robust testing process and a proper tools environment for the validation of these microcontrollers both at the component and at the system level. Intel Platform Engineering department developed an object-oriented multi-threaded test environment for the validation of its AT89C51 automotive microcontrollers. The goals of this environment was not only to provide a robust testing environment for the AT89C51 automotive microcontrollers, but to develop an environment which can be easily extended and reused for the validation of several other future microcontrollers. The environment was developed in conjunction with Microsoft Foundation Classes (AT89C51). The paper describes the design and mechanism of this test environment, its interactions with various hardware/software environmental components, and how to use AT89C51.Are 8-bit microcontroller early or 4 bits. One of the most successful is the INTEL 8031, for a simple, reliable and good performance was a lot of praise. Then developed in 8031 out of MCS51 MCU Systems. SCM systems based on this system until now is still widely used. With the increased requirements of industrial control field, began a 16-bit microcontroller, but not ideal because the cost has not been very widely used. After 90 years with the great development of consumer electronics, microcontroller technology has been a huge increase. With INTEL i960 series, especially the later series of widely used ARM, 32-bit microcontroller quickly replace high-end 16-bit MCU status and enter the mainstream market. The traditional 8-bit microcontroller performance have been therapid increase capacity increase compared to 80 the number of times. Currently, high-end 32-bit microcontroller clocked over 300MHz, the performance catching the mid-90s dedicated processor, while the average model prices fall to one U.S. dollar, the most high-end model is only 10 dollars. Modern SCM systems are no longer only in the development and use of bare metal environment, a large number of proprietary embedded operating system is widely used in the full range of SCM. The handheld computers and cell phones as the core processing of high-end microcontroller can even use a dedicated Windows and Linux operating systems.SCM relies on the program, and can be modified. Through different procedures to achieve different functions, in particular special unique features, this is another device much effort needs to be done, some are great efforts are very difficult to achieve. A not very complex functions if the 50's with the United States developed 74 series, or the 60's CD4000 series of these pure hardware buttoned, then the circuit must be a large PCB board! But if the United States if the 70's with a series of successful SCM market, the result will be a drastic change! Just because you are prepared by microcomputer programs can achieve high intelligence, high efficiency and high reliability!IntroductionThe 8-bit AT89C51 CHMOS microcontrollers are designed to handle high-speed calculations and fast input/output operations. MCS 51 microcontrollers are typically used for high-speed event control systems. Commercial applications include modems, motor-control systems, printers, photocopiers, air conditioner control systems, disk drives, and medical instruments. The automotive industry use MCS 51 microcontrollers in engine-control systems, airbags, suspension systems, and antilock braking systems (ABS). The AT89C51 is especially well suited to applications that benefit from its processing speed and enhanced on-chip peripheral functions set, such as automotive power-train control, vehicle dynamic suspension, antilock braking, and stability control applications. Because of these critical applications, the market requires a reliable cost-effective controller with a low interrupt latency response, ability to service the high number of time and event driven integrated peripherals needed in real time applications, and a CPU with above average processing power in a single package. The financial and legal risk of having devices that operate unpredictably is very high. Once in the market, particularly in mission critical applications such as an autopilot or anti-lock braking system, mistakes are financiallyProhibitive. Redesign costs can run as high as a $500K, much more if the fix means back annotating it across a product family that share the same core and/or peripheral design flaw. In addition, field replacements of components are extremely expensive, as the devices are typically sealed in modules with a total value several times that of the component. To mitigate these problems, it is essential that comprehensive testing of the controllers be carried out at both the component level and system level under worst case environmental and voltage conditions. This complete and thorough validation necessitates not only a well-defined process but also a proper environment and tools to facilitate and execute the mission successfully.Intel Chandler Platform Engineering group provides postSilicon system validation (SV) of various micro-controllers and processors. The system validation process can be broken into three major parts. The type of the device and its application requirements determine which types of testing are performed on the device.The AT89C51 provides the following standard features: 4Kbytes of flash, 128 bytes of RAM, 32 I/O lines, two 16-bittimer/counters, five vector two-level interrupt architecture, a full duple ser -ail port, on-chip oscillator and clock circuitry. In addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt sys -tem to continue functioning. The Power-down Mode saves the RAM contents but freezes the social -labor disabling all other chip functions until the next hardware reset.Pin DescriptionVCC Supply voltage.GND Ground.Port 0Port 0 is an 8-bit open-drain bi-directional I/O port. As an output port, each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as high impedance inputs.Port 0 may also be configured to be the multiplexed lowered address/data bus during accesses to external program and data memory. In this mode P0 has internal pull-ups’.Port 0 also receives the code bytes during Flash programming, and outputs the code bytes during program verification. External pull-ups are required during program verification.Port 1Port 1 is an 8-bit bi-directional I/O port with internal pullups.The Port 1 output buffers can sink/so -urge four TTL inputs. When 1s are written to Port 1 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 1 also receives the low-order address bytes during Flash programming and verification.Port 2Port 2 is an 8-bit bi-directional I/O port with internal pullups.The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 2 emits the high-order address byte during fetches from external program memory and during accesses to Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 2 emits the high-order address byte during fetches from external program memory and during accesses to external data memory that uses 16-bit addresses (MOVX @DPTR). In this application, it uses strong internal pull-ups when emitting 1s. During accesses to external data memory that uses 8-bit addresses (MOVX @ RI); Port 2 emits the contents of the P2 Special Function Register.Port 2 also receives the high-order address bits and some control signals during Flash programming and verification.Port 3Port 3 is an 8-bit bi-directional I/O port with internal pullups.The Port 3 output buffers can sink/soul -race four TTL inputs. When 1s are written to Port 3 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (IIL) because of the pull-ups.RSTReset input. A high on this pin for two machine cycles while the oscillator is running resets the device.ALE/PROGAddress Latch Enable output pulse for latching the low byte of the address during accesses to external memory.This pin is also the program pulse input (PROG) during Flash programming.In normal operation ALE is emitted at a constant rate of 1/6 the oscillator frequency, and may be used for external timing or clocking purposes. Note, however, that one ALE pulse is skipped dui -nag each access to external DataMemory.If desired, ALE operation can be disabled by setting bit 0 of SFR location 8EH. With the bit set, ALE is active only during a MOVX or MOVC instruction. Otherwise, the pin is weakly pulled high. Setting the ALE-disable bit has no effect if the microcontroller is in external execution mode.PSENProgram Store Enable is the read strobe to external program memory. When the AT89C51 is executing code from external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory.EA/VPPExternal Access Enable. EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. Note, however, that if lock bit 1 is programmed, EA will be internally latched on reset. A should be strapped to VCC for internal program executions. This pin also receives the 12-volt programming enable voltage (VPP) during Flash programming, for parts that require 12-volt VPP.The AT89C51 code memory array is programmed byte-by byte in either programming mode. To program any nonblank byte in the on-chip Flash Memory, the entire memory must be erased using the Chip Erase Mode.Data Polling: The AT89C51 features Data Polling to indicate the end of a write cycle. During a write cycle, an attempted read of the last byte written will result in the complement of the written datum on PO.7. Once the write cycle has been completed, true data are valid on all outputs, andThe next cycle may begin. Data Polling may begin any time after a write cycle has been initiated.Ready/Busy: The progress of byte programming can also be monitored by the RDY/BSY output signal. P3.4 is pulled low after ALE goes high during programming to indicate BUSY. P3.4 is pulled high again when programming is done to indicate READY.Program Verify: If lock bits LB1 and LB2 have not been programmed, the programmed code data can be read back via the address and data lines for verification. The lock bits cannot be verified directly. Verification of the lock bits is achieved byobserving that their features are enabled.A microcomputer interface converts information between two forms. Outside the microcomputer the information handled by an electronic system exists as a physical signal, but within the program, it is represented numerically. The function of any interface can be broken down into a number of operations which modify the data in some way, so that the process of conversion between the external and internal forms is carried out in a number of steps.An analog-to-digital converter (ADC) is used to convert a continuously variable signal to a corresponding digital form which can take any one of a fixed number of possible binary values. If the output of the transducer does not vary continuously, no ADC is necessary. In this case the signal conditioning section must convert the incoming signal to a form which can be connected directly to the next part of the interface, the input/output section of the microcomputer itself.Output interfaces take a similar form, the obvious difference being that here the flow of information is in the opposite direction; it is passed from the program to the outside world. In this case the program may call an output subroutine which supervises the operation of the interface and performs the scaling numbers which may be needed for a digital-to-analog converter (DAC). This subroutine passes information in turn to an output device which produces a corresponding electrical signal, which could be converted into analog form using a DAC. Finally the signal is conditioned (usually amplified) to a form suitable for operating an actuator.The signals used within microcomputer circuits are almost always too small to be connected directly to the “outside world” and some kind of interface must be used to translate them to a more appropriate form. The design of section of interface circuits is one of the most important tasks facing the engineer wishing to apply microcomputers. We have seen that in microcomputers information is represented as discrete patterns of bits; this digital form is most useful when the microcomputer is to be connected to equipment which can only be switched on or off, where each bit might represent the state of a switch or actuator.To solve real-world problems, a microcontroller must have more than just a CPU, a program, and a data memory. In addition, it must contain hardware allowing the CPU to access information from the outside world. Once the CPU gathers information and processes the data, it must also be able to effect change on some portion of the outside world. T hese hardware devices, called peripherals, are the CPU’s window t o the outside.The most basic form of peripheral available on microcontrollers is the general purpose I70 port. Each of the I/O pins can be used as either an input or an output. The function of each pin is determined by setting or clearing corresponding bits in a corresponding data direction register during the initialization stage of a program. Each output pin may be driven to either a logic one or a logic zero by using CPU instructions to pin may be viewed (or read.) by the CPU using program instructions.Some type of serial unit is included on microcontrollers to allow the CPU to communicate bit-serially with external devices. Using a bit serial format instead of bit-parallel format requires fewer I/O pins to perform the communication function, which makes it less expensive, but slower. Serial transmissions are performed either synchronously or asynchronously.Its applicationsSCM is widely used in instruments and meters, household appliances, medical equipment, aerospace, specialized equipment, intelligent management and process control fields, roughly divided into the following several areas:SCM has a small size, low power consumption, controlling function, expansion flexibility, the advantages of miniaturization and ease of use, widely used instrument, combining different types of sensors can be realized, such as voltage, power, frequency, humidity, temperature, flow, speed, thickness, angle, length, hardness, elemental, physical pressure measurement. SCM makes use of digital instruments, intelligence, miniaturization, and functionality than the use of more powerful electronic or digital circuits. Such as precision measuring equipment (power meter, oscilloscope, various analytical instrument).译文：51单片机简介单片机的基本组成是由中央处理器（即CPU中的运算器和控制器）、只读存贮器（通常表示为ROM）、读写存贮器（又称随机存贮器通常表示为RAM）、输入/输出口（又分为并行口和串行口，表示为I/O口）等等组成。
MCS-51单片机汇编指令操作码助记符和英文全称对照
直接寻址方式访问以下三种存储空间：
1．特殊功能寄存器（只能用直接寻址方式访问）。
2．内部RAM的低128字节（对于8032/8052等单片机，其内部高128字节RAM（80H~0FFH）不能用直接寻址方式访问，而只能用寄存器间接寻址方式访问）。
3．位地址空间。
寄存器间接寻址方式是由指令指出某一个寄存器的内容作为操作数的地址。
（寄存器的内容不是操作数，而是操作数所在的存储器地址。
）
寄存器间接寻址使用当前工作寄存器区中R0或R1作地址指针（堆栈操作指令用栈指针SP）来寻址内部RAM（00H~0FFH）。
寄存器间接寻址也适用于访问外部扩展的数据存储器，用R0、R1或DPTR作为地址指针。
寄存器间接寻址用符号@表示。
相对寻址相对寻址方式以PC的内容作为基地址，加上指令中给定的偏移量，所得结果送PC寄存器作为转移地址。
应注意偏移量是有符号数，在-128~+127之间。
寻址方式及相关的存储空间
特殊功能寄存器只能采用直接寻址，而内部RAM高128字节只能采用寄存器间接寻址。
目的操作数不能采用立即寻址，@Ri中的i范围为0和1，@Rn中的n范围为0~7，每条指令中最多只能有1个Rn或者@Ri。
下面的都是错的：
MOV #30H ，40H
MOV A ，@R2。
(整理)单片机指令英文全称.
