54ACT818中文资料

54ACT8188-Bit Diagnostic RegisterGeneral DescriptionThe ’ACT818is a high-speed,general-purpose pipeline reg-ister with an on-board diagnostic register for performing se-rial diagnostics and/or writable control store loading.The D-to-Y path provides an 8-bit parallel data path pipeline register for normal system operation.The diagnostic register can load parallel data to or from the pipeline register and can output data through the D input port (as in WCS loading).The 8-bit diagnostic register has multiplexer inputs that se-lect parallel inputs from the Y-port or adjacent bits in the di-agnostic register to operate as a right-shift-only register.This register can then participate in a serial loop throughout the system where normal data,address,status and control reg-isters are replaced with ’ACT818diagnostic pipeline regis-ters.The loop can be used to scan in a complete test routine starting point (Data,Address,etc.).Then after a specified number of machine cycles it scans out the results to be in-spected for the expected results.WCS loading can be ac-complished using the same technique.An instruction word can be serially shifted into the shadow register and written into the WCS RAM by enabling the D output.Featuresn On-line and off-line system diagnosticsn Swaps the contents of diagnostic register and output registern Diagnostic register and diagnostic testingn Cascadable for wide control words as used in microprogrammingn Edge-triggered D registers n Outputs source/sink 24mAn ’ACT818has TTL-compatible inputsn ’ACT818is functionally-and pin-compatible to AMD Am29818and MMI 74S818n Standard Microcircuit Drawing (SMD)5962-9160901Applicationsn Register for microprogram control store n Status register n Data registern Instruction register n Interrupt mask register n Pipeline registern General purpose registernParallel-serial/serial-parallel converterLogic SymbolTRI-STATE ®is a registered trademark of National Semiconductor Corporation.FACT ™is a trademark of Fairchild Semiconductor Corporation.DS100251-3September 199854ACT8188-Bit Diagnostic Register©1998National Semiconductor Corporation Connection DiagramsPin Names DescriptionD 0–D 7Data Inputs SDI Serial Data Input DCLK Diagnostics Clock MODE Control InputPCLK Pipeline Register Clock OEY Output Enable Input SDO Serial Data Output Y 0–Y 7Data OutputsDiagnostic RegisterPin Assignment for DIP and FlatpakDS100251-1Pin Assignmentfor LCCDS100251-2DS100251-4 2Block Diagram Functional DescriptionData transfers into the diagnostic register occur on the LOW-to-HIGH transition of DCLK.Mode and SDI determine what data source will be loaded.The pipeline register is loaded on the LOW-to-HIGH transition of PCLK.Mode se-lects whether the data source is the data input or the diag-nostic register output.Because of the independence of the clock inputs,data can be shifted in the diagnostic register via DCLK and loaded into the pipeline register from the data in-put via PCLK simultaneously,as long as no setup or hold times are violated.This simultaneous operation is legal.Function TableInputs Outputs OperationSDI MODE DCLK PCLK SDO Diagnostic Reg.Pipeline Reg.X L N X S7SI<SI−1,NA Serial Shift;D7–D0DisabledSO<SD IX L X N S7NA PI<DI Normal Load Pipeline RegisterL H N X L SI<YI NA Load Diagnostic Register from Y;DI DisabledX H X N SDI NA PI<SI Load Pipeline Register fromDiagnostic RegisterH H N X H Hold NA Hold Diagnostic Register;DIEnabledH=HIGH Voltage LevelL=LOW Voltage LevelX=ImmaterialN=LOW-to-HIGH Clock TransitionDS100251-53Absolute Maximum Ratings(Note1)If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.Supply Voltage(V CC)−0.5V to+7.0V DC Input Diode Current(I IK)V I=−0.5V−20mA V I=V CC+0.5V+20mA DC Input Voltage(V I)−0.5V to V CC+0.5V DC Output Diode Current(I OK)V O=−0.5V−20mA V O=V CC+0.5V+20mA DC Output Voltage(V O)−0.5V to V CC+0.5V DC Output Sourceor Sink Current(I O)±50mA DC V CC or Ground Currentper Output Pin(I CC or I GND)±50mA Storage Temperature(T STG)−65˚C to+150˚C Junction Temperature(T J)CDIP175˚C Recommended Operating ConditionsSupply Voltage(V CC)’ACT 4.5V to5.5V Input Voltage(V I)0V to V CC Output Voltage(V O)0V to V CC Operating Temperature(T A)54ACT−55˚C to+125˚C Minimum Input Edge Rate(∆V/∆t)’ACT DevicesV IN from0.8V to2.0VV CC@4.5V,5.5V125mV/ns Note1:Absolute maximum ratings are those values beyond which damage to the device may occur.The databook specifications should be met,without exception,to ensure that the system design is reliable over its power supply, temperature,and output/input loading variables.National does not recom-mend operation of FACT™circuits outside databook specifications.Note2:All outputs loaded;thresholds on input associated with output under test.DC Characteristics for’ACT Family Devices54ACTSymbol Parameter V CC T A=Units Conditions(V)−55˚C to+125˚CGuaranteed LimitsV IH Minimum High Level 4.5 2.0V V OUT=0.1V Input Voltage 5.5 2.0or V CC−0.1V V IL Maximum Low Level 4.50.8V OUT=0.1V Input Voltage 5.50.8or V CC−0.1VI IN Maximum Input 5.5±1.0µA V IN=V CCLeakage CurrentI OZ Maximum TRI-STATE 5.5±1.0µA OE=V IHLeakage Current V OUT=0V,V CCI CC Maximum Quiescent 5.5160µA V IN=V CC or GNDSupply CurrentI CCT Maximum Additional 5.5 1.6mA V IN=V CC−2.1VI CC/Input V CC=5.5VV OH Minimum HIGH(Note2)V IN=V IL or V IH Level Output Voltage, 4.5 3.70V I OH=−24mAY0–Y7Outputs 5.5 4.70V I OH=−24mAMinimum HIGHLevel Output Voltage, 4.5 3.70V I OH=−8mAD0–D7,SDO Outputs 5.5 4.70V I OH=−8mA V OL Maximum LOW(Note2)V IN=V IL or V IH Level Output Voltage, 4.50.50V I OL=24mAY0–Y7Outputs 5.50.50V I OL=24mAMaximum LOWLevel Output Voltage, 4.50.50V I OL=8mAD0–D7,SDO Outputs 5.50.50V I OL=8mA4DC Characteristics for’ACT Family Devices(Continued)54ACTSymbol Parameter V CC T A