51单片机汇编指令集（指令集带英文翻译）一、数据传送类指令（7种助记符）MOV（英文为Move）：对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送；MOVC（Move Code）读取程序存储器数据表格的数据传送；MOVX(Move External RAM)对外部RAM的数据传送；XCH(Exchange)字节交换；XCHD(Exchange low-order Digit)低半字节交换；PUSH(Push onto Stack)入栈；POP (Pop from Stack)出栈；二、算术运算类指令（8种助记符）ADD(Addition) 加法；ADDC(Add with Carry) 带进位加法；SUBB(Subtract with Borrow) 带借位减法；DA(Decimal Adjust) 十进制调整；INC(Increment) 加1；DEC(Decrement) 减1；MUL(Multiplication、Multiply) 乘法；DIV(Division、Divide) 除法；三、逻辑运算类指令（10种助记符）ANL(AND Logic) 逻辑与；ORL(OR Logic) 逻辑或；XRL(Exclusive-OR Logic) 逻辑异或；CLR(Clear) 清零；CPL(Complement) 取反；RL(Rotate left) 循环左移；RLC(Rotate Left throught the Carry flag) 带进位循环左移；RR(Rotate Right) 循环右移；RRC(Rotate Right throught the Carry flag) 带进位循环右移；SWAP (Swap)低4位与高4位交换；四、控制转移类指令（17种助记符）ACALL（Absolute subroutine Call）子程序绝对调用；LCALL（Long subroutine Call）子程序长调用；RET（Return from subroutine）子程序返回；RETI（Return from Interruption）中断返回；SJMP（Short Jump）短转移；AJMP（Absolute Jump）绝对转移；LJMP（Long Jump）长转移；CJNE (Compare Jump if Not Equal)比较不相等则转移；DJNZ (Decrement Jump if Not Zero)减１后不为０则转移；JZ (Jump if Zero)结果为０则转移；JNZ (Jump if Not Zero) 结果不为０则转移；JC (Jump if the Carry flag is set)有进位则转移；JNC (Jump if Not Carry)无进位则转移；JB (Jump if the Bit is set)位为１则转移；JNB (Jump if the Bit is Not set) 位为０则转移；JBC(Jump if the Bit is set and Clear the bit) 位为１则转移，并清除该位；NOP (No Operation)空操作；五、位操作指令（1种助记符）CLR 位清零；SETB(Set Bit)位置１。
51单片机常用汇编语言助记符英文全称
51单片机常用汇编语言助记符英文全称(1)数据传送类指令（7种助记符）MOV（英文为Move）：对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送；MOVC（Move Code）读取程序存储器数据表格的数据传送；MOVX (Move External RAM) 对外部RAM的数据传送；XCH (Exchange) 字节交换；XCHD (Exchange low-order Digit) 低半字节交换；PUSH (Push onto Stack) 入栈；POP (Pop from Stack) 出栈；（2）算术运算类指令（8种助记符）ADD(Addition) 加法；ADDC(Add with Carry) 带进位加法；SUBB(Subtract with Borrow) 带借位减法；DA(Decimal Adjust) 十进制调整；INC(Increment) 加1；DEC(Decrement) 减1；MUL(Multiplication、Multiply) 乘法；DIV(Division、Divide) 除法；(3)逻辑运算类指令（10种助记符）ANL(AND Logic) 逻辑与；XRL(Exclusive-OR Logic) 逻辑异或；CLR(Clear) 清零；CPL(Complement) 取反；RL(Rotate left) 循环左移；RLC(Rotate Left throught the Carry flag) 带进位循环左移；RR(Rotate Right) 循环右移；RRC (Rotate Right throught the Carry flag) 带进位循环右移；SWAP (Swap) 低4位与高4位交换；（4）控制转移类指令（17种助记符）ACALL（Absolute subroutine Call）子程序绝对调用；LCALL（Long subroutine Call）子程序长调用；RET（Return from subroutine）子程序返回；RETI（Return from Interruption）中断返回；SJMP（Short Jump）短转移；LJMP长转移；AJMP（Absolute Jump）绝对转移；CJNE (Compare Jump if Not Equal)比较不相等则转移；DJNZ (Decrement Jump if Not Zero)减１后不为０则转移；JZ (Jump if Zero)结果为０则转移；JNZ (Jump if Not Zero) 结果不为０则转移；JC (Jump if the Carry flag is set)有进位则转移；JNC (Jump if Not Carry)无进位则转移；JB (Jump if the Bit is set)位为１则转移；JNB (Jump if the Bit is Not set) 位为０则转移；JBC(Jump if the Bit is set and Clear the bit) 位为１则转移，并清除该位；NOP (No Operation) 空操作；（5）位操作指令（1种助记符）SETB(Set Bit) 位置１。
51单片机英文及其翻译
英文翻译原文：51 Microcontroller IntroductionMicrocontrollers basic component is a central processing unit (CPU in the computing device and controller), read-only memory (usually expressed as a ROM), read-write memory (also known as Random Access Memory MRAM is usually expressed as a RAM) , input / output port (also divided into parallel port and serial port, expressed as I / O port), and so composed. In fact there is also a clock circuit microcontroller, so that during operation and control of the microcontroller, can rhythmic manner. In addition, there are so-called "break system", the system is a "janitor" role, when the microcontroller control object parameters that need to be intervention to reach a particular state, can after this "janitor" communicated to the CPU, so that CPU priorities of the external events to take appropriate counter-measures.Microcontrollers are used in a multitude of commercial applications such as modems, motor-control systems, air conditioner control systems, automotive engine and among others. The high processing speed and enhanced peripheral set of these microcontrollers make them suitable for such high-speed event-based applications. However, these critical application domains also require that these microcontrollers are highly reliable. The high reliability and low market risks can be ensured by a robust testing process and a proper tools environment for the validation of these microcontrollers both at the component and at the system level. Intel Platform Engineering department developed an object-oriented multi-threaded test environment for the validation of its AT89C51 automotive microcontrollers. The goals of this environment was not only to provide a robust testing environment for the AT89C51 automotive microcontrollers, but to develop an environment which can be easily extended and reused for the validation of several other future microcontrollers. The environment was developed in conjunction with Microsoft Foundation Classes (AT89C51). The paper describes the design and mechanism of this test environment, its interactions with various hardware/software environmental components, and how to use AT89C51.Are 8-bit microcontroller early or 4 bits. One of the most successful is the INTEL 8031, for a simple, reliable and good performance was a lot of praise. Then developed in 8031 out of MCS51 MCU Systems. SCM systems based on this system until now is still widely used. With the increased requirements of industrial control field, began a 16-bit microcontroller, but not ideal because the cost has not been very widely used. After 90 years with the great development of consumer electronics, microcontroller technology has been a huge increase. With INTEL i960 series, especially the later series of widely used ARM, 32-bit microcontroller quickly replace high-end 16-bit MCU status and enter the mainstream market. The traditional 8-bit microcontroller performance have been therapid increase capacity increase compared to 80 the number of times. Currently, high-end 32-bit microcontroller clocked over 300MHz, the performance catching the mid-90s dedicated processor, while the average model prices fall to one U.S. dollar, the most high-end model is only 10 dollars. Modern SCM systems are no longer only in the development and use of bare metal environment, a large number of proprietary embedded operating system is widely used in the full range of SCM. The handheld computers and cell phones as the core processing of high-end microcontroller can even use a dedicated Windows and Linux operating systems.SCM relies on the program, and can be modified. Through different procedures to achieve different functions, in particular special unique features, this is another device much effort needs to be done, some are great efforts are very difficult to achieve. A not very complex functions if the 50's with the United States developed 74 series, or the 60's CD4000 series of these pure hardware buttoned, then the circuit must be a large PCB board! But if the United States if the 70's with a series of successful SCM market, the result will be a drastic change! Just because you are prepared by microcomputer programs can achieve high intelligence, high efficiency and high reliability!IntroductionThe 8-bit AT89C51 CHMOS microcontrollers are designed to handle high-speed calculations and fast input/output operations. MCS 51 microcontrollers are typically used for high-speed event control systems. Commercial applications include modems, motor-control systems, printers, photocopiers, air conditioner control systems, disk drives, and medical instruments. The automotive industry use MCS 51 microcontrollers in engine-control systems, airbags, suspension systems, and antilock braking systems (ABS). The AT89C51 is especially well suited to applications that benefit from its processing speed and enhanced on-chip peripheral functions set, such as automotive power-train control, vehicle dynamic suspension, antilock braking, and stability control applications. Because of these critical applications, the market requires a reliable cost-effective controller with a low interrupt latency response, ability to service the high number of time and event driven integrated peripherals needed in real time applications, and a CPU with above average processing power in a single package. The financial and legal risk of having devices that operate unpredictably is very high. Once in the market, particularly in mission critical applications such as an autopilot or anti-lock braking system, mistakes are financiallyProhibitive. Redesign costs can run as high as a $500K, much more if the fix means back annotating it across a product family that share the same core and/or peripheral design flaw. In addition, field replacements of components are extremely expensive, as the devices are typically sealed in modules with a total value several times that of the component. To mitigate these problems, it is essential that comprehensive testing of the controllers be carried out at both the component level and system level under worst case environmental and voltage conditions. This complete and thorough validation necessitates not only a well-defined process but also a proper environment and tools to facilitate and execute the mission successfully.Intel Chandler Platform Engineering group provides postSilicon system validation (SV) of various micro-controllers and processors. The system validation process can be broken into three major parts. The type of the device and its application requirements determine which types of testing are performed on the device.The AT89C51 provides the following standard features: 4Kbytes of flash, 128 bytes of RAM, 32 I/O lines, two 16-bittimer/counters, five vector two-level interrupt architecture, a full duple ser -ail port, on-chip oscillator and clock circuitry. In addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt sys -tem to continue functioning. The Power-down Mode saves the RAM contents but freezes the social -labor disabling all other chip functions until the next hardware reset.Pin DescriptionVCC Supply voltage.GND Ground.Port 0Port 0 is an 8-bit open-drain bi-directional I/O port. As an output port, each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as high impedance inputs.Port 0 may also be configured to be the multiplexed lowered address/data bus during accesses to external program and data memory. In this mode P0 has internal pull-ups’.Port 0 also receives the code bytes during Flash programming, and outputs the code bytes during program verification. External pull-ups are required during program verification.Port 1Port 1 is an 8-bit bi-directional I/O port with internal pullups.The Port 1 output buffers can sink/so -urge four TTL inputs. When 1s are written to Port 1 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 1 also receives the low-order address bytes during Flash programming and verification.Port 2Port 2 is an 8-bit bi-directional I/O port with internal pullups.The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 2 emits the high-order address byte during fetches from external program memory and during accesses to Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 2 emits the high-order address byte during fetches from external program memory and during accesses to external data memory that uses 16-bit addresses (MOVX @DPTR). In this application, it uses strong internal pull-ups when emitting 1s. During accesses to external data memory that uses 8-bit addresses (MOVX @ RI); Port 2 emits the contents of the P2 Special Function Register.Port 2 also receives the high-order address bits and some control signals during Flash programming and verification.Port 3Port 3 is an 8-bit bi-directional I/O port with internal pullups.The Port 3 output buffers can sink/soul -race four TTL inputs. When 1s are written to Port 3 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (IIL) because of the pull-ups.RSTReset input. A high on this pin for two machine cycles while the oscillator is running resets the device.ALE/PROGAddress Latch Enable output pulse for latching the low byte of the address during accesses to external memory.This pin is also the program pulse input (PROG) during Flash programming.In normal operation ALE is emitted at a constant rate of 1/6 the oscillator frequency, and may be used for external timing or clocking purposes. Note, however, that one ALE pulse is skipped dui -nag each access to external DataMemory.If desired, ALE operation can be disabled by setting bit 0 of SFR location 8EH. With the bit set, ALE is active only during a MOVX or MOVC instruction. Otherwise, the pin is weakly pulled high. Setting the ALE-disable bit has no effect if the microcontroller is in external execution mode.PSENProgram Store Enable is the read strobe to external program memory. When the AT89C51 is executing code from external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory.EA/VPPExternal Access Enable. EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. Note, however, that if lock bit 1 is programmed, EA will be internally latched on reset. A should be strapped to VCC for internal program executions. This pin also receives the 12-volt programming enable voltage (VPP) during Flash programming, for parts that require 12-volt VPP.The AT89C51 code memory array is programmed byte-by byte in either programming mode. To program any nonblank byte in the on-chip Flash Memory, the entire memory must be erased using the Chip Erase Mode.Data Polling: The AT89C51 features Data Polling to indicate the end of a write cycle. During a write cycle, an attempted read of the last byte written will result in the complement of the written datum on PO.7. Once the write cycle has been completed, true data are valid on all outputs, andThe next cycle may begin. Data Polling may begin any time after a write cycle has been initiated.Ready/Busy: The progress of byte programming can also be monitored by the RDY/BSY output signal. P3.4 is pulled low after ALE goes high during programming to indicate BUSY. P3.4 is pulled high again when programming is done to indicate READY.Program Verify: If lock bits LB1 and LB2 have not been programmed, the programmed code data can be read back via the address and data lines for verification. The lock bits cannot be verified directly. Verification of the lock bits is achieved byobserving that their features are enabled.A microcomputer interface converts information between two forms. Outside the microcomputer the information handled by an electronic system exists as a physical signal, but within the program, it is represented numerically. The function of any interface can be broken down into a number of operations which modify the data in some way, so that the process of conversion between the external and internal forms is carried out in a number of steps.An analog-to-digital converter (ADC) is used to convert a continuously variable signal to a corresponding digital form which can take any one of a fixed number of possible binary values. If the output of the transducer does not vary continuously, no ADC is necessary. In this case the signal conditioning section must convert the incoming signal to a form which can be connected directly to the next part of the interface, the input/output section of the microcomputer itself.Output interfaces take a similar form, the obvious difference being that here the flow of information is in the opposite direction; it is passed from the program to the outside world. In this case the program may call an output subroutine which supervises the operation of the interface and performs the scaling numbers which may be needed for a digital-to-analog converter (DAC). This subroutine passes information in turn to an output device which produces a corresponding electrical signal, which could be converted into analog form using a DAC. Finally the signal is conditioned (usually amplified) to a form suitable for operating an actuator.The signals used within microcomputer circuits are almost always too small to be connected directly to the “outside world” and some kind of interface must be used to translate them to a more appropriate form. The design of section of interface circuits is one of the most important tasks facing the engineer wishing to apply microcomputers. We have seen that in microcomputers information is represented as discrete patterns of bits; this digital form is most useful when the microcomputer is to be connected to equipment which can only be switched on or off, where each bit might represent the state of a switch or actuator.To solve real-world problems, a microcontroller must have more than just a CPU, a program, and a data memory. In addition, it must contain hardware allowing the CPU to access information from the outside world. Once the CPU gathers information and processes the data, it must also be able to effect change on some portion of the outside world. T hese hardware devices, called peripherals, are the CPU’s window t o the outside.The most basic form of peripheral available on microcontrollers is the general purpose I70 port. Each of the I/O pins can be used as either an input or an output. The function of each pin is determined by setting or clearing corresponding bits in a corresponding data direction register during the initialization stage of a program. Each output pin may be driven to either a logic one or a logic zero by using CPU instructions to pin may be viewed (or read.) by the CPU using program instructions.Some type of serial unit is included on microcontrollers to allow the CPU to communicate bit-serially with external devices. Using a bit serial format instead of bit-parallel format requires fewer I/O pins to perform the communication function, which makes it less expensive, but slower. Serial transmissions are performed either synchronously or asynchronously.Its applicationsSCM is widely used in instruments and meters, household appliances, medical equipment, aerospace, specialized equipment, intelligent management and process control fields, roughly divided into the following several areas:SCM has a small size, low power consumption, controlling function, expansion flexibility, the advantages of miniaturization and ease of use, widely used instrument, combining different types of sensors can be realized, such as voltage, power, frequency, humidity, temperature, flow, speed, thickness, angle, length, hardness, elemental, physical pressure measurement. SCM makes use of digital instruments, intelligence, miniaturization, and functionality than the use of more powerful electronic or digital circuits. Such as precision measuring equipment (power meter, oscilloscope, various analytical instrument).译文：51单片机简介单片机的基本组成是由中央处理器（即CPU中的运算器和控制器）、只读存贮器（通常表示为ROM）、读写存贮器（又称随机存贮器通常表示为RAM）、输入/输出口（又分为并行口和串行口，表示为I/O口）等等组成。
51单片机缩写的英文全称及中文名称
单片机缩写的英文全称及中文名称PC = programmer counter //程序计数器counter 计算器, 计数器, 计算者, 柜台, 筹码['kauntə]ACC = accumulate [ə'kju:mjuleit //累加器: 积累: 积聚PSW = programmer status word //程序状态字status'steitəs, 'stæ-]n. 地位；状态；情形；重要身分SP = stack point //堆栈指针stack[stæk n. 堆；堆叠vt. 使堆叠；把…堆积起来vi. 堆积，堆叠DPTR = data point register //数据指针寄存器'redʒistə寄存器IP = interrupt priority //中断优先级[,intə'rʌpt 中断[prai'ɔrəti] 优先；优先权；[数] 优先次序；优先考虑的事IE = interrupt enable // 中断使能i'neibl]使能够，使成为可能；授予权利或方法TMOD = timer mode // 定时器方式(定时器/计数器控制寄存器) ['taimə定时器，计时器mode [məud模式，方式ALE = alter (变更,可能是)['ɔ:ltə]PSEN = programmer saving enable //程序存储器使能(选择外部程序存储器的意思) EA = enable all(允许所有中断)完整应该是enable all interruptPROG = programme (程序)SFR = special funtion register //特殊功能寄存器TCON = timer control //定时器控制PCON = power control //电源控制MSB = most significant bit//最高有效位[sig'nifikənt有效的；有意义的LSB = last significant bit//最低有效位CY = carry //进位（标志）['kæri]AC = assistant carry //辅助进位[ə'sistənt n. 助手，助理，助教adj. 辅助的，助理的；有帮助的OV = overflow //溢出[,əuvə'fləu, 'əuvəfləu ORG = originally[ə'ridʒənəli //起始来源DB = define [di'fain]定义byte [bait] //字节定义EQU = equal //等于['i:kwəl]DW = define word //字定义 E = enable //使能OE = output enable //输出使能RD = read //读WR = write //写中断部分：INT0 = interrupt 0 //中断0 INT1 = interrupt 1//中断1T0 = timer 0 //定时器0 T1 = timer 1 //定时器1TF1 = timer1 flag //定时器1 标志(其实是定时器1中断标志位) [flæɡvi. 标记；衰退；枯萎vt. 标记；插旗n. 标志；旗子IE1 = interrupt exterior //(外部中断请求,可能是) ik'stiəriə]外部的IT1 = interrupt touch //(外部中断触发方式,可能是)ES = enable serial //串行使能['siəriəl, 'si:r- adj. 连续的；连载的；分期偿还的n. 电视连续剧；[图情] 期刊；连载小说serial communication [计]串行通信serial port [计]串行端口；序列埠serial interface [计]串联接口ET = enable timer //定时器使能PS = priority serial //串口优先级EX = enable exterior //外部使能(中断)[ik'stiəriə] adj. 外部的；表面的；外在的n. 外部；表面；外型；外貌PX = priority exterior //外部中断优先级PT = priority timer //定时器优先级寄存器部分:SFR:special funtion register //特殊功能寄存器(片内RAM 80H~FFH)ACC:accumulate //累加器SP:stack point //堆栈指针PSW:programmer status word //程序状态字IE:interrupt enable // 中断使能DPL,DPH:DPTR(data point register //数据指针寄存器)的低8位和高8位IP:interrupt priority //中断优先级PCON:power control //电源控制SCON:serial control //串行口控制TCON:timer control //定时器控制SBUF:serial buffer //串行数据缓冲['bʌfə] n. [计] 缓冲区；缓冲器，[车辆] 减震器vt. 缓冲TMOD:timer mode //定时器方式PSW:CY:carry (psw.7) //进位（标志）AC:auxiliary carry (psw.6) //辅助进位F0: (psw.5) //用户自定义标志位OV:overflow (psw.2) //溢出RS1,RS0:register select (psw.4,psw.3)//工作寄存器组选择位[si'lekt]挑选P:parity (psw.0) //奇偶校验位['pæriti. 平价；同等；相等IE:EA:Enable All Interrupt /CPU开/关中断控制位ET1:Enable Timer //定时器2溢出中断允许位ES:Enable Serial Port //串行口中断允许位EX:Enable External //外部中断1的中断允许位IP:PS:Priority Serial //串口优先级PT:Priority Timer //定时器优先级PX:Priority External //外部中断优先级[ik'stə:nəl] adj. 外部的；表面的；[药] 外用的；外国的；外面的n. 外部；外观；外面SCON:RI:Receive Interrupt //串行口接收中断请求标志位TI:Transmit Interrupt //串行口发送中断请求标志位[trænz'mit, træns-, trɑ:n-] vt. 传输；传播；发射；传达；遗传vi. 传输；发射信号TCON:TF1:Timer1 Overflow Flag //定时器1溢出中断请求标志TR1:Timer1 Run //定时器1启动控制位IE1:Interrupt Edge //外部中断1请求标志位[edʒ]IT1:Interrupt Type //外部中断1触发方式选择位8051引脚:RST:RESET (9)//复位，重启P3:RXD:Received eXchange [iks'tʃeindʒ Data (10,p3.0)//接收串行数据eXchange n. 交换；交流；交易所；兑换vt. 交换；交易；兑换vi. 交换；交易；兑换TXD:Transmit eXchange Data (11,p3.1)//发送串行数据INT0:interrupt 0 (12,p3.2)//中断0 INT1:interrupt 1 (13,p3.3)//中断1T0:timer 0 (14,p3.4)//定时器0 T1:timer 1 (15,p3.5)//定时器1RD：ReaD (16,p3.6)//外部数据存储器(RAM)的读信号WR：WRite (17,p3.7)//外部数据存储器(RAM)的写信号XTAL2,XTAL1:External Crystal ['kristəl晶体Oscillator ['ɔsileitə振荡器(18,19) //外部晶体振荡器PSEN:Program Store [stɔ:]Enable (29) //程序存储器(ROM)使能n. 商店；储备，贮藏；仓库vt. 贮藏，储存ALE:Address Latch Enable (30) //地址锁存Latch锁存器EA：External Address Enable (31) //外部程序存储器(ROM)地址允许其它：OE:output enable //输出使能MSB = most significant bit//最高有效位[sig'nifikənt] adj. 重大的；有效的；有意义的；值得注意的；意味深长的n. 象征；有意义的事物LSB = last significant bit//最低有效位DB = define byte //字节定义ORG = originally //起始来源EQU = equal //等于DW = define word //字定义CLKOUT：Clock out,时钟输出BUSWDITH：总线宽度Vref：参考电压（带ADC的单片机中有的）参考电压（Voltage Reference）['refərəns n. 参考，参照；HSO：High Speed Output，高速输出HSI：High Speed Input：高速输入INST：Instruction，指令READY就绪，总线中的就绪信号或引脚NMI：No Mask Interruput （Input）：不可屏蔽的中断请求（输入）[mɑ:sk, mæskBHE：Bank High Enable：存储器的高位允许，如在80286系统中RAM的组织为16位的，分为高8位和低8位数据，分别的控制信号为BHE和BLE Bank n. 银行；岸；浅滩；储库vt. 将…存入银行；倾斜转弯vi. 堆积；倾斜转弯MCS-51指令（1）数据传送类指令（7种助记符）助记符英文注释功能MOV Move 对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送MOVC Move Code 读取程序存储器数据表格的数据传送MOVX Move External RAM 对外部RAM的数据传送XCH Exchange 字节交换XCHD Exchange low-order Digit ['didʒit]低半字节交换POP Pop from Stack) 出栈PUSH Push onto ['ɔntu, -tə] Stack) 入栈（2）算术运算类指令（8种助记符）ADD Addition 加法ADDC Add with Carry 带进位加法SUBB Subtract [səb'trækt] with Borrow 带借位减法vt. 减去；扣DA Decimal ['desiməl]adj. 小数的；十进位的n. 小数Adjust [ə'dʒʌst]调整十进制调整INC Increment ['inkrimənt加1 DEC Decrement 'dekrimənt]减1MUL Multiplication、Multiply 乘法[,mʌltipli'keiʃən n. [数] 乘法；增加['mʌltiplai vt. 乘；使增加；使繁殖；使相乘vi. 乘；繁殖；增加adv. 多样地；复合地adj. 多层的；多样的DIV Division[di'viʒən n. [数] 除法；部门；分割；师（军队）；赛区、Divide 除法di'vaid vt. 划分；除；分开；使产生分歧vi. 分开；意见分歧n. [地理] 分水岭，分水线(3)逻辑运算类指令（10种助记符）ANL And Logic 逻辑与'lɔdʒik] n. 逻辑；逻辑学；逻辑性adj. 逻辑的ORL OR Logic 逻辑或CLR Clear kliə]清零XRL Exclusive-OR Logic 逻辑异或[ik'sklu:siv] adj. 独有的；排外的；专一的n. 独家新闻；独家经营的项目；排外者CPL Complement 取反'kɔmplimənt] n. 补语；余角；补足物vt. 补足，补助RL Rotate left 循环左移[rəu'teit, 'rəut-, 'rəuteit vi.旋转；循环vt. 使旋转；使转动；使轮流adj. [植] 辐状的RLC Rotate Left throught the Carry flag 带进位循环左移RR Rotate Right 循环右移RRC Rotate Right throught the Carry flag 带进位循环右移SWAP Swap 低4位与高4位交换[swɔp, swɔ:p n. 交换；交换之物vt. 与...交换；以...作交换vi. 交换；交易(4)控制转移类指令（17种助记符）ACALL Absolute subroutine Call 子程序绝对调用'æbsəlju:t, ,æbsə'lju:t adj. 绝对的；完全的；专制的n. 绝对；绝对事物'sʌbru:,ti:n, ,sʌbru:'ti:n] n. [计] 子程序LCALL Long subroutine Call 子程序长调用RET Return from subroutine 子程序返回RETI Return from Interruption 中断返回SJMP Short Jump 短转移JMP Jump Indirect 间接跳越[,indi'rekt, -dai-] adj. 间接的；迂回的；非直截了当的AJMP Absolute Jump 绝对转移LJMP Long Jump 长转移CJNE Compare and Jump if Not Equal 比较不相等则转移kəm'pεə] vt. 比较；对照；比喻为vi. 比较；相比n. 比较DJNZ Decrement and Jump if Not Zero 减１后不为０则转移JZ Jump if Zero 结果为０则转移JNZ Jump if Not Zero 结果不为０则转移JC Jump if the Carry flag is set 有进位则转移JNC Jump if Not Carry 无进位则转移JB Jump if the Bit is set) B位为１则转移JNB Jump if the Bit is Not set B位为０则转移JBC Jump if the Bit is set and Clear the bit 位为１则转移，并清除该位NOP No Operation 空操作[,ɔpə'reiʃən] n. 操作；经营；[外科] 手术；[数][计] 运算（5）位操作指令（1种助记符）SETB Set Bit 置位伪指令助记符英文注释功能ORG OriginDB Define ByteDW Define WordEQU EqualDATA DataXDATA External DataBIT BitEND End51外部引脚缩写英文解释中文解释RST （9）Reset 复位信号引脚[,ri:'set, 'ri:set vi. 重置；清零vt. 重置；重新设定；重新组合n. 重新设定；重新组合；重排版RxD (10--P3.0) Receive Data 串口接收端TxD (11--P3.1) Transmit Data 串口发送端INT0(————) （12--P3.2）Interrupt0 外部中断0信号输入引脚INT1(————) （13--P3.3）Interrupt1 外部中断1信号输入引脚T0 (14--P3.4) Timer0 定时/计数器0输入信号引脚T1 (15--P3.5) Timer1 定时/计数器1输入信号引脚LSB = last significant bit//最低有效位significant [sig'nifikənt有效的WR(———) (16--P3.6) write写信号引脚RD(———) (17--P3.7) read 读信号引脚PSEN(—————) （29）programmer saving enable 外部程序存储器读选通信号ALE （30）Address Latch Enable 地址锁存允许信号EA(———) (31) enable 外部ROM选择信号51内部寄存器SFR special funtion register 特殊功能寄存器ACC accumulate 累加器A PSW programmer status word 程序状态字CY (PSW.7) carry 进位标志位AC (PSW.6) assistant carry 辅助进位标志位ə'sistənt] n. 助手，助理，助教adj. 辅助的，助理的；有帮助的OE = output enable //输出使能OV (PSW.2) overflow 溢出标志位[,əuvə'fləu, 'əuvəfləu]PC programmer counter 程序计数器DPTR data point register 数据指针寄存器SP stack point 堆栈指针TCON timer control 定时器控制寄存器TF1（TCON.7）Timer1 flag T1中断标志位TR1（TCON.6）Timer1 Run T1运行控制位TF0 （TCON.5）Timer0 flag T0中断标志位TR0 （TCON.4）Timer0 Run T0运行控制位IE1 （TCON.3） Interrupt1 exterior 外部中断1中断标志位ik'stiəriə adj. 外部的；表面的；外在的n. 外部；表面；外型；外貌MSB = most significant bit//最高有效位IT1 （TCON.2）Interrupt1 touch 外部中断1 触发方式选择位IE0 （TCON.1）Interrupt0 exterior 外部中断0中断标志位IT0 （TCON.0）Interrupt0 touch 0-电平触发1-下降沿触发IE （A8H）interrupt enable 中断允许寄存器EA (IE.7) enable all interrupt 中断总允许位ES (IE.4) enable serial 串行口中断允许位['siəriəl, 'si:r-] adj. 连续的；连载的；分期偿还的n.电视连续剧；[图情] 期刊；连载小说ET0 （IE.1）enable timer 0 T0中断允许位ET1（IE.3）enable timer 1 T1中断允许位EX1 （IE.2）enable exterior 1 外部中断1中断允许位EX0 （IE.0）enable exterior 0 外部中断0中断允许位IP （B8H）interrupt priority 中断优先级寄存器PS (IP.4) priority serial 串口优先级标志位PT1 (IP.3) priority timer 1 定时器1优先级标志位PX1 (IP.2) priority exterior 1 外部中断1优先级标志位PT0 (IP.1) priority timer 0 定时器0优先级标志位PX0 (IP.0) priority exterior 0 外部中断0优先级标志位PCON (87H) power control 电源控制和波特率选择TMOD （89H）timer mode 定时器方式控制寄存器。
51单片机英文缩写、全称及中文对照
字节交换
低半字节交换 入栈
出栈
符）
加法 带进位加法
带借位减法
十进制调整 加1 减1 乘法
符）
除法
逻辑与
逻辑或 逻辑异或
清零
取反 循环左移
带进位循环左移 循环右移
符）
带进位循环右移 低4位与高4位交换
子程序绝对调用 子程序长调用
子程序返回
中断返回 跳转指令 短转移 绝对转移 长转移 比较不相等则转移 减1后不为0则转移 结果为0则转移 结果不为0则转移 有进位则转移 无进位则转移 位为1则转移 位为0则转移 位为1则转移，并清除该位 空操作
（1）数据传送类指令（7种助记符）
助记符
英文注释
MOV Move
MOVC . Move Code
MOVX Move External R AM
XCH Exchange
XCHD Exchange low-order Digit
PUSH Push onto Stack
POP Pop from Stack
（5）位操作指令（1种助记符）
SETB Set Bit （6）伪指令
ORG Origin
DB
Define Byte
DW Define Word
EQU Equal
DATA Data
XDATA External Data
BIT Bit
END End
DS
Define storage
助记符）
功能 对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行 传送 读取程序存储器数据表格的数据传送
SJMP Short Jump
AJMP Absolute Jump
51单片机缩写的英文全称及中文名称
单片机缩写的英文全称及中文名称PC = programmer counter //程序计数器counter 计算器, 计数器, 计算者, 柜台, 筹码['kauntə]ACC = accumulate [ə'kju:mjuleit //累加器: 积累: 积聚PSW = programmer status word //程序状态字status'steitəs, 'stæ-]n. 地位；状态；情形；重要身分SP = stack point //堆栈指针stack[stæk n. 堆；堆叠vt. 使堆叠；把…堆积起来vi. 堆积，堆叠DPTR = data point register //数据指针寄存器'redʒistə寄存器IP = interrupt priority //中断优先级[,intə'rʌpt 中断[prai'ɔrəti] 优先；优先权；[数] 优先次序；优先考虑的事IE = interrupt enable // 中断使能i'neibl]使能够，使成为可能；授予权利或方法TMOD = timer mode // 定时器方式(定时器/计数器控制寄存器) ['taimə定时器，计时器mode [məud模式，方式ALE = alter (变更,可能是)['ɔ:ltə]PSEN = programmer saving enable //程序存储器使能(选择外部程序存储器的意思) EA = enable all(允许所有中断)完整应该是enable all interruptPROG = programme (程序)SFR = special funtion register //特殊功能寄存器TCON = timer control //定时器控制PCON = power control //电源控制MSB = most significant bit//最高有效位[sig'nifikənt有效的；有意义的LSB = last significant bit//最低有效位CY = carry //进位（标志）['kæri]AC = assistant carry //辅助进位[ə'sistənt n. 助手，助理，助教adj. 辅助的，助理的；有帮助的OV = overflow //溢出[,əuvə'fləu, 'əuvəfləu ORG = originally[ə'ridʒənəli //起始来源DB = define [di'fain]定义byte [bait] //字节定义EQU = equal //等于['i:kwəl]DW = define word //字定义 E = enable //使能OE = output enable //输出使能RD = read //读WR = write //写中断部分：INT0 = interrupt 0 //中断0 INT1 = interrupt 1//中断1T0 = timer 0 //定时器0 T1 = timer 1 //定时器1TF1 = timer1 flag //定时器1 标志(其实是定时器1中断标志位) [flæɡvi. 标记；衰退；枯萎vt. 标记；插旗n. 标志；旗子IE1 = interrupt exterior //(外部中断请求,可能是) ik'stiəriə]外部的IT1 = interrupt touch //(外部中断触发方式,可能是)ES = enable serial //串行使能['siəriəl, 'si:r- adj. 连续的；连载的；分期偿还的n. 电视连续剧；[图情] 期刊；连载小说serial communication [计]串行通信serial port [计]串行端口；序列埠serial interface [计]串联接口ET = enable timer //定时器使能PS = priority serial //串口优先级EX = enable exterior //外部使能(中断)[ik'stiəriə] adj. 外部的；表面的；外在的n. 外部；表面；外型；外貌PX = priority exterior //外部中断优先级PT = priority timer //定时器优先级寄存器部分:SFR:special funtion register //特殊功能寄存器(片内RAM 80H~FFH)ACC:accumulate //累加器SP:stack point //堆栈指针PSW:programmer status word //程序状态字IE:interrupt enable // 中断使能DPL,DPH:DPTR(data point register //数据指针寄存器)的低8位和高8位IP:interrupt priority //中断优先级PCON:power control //电源控制SCON:serial control //串行口控制TCON:timer control //定时器控制SBUF:serial buffer //串行数据缓冲['bʌfə] n. [计] 缓冲区；缓冲器，[车辆] 减震器vt. 缓冲TMOD:timer mode //定时器方式PSW:CY:carry (psw.7) //进位（标志）AC:auxiliary carry (psw.6) //辅助进位F0: (psw.5) //用户自定义标志位OV:overflow (psw.2) //溢出RS1,RS0:register select (psw.4,psw.3)//工作寄存器组选择位[si'lekt]挑选P:parity (psw.0) //奇偶校验位['pæriti. 平价；同等；相等IE:EA:Enable All Interrupt /CPU开/关中断控制位ET1:Enable Timer //定时器2溢出中断允许位ES:Enable Serial Port //串行口中断允许位EX:Enable External //外部中断1的中断允许位IP:PS:Priority Serial //串口优先级PT:Priority Timer //定时器优先级PX:Priority External //外部中断优先级[ik'stə:nəl] adj. 外部的；表面的；[药] 外用的；外国的；外面的n. 外部；外观；外面SCON:RI:Receive Interrupt //串行口接收中断请求标志位TI:Transmit Interrupt //串行口发送中断请求标志位[trænz'mit, træns-, trɑ:n-] vt. 传输；传播；发射；传达；遗传vi. 传输；发射信号TCON:TF1:Timer1 Overflow Flag //定时器1溢出中断请求标志TR1:Timer1 Run //定时器1启动控制位IE1:Interrupt Edge //外部中断1请求标志位[edʒ]IT1:Interrupt Type //外部中断1触发方式选择位8051引脚:RST:RESET (9)//复位，重启P3:RXD:Received eXchange [iks'tʃeindʒ Data (10,p3.0)//接收串行数据eXchange n. 交换；交流；交易所；兑换vt. 交换；交易；兑换vi. 交换；交易；兑换TXD:Transmit eXchange Data (11,p3.1)//发送串行数据INT0:interrupt 0 (12,p3.2)//中断0 INT1:interrupt 1 (13,p3.3)//中断1T0:timer 0 (14,p3.4)//定时器0 T1:timer 1 (15,p3.5)//定时器1RD：ReaD (16,p3.6)//外部数据存储器(RAM)的读信号WR：WRite (17,p3.7)//外部数据存储器(RAM)的写信号XTAL2,XTAL1:External Crystal ['kristəl晶体Oscillator ['ɔsileitə振荡器(18,19) //外部晶体振荡器PSEN:Program Store [stɔ:]Enable (29) //程序存储器(ROM)使能n. 商店；储备，贮藏；仓库vt. 贮藏，储存ALE:Address Latch Enable (30) //地址锁存Latch锁存器EA：External Address Enable (31) //外部程序存储器(ROM)地址允许其它：OE:output enable //输出使能MSB = most significant bit//最高有效位[sig'nifikənt] adj. 重大的；有效的；有意义的；值得注意的；意味深长的n. 象征；有意义的事物LSB = last significant bit//最低有效位DB = define byte //字节定义ORG = originally //起始来源EQU = equal //等于DW = define word //字定义CLKOUT：Clock out,时钟输出BUSWDITH：总线宽度Vref：参考电压（带ADC的单片机中有的）参考电压（Voltage Reference）['refərəns n. 参考，参照；HSO：High Speed Output，高速输出HSI：High Speed Input：高速输入INST：Instruction，指令READY就绪，总线中的就绪信号或引脚NMI：No Mask Interruput （Input）：不可屏蔽的中断请求（输入）[mɑ:sk, mæskBHE：Bank High Enable：存储器的高位允许，如在80286系统中RAM的组织为16位的，分为高8位和低8位数据，分别的控制信号为BHE和BLE Bank n. 银行；岸；浅滩；储库vt. 将…存入银行；倾斜转弯vi. 堆积；倾斜转弯MCS-51指令（1）数据传送类指令（7种助记符）助记符英文注释功能MOV Move 对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送MOVC Move Code 读取程序存储器数据表格的数据传送MOVX Move External RAM 对外部RAM的数据传送XCH Exchange 字节交换XCHD Exchange low-order Digit ['didʒit]低半字节交换POP Pop from Stack) 出栈PUSH Push onto ['ɔntu, -tə] Stack) 入栈（2）算术运算类指令（8种助记符）ADD Addition 加法ADDC Add with Carry 带进位加法SUBB Subtract [səb'trækt] with Borrow 带借位减法vt. 减去；扣DA Decimal ['desiməl]adj. 小数的；十进位的n. 小数Adjust [ə'dʒʌst]调整十进制调整INC Increment ['inkrimənt加1 DEC Decrement 'dekrimənt]减1MUL Multiplication、Multiply 乘法[,mʌltipli'keiʃən n. [数] 乘法；增加['mʌltiplai vt. 乘；使增加；使繁殖；使相乘vi. 乘；繁殖；增加adv. 多样地；复合地adj. 多层的；多样的DIV Division[di'viʒən n. [数] 除法；部门；分割；师（军队）；赛区、Divide 除法di'vaid vt. 划分；除；分开；使产生分歧vi. 分开；意见分歧n. [地理] 分水岭，分水线(3)逻辑运算类指令（10种助记符）ANL And Logic 逻辑与'lɔdʒik] n. 逻辑；逻辑学；逻辑性adj. 逻辑的ORL OR Logic 逻辑或CLR Clear kliə]清零XRL Exclusive-OR Logic 逻辑异或[ik'sklu:siv] adj. 独有的；排外的；专一的n. 独家新闻；独家经营的项目；排外者CPL Complement 取反'kɔmplimənt] n. 补语；余角；补足物vt. 补足，补助RL Rotate left 循环左移[rəu'teit, 'rəut-, 'rəuteit vi.旋转；循环vt. 使旋转；使转动；使轮流adj. [植] 辐状的RLC Rotate Left throught the Carry flag 带进位循环左移RR Rotate Right 循环右移RRC Rotate Right throught the Carry flag 带进位循环右移SWAP Swap 低4位与高4位交换[swɔp, swɔ:p n. 交换；交换之物vt. 与...交换；以...作交换vi. 交换；交易(4)控制转移类指令（17种助记符）ACALL Absolute subroutine Call 子程序绝对调用'æbsəlju:t, ,æbsə'lju:t adj. 绝对的；完全的；专制的n. 绝对；绝对事物'sʌbru:,ti:n, ,sʌbru:'ti:n] n. [计] 子程序LCALL Long subroutine Call 子程序长调用RET Return from subroutine 子程序返回RETI Return from Interruption 中断返回SJMP Short Jump 短转移JMP Jump Indirect 间接跳越[,indi'rekt, -dai-] adj. 间接的；迂回的；非直截了当的AJMP Absolute Jump 绝对转移LJMP Long Jump 长转移CJNE Compare and Jump if Not Equal 比较不相等则转移kəm'pεə] vt. 比较；对照；比喻为vi. 比较；相比n. 比较DJNZ Decrement and Jump if Not Zero 减１后不为０则转移JZ Jump if Zero 结果为０则转移JNZ Jump if Not Zero 结果不为０则转移JC Jump if the Carry flag is set 有进位则转移JNC Jump if Not Carry 无进位则转移JB Jump if the Bit is set) B位为１则转移JNB Jump if the Bit is Not set B位为０则转移JBC Jump if the Bit is set and Clear the bit 位为１则转移，并清除该位NOP No Operation 空操作[,ɔpə'reiʃən] n. 操作；经营；[外科] 手术；[数][计] 运算（5）位操作指令（1种助记符）SETB Set Bit 置位伪指令助记符英文注释功能ORG OriginDB Define ByteDW Define WordEQU EqualDATA DataXDATA External DataBIT BitEND End51外部引脚缩写英文解释中文解释RST （9）Reset 复位信号引脚[,ri:'set, 'ri:set vi. 重置；清零vt. 重置；重新设定；重新组合n. 重新设定；重新组合；重排版RxD (10--P3.0) Receive Data 串口接收端TxD (11--P3.1) Transmit Data 串口发送端INT0(————) （12--P3.2）Interrupt0 外部中断0信号输入引脚INT1(————) （13--P3.3）Interrupt1 外部中断1信号输入引脚T0 (14--P3.4) Timer0 定时/计数器0输入信号引脚T1 (15--P3.5) Timer1 定时/计数器1输入信号引脚LSB = last significant bit//最低有效位significant [sig'nifikənt有效的WR(———) (16--P3.6) write写信号引脚RD(———) (17--P3.7) read 读信号引脚PSEN(—————) （29）programmer saving enable 外部程序存储器读选通信号ALE （30）Address Latch Enable 地址锁存允许信号EA(———) (31) enable 外部ROM选择信号51内部寄存器SFR special funtion register 特殊功能寄存器ACC accumulate 累加器A PSW programmer status word 程序状态字CY (PSW.7) carry 进位标志位AC (PSW.6) assistant carry 辅助进位标志位ə'sistənt] n. 助手，助理，助教adj. 辅助的，助理的；有帮助的OE = output enable //输出使能OV (PSW.2) overflow 溢出标志位[,əuvə'fləu, 'əuvəfləu]PC programmer counter 程序计数器DPTR data point register 数据指针寄存器SP stack point 堆栈指针TCON timer control 定时器控制寄存器TF1（TCON.7）Timer1 flag T1中断标志位TR1（TCON.6）Timer1 Run T1运行控制位TF0 （TCON.5）Timer0 flag T0中断标志位TR0 （TCON.4）Timer0 Run T0运行控制位IE1 （TCON.3） Interrupt1 exterior 外部中断1中断标志位ik'stiəriə adj. 外部的；表面的；外在的n. 外部；表面；外型；外貌MSB = most significant bit//最高有效位IT1 （TCON.2）Interrupt1 touch 外部中断1 触发方式选择位IE0 （TCON.1）Interrupt0 exterior 外部中断0中断标志位IT0 （TCON.0）Interrupt0 touch 0-电平触发1-下降沿触发IE （A8H）interrupt enable 中断允许寄存器EA (IE.7) enable all interrupt 中断总允许位ES (IE.4) enable serial 串行口中断允许位['siəriəl, 'si:r-] adj. 连续的；连载的；分期偿还的n.电视连续剧；[图情] 期刊；连载小说ET0 （IE.1）enable timer 0 T0中断允许位ET1（IE.3）enable timer 1 T1中断允许位EX1 （IE.2）enable exterior 1 外部中断1中断允许位EX0 （IE.0）enable exterior 0 外部中断0中断允许位IP （B8H）interrupt priority 中断优先级寄存器PS (IP.4) priority serial 串口优先级标志位PT1 (IP.3) priority timer 1 定时器1优先级标志位PX1 (IP.2) priority exterior 1 外部中断1优先级标志位PT0 (IP.1) priority timer 0 定时器0优先级标志位PX0 (IP.0) priority exterior 0 外部中断0优先级标志位PCON (87H) power control 电源控制和波特率选择TMOD （89H）timer mode 定时器方式控制寄存器。
51单片机中英对照(详细)
51单片机专用寄存器中英文对照SFR Special Function Registers 专用寄存器、特殊功能寄存器Acc Accmulator 累加器PSW Program Status Word 程序状态字CY Carry 进位；AC Acid Carry 辅助进位；F0 Flag 标志（旗帜）0RS1 Register 1 寄存器（控制位）1；OV Over 溢出；P Parity 奇偶标志SP Stack Pointer 堆栈指针DPTR Data Pointer 数据指针P0~P3 Port 0~3 端口0~3SBUF Serial Data Buffer 串行数据缓冲器TH0 Timer High 定时器（计数初值）高8位TL0 Timer Low 定时器（计数初值）低8位TMOD Timer Mode 定时器模式GATE 门；M1M0 Mode 1、2 模式（方式）控制；TCON Timer Control 定时器控制TF Timer Flag 定时器（溢出）标志；TR Timer Run 定时器运行；IE Interrupt Enable 中断允许；IT Interrupt Trigger 中断触发SCON Serial Control 串行口控制SM Serial Mode 串行模式；REN Receive Enable （串行）接收允许；TB8 Transfer Bit 8 发送的第8位；RB8 Receive Bit 8 接收的第8位TI Transfer Interrupt 传送中断； RI Receive Interrupt 接收中断PCON Power Control 电源控制IE Interrupt Enable 中断允许EA Enable All 总允许；ES Enable Serial 允许串行（中断）；ET1 Enable Timer 1 允许定时器1（中断）；EX1 Enable eXternal 允许外部（中断）1IP Interrupt Priority 中断优先级PC Program Counter 程序计数器51单片机引脚中英文对照AD0~AD7 Address and Data 地址/数据线ALE Address Latch Enable 地址锁存允许PSEN Program （Memroy）Store Enable 程序（存储器）选通允许RST Reset 复位TXD Transmitted eXternal Data 外部数据输出线RXD Receive eXternal Data 外部数据输入线INT0 Interrupt 0 外中断0INT1 Interrupt 1 外中断1T0 Timer 0 定时器/计数器（输入端）0T1 Timer 1 定时器/计数器（输入端）1WR Wright 写（控制）RD Read 读（控制）EA External Access （Enable）外部存储器（允许）汇编语言助记符中英文对照direct 直接rel Relation 相对MOV Move 传送（移动）MOVX Move eXternal 外部传送MOVC Move Code 代码传送PUSH 推入（入栈）POP 弹出（出栈）XCH eXCHange 交换XCHD eXCHange Digit 低半字节交换SWAP 交换ADD Addition 加ADDC Addition with Carry 带进位位加SUBB Sub with Borrow带借位位减MUL Multiply 乘DIV Divide 除INC Incrememt 增量DEC Decrement 减量DA A Deicmal Adjusment 十进制调整ANL And Logic 与逻辑ORL OR Logic 或逻辑XRL 异或逻辑RL Rolate Left 循环左移RLC Rolate Left with Carry 带进位位循环左移RR Rolate Right 循环右移RRC Rolate Right with Carry 带进位位循环右移CPL Complement 取反（求补）CLR Clear 清除（零）LJMP Long Jump 长跳转AJMP Absolute Jump 绝对跳转SJMP Short Jump 短跳转JZ Jump if Acc equal Zero 如果ACC等于0，跳转JNZ Jump if Acc Not equal Zero 如果ACC不等于0，跳转CJNE Compare and Jump if Not Equal 比较，不等则转DJNZ Decrement and Jump if Not Zero 减1不等于零则转LCALL Long Call 长调用ACALL Absolute Call 绝对调用RET Return 返回RETI Return from Interrupt 中断返回NOP No Operation 空操作SETB Set Bit 置位JC Jump if Carry 如果CY=1，跳转JNC Jump if No Carry 如果CY不等于1（即等于0），跳转JB Jump if Bit 如果位等于1，跳转JNB Jump if No Bit 如果位不等于1（即等于0），跳转JBC Jump if Bit and Clear 如果位等于1，跳转并清0其他B Binary 二进制D Decimal 十进制H Hex 十六进制BCD Binary Coded Decimal 二进制编码十进制ASCII American Code for Information Interchange 信息内部交换美国码ROM Read Only Memrory 只读存储器PROM Programmable Read Only Memory 可编程序只读存储器EPROM Erasable Programmable Read Only Memory 可擦写可编程序只读存储器EEPROM Electrically Erasable Programmable Read Only Memory 电可擦写可编程序只读存储器RAM Random Access Memory 随机存储器SRAM Static Random Access Memory 静态随机存储器DRAM Dynamic RAM 动态随机存储器Flash Memory 闪烁存储器OE Out Enable 输出允许WE Wright Enable 写允许CE Chip Enable 芯片允许CS Chip Select 芯片选择KEY 键DISPLAY 显示D/A Digit to Analog 数/模转换A/D Analog to Digit 模/数转换CLK Clock 时钟ASYNC Asynchronous Data Communication 异步通信Baud rate 波特率UART Universal Asynchronous Receiver/Transmitter 异步接收/发送器51外部引脚缩写英文解释中文解释RST （9）Reset 复位信号引脚RxD (10--P3.0) Receive Data 串口接收端TxD (11--P3.1) Transmit Data 串口发送端INT0 （12--P3.2）Interrupt0 外部中断0信号输入引脚INT1 （13--P3.3）Interrupt1 外部中断1信号输入引脚T0 (14--P3.4) Timer0 定时/计数器0输入信号引脚T1 (15--P3.5) Timer1 定时/计数器1输入信号引脚WR (16--P3.6) write 写信号引脚RD (17--P3.7) read 读信号引脚PSEN （29）progammer saving enable 外部程序存储器读选通信号ALE （30）Address Latch Enable 地址锁存允许信号EA (31) enable 外部ROM选择信号51内部寄存器SFR special funtion register 特殊功能寄存器ACC accumulate 累加器APSW progammer status word 程序状态字CY (PSW.7) carry 进位标志位AC (PSW.6) assistant carry 辅助进位标志位OV (PSW.2) overflow 溢出标志位PC progammer counter 程序计数器DPTR data point register 数据指针寄存器SP stack point 堆栈指针TCON timer control 定时器控制寄存器TF1 （TCON.7）Timer1 flag T1中断标志位TR1 （TCON.6）Timer1 Run T1运行控制位TF0 （TCON.5）Timer0 flag T0中断标志位TR0 （TCON.4）Timer0 Run T0运行控制位IE1 （TCON.3）Interrupt1 exterior 外部中断1中断标志位IT1 （TCON.2）Interrupt1 touch 外部中断1 触发方式选择位IE0 （TCON.1）Interrupt0 exterior 外部中断0中断标志位IT0 （TCON.0）Interrupt0 touch 0-电平触发1-下降沿触发IE （A8H）interrupt enable 中断允许寄存器EA (IE.7) enable all interrupt 中断总允许位ES (IE.4) enable serial 串行口中断允许位ET1 （IE.3）enable timer 1 T1中断允许位EX1 （IE.2）enable exterior 1 外部中断1中断允许位ET0 （IE.1）enable timer 0 T0中断允许位EX0 （IE.0）enable exterior 0 外部中断0中断允许位IP （B8H）interrupt priority 中断优先级寄存器PS (IP.4) priority serial 串口优先级标志位PT1 (IP.3) priority timer 1 定时器1优先级标志位PX1 (IP.2) priority exterior 1 外部中断1优先级标志位PT0 (IP.1) priority timer 0 定时器0优先级标志位PX0 (IP.0) priority exterior 0 外部中断0优先级标志位PCON (87H) power control 电源控制和波特率选择TMOD （89H）timer mode 定时器方式控制寄存器MSB = most significant bit/ /最高有效位LSB = last significant bit/ /最低有效位OE = output enable / / 输出使。
51单片机英文缩写全称
MCS-51指令英语全简称（1）数据传送类指令（7种助记符）助记符英文注释功能MOV Move 对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送MOVC Move Code 读取程序存储器数据表格的数据传送MOVX Move External RAM 对外部RAM的数据传送XCH Exchange 字节交换XCHD Exchange low-order Digit 低半字节交换PUSH Push onto Stack) 入栈POP Pop from Stack) 出栈（2）算术运算类指令（8种助记符）ADD Addition 加法ADDC Add with Carry 带进位加法SUBB Subtract with Borrow 带借位减法DA Decimal Adjust 十进制调整INC Increment 加1DEC Decrement 减1MUL Multiplication、Multiply 乘法DIV Division、Divide 除法(3)逻辑运算类指令（10种助记符）ANL And Logic 逻辑与ORL OR Logic 逻辑或XRL Exclusive-OR Logic 逻辑异或CLR Clear 清零CPL Complement 取反RL Rotate left 循环左移RLC Rotate Left throught the Carry flag 带进位循环左移RR Rotate Right 循环右移RRC Rotate Right throught the Carry flag 带进位循环右移SWAP Swap 低4位与高4位交换(4)控制转移类指令（17种助记符）ACALL Absolute subroutine Call 子程序绝对调用LCALL Long subroutine Call 子程序长调用RET Return from subroutine 子程序返回RETI Return from Interruption 中断返回JMP Jump Indirect 跳转指令SJMP Short Jump 短转移AJMP Absolute Jump 绝对转移LJMP Long Jump 长转移CJNE Compare and Jump if Not Equal 比较不相等则转移DJNZ Decrement and Jump if Not Zero 减１后不为０则转移JZ Jump if Zero 结果为０则转移JNZ Jump if Not Zero 结果不为０则转移JC Jump if the Carry flag is set 有进位则转移JNC Jump if Not Carry 无进位则转移JB Jump if the Bit is set) B 位为１则转移JNB Jump if the Bit is Not set B 位为０则转移JBC Jump if the Bit is set and Clear the bit 位为１则转移，并清除该位NOP No Operation 空操作（5）位操作指令（1种助记符）SETB Set Bit 置位伪指令助记符英文注释功能ORG Origin 起始地址DB Define Byte 定义字节DW Define Word 定义字义EQU Equal 赋值（右赋左）等于DATA Data 数据赋值（右赋左）XDATA External Data 外部数据赋值（右赋左）BIT Bit 位地址赋值END End 汇编结束DS Define storage 定义存储空间51外部引脚缩写英文解释中文解释RST （9） Reset 复位信号引脚RxD Receive Data 串口接收端TxD Transmit Data 串口发送端INT0(————)（） Interrupt0 外部中断0信号输入引脚INT1(————) （） Interrupt1 外部中断1信号输入引脚T0 Timer0 定时/计数器0输入信号引脚T1 Timer1 定时/计数器1输入信号引脚WR(———) write 存储器的写信号写信号引脚RD(———) read 读信号引脚PSEN(—————) （29） progammer saving enable 外部程序存储器读选通信号ALE （30） Address Latch Enable 地址锁存允许信号EA(———) (31) enable 外部ROM选择信号51内部寄存器SFR special funtion register 特殊功能寄存器ACC accumulate 累加器APSW progammer status word 程序状态字CY carry 进位标志位AC assistant carry 辅助进位标志位OV overflow 溢出标志位PC progammer counter 程序计数器DPTR data point register 数据指针寄存器SP stack point 堆栈指针TCON timer control 定时器控制寄存器TF1 （） Timer1 flag T1中断标志位TR1 （） Timer1 Run T1运行控制位TF0 （） Timer0 flag T0中断标志位TR0 （） Timer0 Run T0运行控制位IE1 （） Interrupt1 exterior 外部中断1中断标志位IT1 （） Interrupt1 touch 外部中断1 触发方式选择位IE0 （） Interrupt0 exterior 外部中断0中断标志位IT0 （） Interrupt0 touch 0-电平触发 1-下降沿触发IE （A8H） interrupt enable 中断允许寄存器EA enable all interrupt 中断总允许位ES enable serial 串行口中断允许位ET1 （） enable timer 1 T1中断允许位EX1 （） enable exterior 1 外部中断1中断允许位ET0 （） enable timer 0 T0中断允许位EX0 （） enable exterior 0 外部中断0中断允许位IP （B8H） interrupt priority 中断优先级寄存器PS priority serial 串口优先级标志位PT1 priority timer 1 定时器1优先级标志位PX1 priority exterior 1 外部中断1优先级标志位PT0 priority timer 0 定时器0优先级标志位PX0 priority exterior 0 外部中断0优先级标志位PCON (87H) power control 电源控制和波特率选择TMOD （89H） timer mode 定时器方式控制寄存器MSB = most significant bit//最高有效位LSB = last significant bit//最低有效位OE = output enable //输出使能PROG progamme 程序XTAL:External Crystal Oscillator,外部晶体振荡器CLKOUT：Clock out,时钟输出BUSWDITH：总线宽度Vref：参考电压（带ADC的单片机中有的）RESET：复位，重启ACH：HSO：High Speed Output，高速输出HSI：High Speed Input：高速输入INST：Instruction，指令READY：就绪，总线中的就绪信号或引脚NMI：No Mask Interruput （Input）：不可屏蔽的中断请求（输入）RXD：Receive Data ，接收串行数据，单片机中有UART/USART功能的串行数据输入引脚TXD：Transmit Data，发送串行数据，单片机中有UART/USART功能的串行数据输出引脚BHE：Bank High Enable：存储器的高位允许，如在80286系统中RAM的组织为16位的，分为高8位和低8位数据，分别的控制信号为BHE和BLEALE：Address Latch Enable，地址信号锁定允许，这在早期Intel总线结构中是必不可少的信号，常和锁存器使用来分离地址/数据复用端口的地址和数据信。
51单片机汇编指令集(附记忆方法)
51单片机汇编指令集一、数据传送类指令（7种助记符）MOV（英文为Move）：对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送；MOVC（Move Code）读取程序存储器数据表格的数据传送；MOVX (Move External RAM) 对外部RAM的数据传送；XCH (Exchange) 字节交换；XCHD (Exchange low-order Digit) 低半字节交换；PUSH (Push onto Stack) 入栈；POP (Pop from Stack) 出栈；二、算术运算类指令（8种助记符）ADD(Addition) 加法；ADDC(Add with Carry) 带进位加法；SUBB(Subtract with Borrow) 带借位减法；DA(Decimal Adjust) 十进制调整；INC(Increment) 加1；DEC(Decrement) 减1；MUL(Multiplication、Multiply) 乘法；DIV(Division、Divide) 除法；三、逻辑运算类指令（10种助记符）ANL(AND Logic) 逻辑与；ORL(OR Logic) 逻辑或；XRL(Exclusive-OR Logic) 逻辑异或；CLR(Clear) 清零；CPL(Complement) 取反；RL(Rotate left) 循环左移；RLC(Rotate Left throught the Carry flag) 带进位循环左移；RR(Rotate Right) 循环右移；RRC (Rotate Right throught the Carry flag) 带进位循环右移；SWAP (Swap) 低4位与高4位交换；四、控制转移类指令（17种助记符）ACALL（Absolute subroutine Call）子程序绝对调用；LCALL（Long subroutine Call）子程序长调用；RET（Return from subroutine）子程序返回；RETI（Return from Interruption）中断返回；SJMP（Short Jump）短转移；AJMP（Absolute Jump）绝对转移；LJMP（Long Jump）长转移；CJNE (Compare Jump if Not Equal)比较不相等则转移；DJNZ (Decrement Jump if Not Zero)减１后不为０则转移；JZ (Jump if Zero)结果为０则转移；JNZ (Jump if Not Zero) 结果不为０则转移；JC (Jump if the Carry flag is set)有进位则转移；JNC (Jump if Not Carry)无进位则转移；JB (Jump if the Bit is set)位为１则转移；JNB (Jump if the Bit is Not set) 位为０则转移；JBC(Jump if the Bit is set and Clear the bit) 位为１则转移，并清除该位；NOP (No Operation) 空操作；五、位操作指令（1种助记符）CLR 位清零；SETB(Set Bit) 位置１。
51单片机汇编指令集(附记忆方法)
51单片机汇编指令集(附记忆方法) MOV（英文为Move）：对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送；MOVC（Move Code）读取程序存储器数据表格的数据传送； MOVX (Move External RAM) 对外部RAM的数据传送； XCH (Exchange) 字节交换；XCHD (Exchange low-order Digit) 低半字节交换； PUSH (Push onto Stack) 入栈；POP (Pop from Stack) 出栈；ADD(Addition) 加法；ADDC(Add with Carry) 带进位加法；SUBB(Subtract with Borrow) 带借位减法；DA(Decimal Adjust) 十进制调整；INC(Increment) 加1；DEC(Decrement) 减1；MUL(Multiplication、Multiply) 乘法；DIV(Division、Divide) 除法；ANL(AND Logic) 逻辑与；ORL(OR Logic) 逻辑或；XRL(Exclusive-OR Logic) 逻辑异或；CLR(Clear) 清零；CPL(Complement) 取反；RL(Rotate left) 循环左移；RLC(Rotate Left throught the Carry flag) 带进位循环左移； RR(Rotate Right) 循环右移；RRC (Rotate Right throught the Carry flag) 带进位循环右移；SWAP (Swap) 低4位与高4位交换；ACALL（Absolute subroutine Call）子程序绝对调用； LCALL（Long subroutine Call）子程序长调用； RET（Return from subroutine）子程序返回； RETI（Return from Interruption）中断返回； SJMP（Short Jump）短转移；AJMP（Absolute Jump）绝对转移；LJMP（Long Jump）长转移；CJNE (Compare Jump if Not Equal)比较不相等则转移；- 1 -DJNZ (Decrement Jump if Not Zero)减１后不为０则转移； JZ (Jump if Zero)结果为０则转移；JNZ (Jump if Not Zero) 结果不为０则转移；JC (Jump if the Carry flag is set)有进位则转移； JNC (Jump if Not Carry)无进位则转移；JB (Jump if the Bit is set)位为１则转移；JNB (Jump if the Bit is Not set) 位为０则转移； JBC(Jump if the Bit is set and Clear the bit) 位为１则转移，并清除该位；NOP (No Operation) 空操作；CLR 位清零；SETB(Set Bit) 位置１。
51单片机英文及其翻译
英文翻译原文：51 Microcontroller IntroductionMicrocontrollers basic component is a central processing unit (CPU in the computing device and controller), read-only memory (usually expressed as a ROM), read-write memory (also known as Random Access Memory MRAM is usually expressed as a RAM) , input / output port (also divided into parallel port and serial port, expressed as I / O port), and so composed. In fact there is also a clock circuit microcontroller, so that during operation and control of the microcontroller, can rhythmic manner. In addition, there are so-called "break system", the system is a "janitor" role, when the microcontroller control object parameters that need to be intervention to reach a particular state, can after this "janitor" communicated to the CPU, so that CPU priorities of the external events to take appropriate counter-measures.Microcontrollers are used in a multitude of commercial applications such as modems, motor-control systems, air conditioner control systems, automotive engine and among others. The high processing speed and enhanced peripheral set of these microcontrollers make them suitable for such high-speed event-based applications. However, these critical application domains also require that these microcontrollers are highly reliable. The high reliability and low market risks can be ensured by a robust testing process and a proper tools environment for the validation of these microcontrollers both at the component and at the system level. Intel Platform Engineering department developed an object-oriented multi-threaded test environment for the validation of its AT89C51 automotive microcontrollers. The goals of this environment was not only to provide a robust testing environment for the AT89C51 automotive microcontrollers, but to develop an environment which can be easily extended and reused for the validation of several other future microcontrollers. The environment was developed in conjunction with Microsoft Foundation Classes (AT89C51). The paper describes the design and mechanism of this test environment, its interactions with various hardware/software environmental components, and how to use AT89C51.Are 8-bit microcontroller early or 4 bits. One of the most successful is the INTEL 8031, for a simple, reliable and good performance was a lot of praise. Then developed in 8031 out of MCS51 MCU Systems. SCM systems based on this system until now is still widely used. With the increased requirements of industrial control field, began a 16-bit microcontroller, but not ideal because the cost has not been very widely used. After 90 years with the great development of consumer electronics, microcontroller technology has been a huge increase. With INTEL i960 series, especially the later series of widely used ARM, 32-bit microcontroller quickly replace high-end 16-bit MCU status and enter the mainstream market. The traditional 8-bit microcontroller performance have been therapid increase capacity increase compared to 80 the number of times. Currently, high-end 32-bit microcontroller clocked over 300MHz, the performance catching the mid-90s dedicated processor, while the average model prices fall to one U.S. dollar, the most high-end model is only 10 dollars. Modern SCM systems are no longer only in the development and use of bare metal environment, a large number of proprietary embedded operating system is widely used in the full range of SCM. The handheld computers and cell phones as the core processing of high-end microcontroller can even use a dedicated Windows and Linux operating systems.SCM relies on the program, and can be modified. Through different procedures to achieve different functions, in particular special unique features, this is another device much effort needs to be done, some are great efforts are very difficult to achieve. A not very complex functions if the 50's with the United States developed 74 series, or the 60's CD4000 series of these pure hardware buttoned, then the circuit must be a large PCB board! But if the United States if the 70's with a series of successful SCM market, the result will be a drastic change! Just because you are prepared by microcomputer programs can achieve high intelligence, high efficiency and high reliability!IntroductionThe 8-bit AT89C51 CHMOS microcontrollers are designed to handle high-speed calculations and fast input/output operations. MCS 51 microcontrollers are typically used for high-speed event control systems. Commercial applications include modems, motor-control systems, printers, photocopiers, air conditioner control systems, disk drives, and medical instruments. The automotive industry use MCS 51 microcontrollers in engine-control systems, airbags, suspension systems, and antilock braking systems (ABS). The AT89C51 is especially well suited to applications that benefit from its processing speed and enhanced on-chip peripheral functions set, such as automotive power-train control, vehicle dynamic suspension, antilock braking, and stability control applications. Because of these critical applications, the market requires a reliable cost-effective controller with a low interrupt latency response, ability to service the high number of time and event driven integrated peripherals needed in real time applications, and a CPU with above average processing power in a single package. The financial and legal risk of having devices that operate unpredictably is very high. Once in the market, particularly in mission critical applications such as an autopilot or anti-lock braking system, mistakes are financiallyProhibitive. Redesign costs can run as high as a $500K, much more if the fix means back annotating it across a product family that share the same core and/or peripheral design flaw. In addition, field replacements of components are extremely expensive, as the devices are typically sealed in modules with a total value several times that of the component. To mitigate these problems, it is essential that comprehensive testing of the controllers be carried out at both the component level and system level under worst case environmental and voltage conditions. This complete and thorough validation necessitates not only a well-defined process but also a proper environment and tools to facilitate and execute the mission successfully.Intel Chandler Platform Engineering group provides postSilicon system validation (SV) of various micro-controllers and processors. The system validation process can be broken into three major parts. The type of the device and its application requirements determine which types of testing are performed on the device.The AT89C51 provides the following standard features: 4Kbytes of flash, 128 bytes of RAM, 32 I/O lines, two 16-bittimer/counters, five vector two-level interrupt architecture, a full duple ser -ail port, on-chip oscillator and clock circuitry. In addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt sys -tem to continue functioning. The Power-down Mode saves the RAM contents but freezes the social -labor disabling all other chip functions until the next hardware reset.Pin DescriptionVCC Supply voltage.GND Ground.Port 0Port 0 is an 8-bit open-drain bi-directional I/O port. As an output port, each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as high impedance inputs.Port 0 may also be configured to be the multiplexed lowered address/data bus during accesses to external program and data memory. In this mode P0 has internal pull-ups’.Port 0 also receives the code bytes during Flash programming, and outputs the code bytes during program verification. External pull-ups are required during program verification.Port 1Port 1 is an 8-bit bi-directional I/O port with internal pullups.The Port 1 output buffers can sink/so -urge four TTL inputs. When 1s are written to Port 1 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 1 also receives the low-order address bytes during Flash programming and verification.Port 2Port 2 is an 8-bit bi-directional I/O port with internal pullups.The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 2 emits the high-order address byte during fetches from external program memory and during accesses to Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups.Port 2 emits the high-order address byte during fetches from external program memory and during accesses to external data memory that uses 16-bit addresses (MOVX @DPTR). In this application, it uses strong internal pull-ups when emitting 1s. During accesses to external data memory that uses 8-bit addresses (MOVX @ RI); Port 2 emits the contents of the P2 Special Function Register.Port 2 also receives the high-order address bits and some control signals during Flash programming and verification.Port 3Port 3 is an 8-bit bi-directional I/O port with internal pullups.The Port 3 output buffers can sink/soul -race four TTL inputs. When 1s are written to Port 3 pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (IIL) because of the pull-ups.RSTReset input. A high on this pin for two machine cycles while the oscillator is running resets the device.ALE/PROGAddress Latch Enable output pulse for latching the low byte of the address during accesses to external memory.This pin is also the program pulse input (PROG) during Flash programming.In normal operation ALE is emitted at a constant rate of 1/6 the oscillator frequency, and may be used for external timing or clocking purposes. Note, however, that one ALE pulse is skipped dui -nag each access to external DataMemory.If desired, ALE operation can be disabled by setting bit 0 of SFR location 8EH. With the bit set, ALE is active only during a MOVX or MOVC instruction. Otherwise, the pin is weakly pulled high. Setting the ALE-disable bit has no effect if the microcontroller is in external execution mode.PSENProgram Store Enable is the read strobe to external program memory. When the AT89C51 is executing code from external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory.EA/VPPExternal Access Enable. EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. Note, however, that if lock bit 1 is programmed, EA will be internally latched on reset. A should be strapped to VCC for internal program executions. This pin also receives the 12-volt programming enable voltage (VPP) during Flash programming, for parts that require 12-volt VPP.The AT89C51 code memory array is programmed byte-by byte in either programming mode. To program any nonblank byte in the on-chip Flash Memory, the entire memory must be erased using the Chip Erase Mode.Data Polling: The AT89C51 features Data Polling to indicate the end of a write cycle. During a write cycle, an attempted read of the last byte written will result in the complement of the written datum on PO.7. Once the write cycle has been completed, true data are valid on all outputs, andThe next cycle may begin. Data Polling may begin any time after a write cycle has been initiated.Ready/Busy: The progress of byte programming can also be monitored by the RDY/BSY output signal. P3.4 is pulled low after ALE goes high during programming to indicate BUSY. P3.4 is pulled high again when programming is done to indicate READY.Program Verify: If lock bits LB1 and LB2 have not been programmed, the programmed code data can be read back via the address and data lines for verification. The lock bits cannot be verified directly. Verification of the lock bits is achieved byobserving that their features are enabled.A microcomputer interface converts information between two forms. Outside the microcomputer the information handled by an electronic system exists as a physical signal, but within the program, it is represented numerically. The function of any interface can be broken down into a number of operations which modify the data in some way, so that the process of conversion between the external and internal forms is carried out in a number of steps.An analog-to-digital converter (ADC) is used to convert a continuously variable signal to a corresponding digital form which can take any one of a fixed number of possible binary values. If the output of the transducer does not vary continuously, no ADC is necessary. In this case the signal conditioning section must convert the incoming signal to a form which can be connected directly to the next part of the interface, the input/output section of the microcomputer itself.Output interfaces take a similar form, the obvious difference being that here the flow of information is in the opposite direction; it is passed from the program to the outside world. In this case the program may call an output subroutine which supervises the operation of the interface and performs the scaling numbers which may be needed for a digital-to-analog converter (DAC). This subroutine passes information in turn to an output device which produces a corresponding electrical signal, which could be converted into analog form using a DAC. Finally the signal is conditioned (usually amplified) to a form suitable for operating an actuator.The signals used within microcomputer circuits are almost always too small to be connected directly to the “outside world” and some kind of interface must be used to translate them to a more appropriate form. The design of section of interface circuits is one of the most important tasks facing the engineer wishing to apply microcomputers. We have seen that in microcomputers information is represented as discrete patterns of bits; this digital form is most useful when the microcomputer is to be connected to equipment which can only be switched on or off, where each bit might represent the state of a switch or actuator.To solve real-world problems, a microcontroller must have more than just a CPU, a program, and a data memory. In addition, it must contain hardware allowing the CPU to access information from the outside world. Once the CPU gathers information and processes the data, it must also be able to effect change on some portion of the outside world. T hese hardware devices, called peripherals, are the CPU’s window t o the outside.The most basic form of peripheral available on microcontrollers is the general purpose I70 port. Each of the I/O pins can be used as either an input or an output. The function of each pin is determined by setting or clearing corresponding bits in a corresponding data direction register during the initialization stage of a program. Each output pin may be driven to either a logic one or a logic zero by using CPU instructions to pin may be viewed (or read.) by the CPU using program instructions.Some type of serial unit is included on microcontrollers to allow the CPU to communicate bit-serially with external devices. Using a bit serial format instead of bit-parallel format requires fewer I/O pins to perform the communication function, which makes it less expensive, but slower. Serial transmissions are performed either synchronously or asynchronously.Its applicationsSCM is widely used in instruments and meters, household appliances, medical equipment, aerospace, specialized equipment, intelligent management and process control fields, roughly divided into the following several areas:SCM has a small size, low power consumption, controlling function, expansion flexibility, the advantages of miniaturization and ease of use, widely used instrument, combining different types of sensors can be realized, such as voltage, power, frequency, humidity, temperature, flow, speed, thickness, angle, length, hardness, elemental, physical pressure measurement. SCM makes use of digital instruments, intelligence, miniaturization, and functionality than the use of more powerful electronic or digital circuits. Such as precision measuring equipment (power meter, oscilloscope, various analytical instrument).译文：51单片机简介单片机的基本组成是由中央处理器（即CPU中的运算器和控制器）、只读存贮器（通常表示为ROM）、读写存贮器（又称随机存贮器通常表示为RAM）、输入/输出口（又分为并行口和串行口，表示为I/O口）等等组成。
51单片机汇编指令集合(中英指令翻译)
一、数据传送类指令（7种助记符）MOV（英文为Move）：对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送；MOVC（Move Code）读取程序存储器数据表格的数据传送；MOVX (Move External RAM) 对外部RAM的数据传送；XCH (Exchange) 字节交换；XCHD (Exchange low-order Digit) 低半字节交换；PUSH (Push onto Stack) 入栈；POP (Pop from Stack) 出栈；二、算术运算类指令（8种助记符）ADD(Addition) 加法；ADDC(Add with Carry) 带进位加法；SUBB(Subtract with Borrow) 带借位减法；DA(Decimal Adjust) 十进制调整；INC(Increment) 加1；DEC(Decrement) 减1；MUL(Multiplication、Multiply) 乘法；DIV(Division、Divide) 除法；三、逻辑运算类指令（10种助记符）ANL(AND Logic) 逻辑与；ORL(OR Logic) 逻辑或；XRL(Exclusive-OR Logic) 逻辑异或；CLR(Clear) 清零；CPL(Complement) 取反；RL(Rotate left) 循环左移；RLC(Rotate Left throught the Carry flag) 带进位循环左移；RR(Rotate Right) 循环右移；RRC (Rotate Right throught the Carry flag) 带进位循环右移；SWAP (Swap) 低4位与高4位交换；四、控制转移类指令（17种助记符）ACALL（Absolute subroutine Call）子程序绝对调用；LCALL（Long subroutine Call）子程序长调用；RET（Return from subroutine）子程序返回；RETI（Return from Interruption）中断返回；SJMP（Short Jump）短转移；AJMP（Absolute Jump）绝对转移；LJMP（Long Jump）长转移；CJNE (Compare Jump if Not Equal)比较不相等则转移；DJNZ (Decrement Jump if Not Zero)减１后不为０则转移；JZ (Jump if Zero)结果为０则转移；JNZ (Jump if Not Zero) 结果不为０则转移；JC (Jump if the Carry flag is set)有进位则转移；JNC (Jump if Not Carry)无进位则转移；JB (Jump if the Bit is set)位为１则转移；JNB (Jump if the Bit is Not set) 位为０则转移；JBC(Jump if the Bit is set and Clear the bit) 位为１则转移，并清除该位；NOP (No Operation) 空操作；五、位操作指令（1种助记符）CLR 位清零；SETB(Set Bit) 位置１。
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四、控制转移类指令（17种助记符）
Absolute subroutine Call Long subroutine Call Return from subroutine Return from Interruption Short Jump Absolute Jump Long Jump Compare Jump if Not Equal Decrement Jump if Not Zero Jump if Zero Jump if Not Zero Jump if the Carry flag is set Jump if Not Carry Jump if the Bit is set Jump if the Bit is Not set Jump if the Bit is set and Clear the bit No Operation
五、位操作指令（1种助记符）
Set Bit二、算术运源自类指令（8种助记符）三、逻辑运算类指令（10种助记符）
AND Logic OR Logic Exclusive-OR Logic Clear Complement Rotate left Rotate Left throught the Carry flag Rotate Right Rotate Right throught the Carry flag Swap
说明
对内部数据寄存器RAM和特殊功能寄存器SFR 的数据进行传送 读取程序存储器数据表格的数据传送 对外部RAM的数据传送 字节交换 低半字节交换 入栈 出栈 加法 带进位加法 带借位减法 十进制调整 加1 减1 乘法 除法 逻辑与 逻辑或 逻辑异或 清零 取反 循环左移 带进位循环左移 循环右移 带进位循环右移 低4位与高4位交换 子程序绝对调用 子程序长调用 子程序返回 中断返回 短转移 绝对转移 长转移 比较不相等则转移 减1后不为0则转移 结果为0则转移 结果不为0则转移 有进位则转移 无进位则转移 位为1则转移 位为0则转移 位为1则转移，并清除该位 空操作 位 置1
汇编指令集英文解释
符号 MOV MOVC MOVX XCH XCHD PUSH POP ADD ADDC SUBB DA INC DEC MUL DIV ANL ORL XRL CLR CPL RL RLC RR RRC SWAP ACALL LCALL RET RETI SJMP AJMP LJMP CJNE DJNZ JZ JNZ JC JNC JB JNB JBC NOP SETB 一、数据传送类指令（7种助记符） 英文
Move Move Code Move External RAM Exchange Exchange low-order Digit Push onto Stack Pop from Stack Addition Add with Carry Subtract with Borrow Decimal Adjust Increment Decrement Multiplication、Multiply Division、Divide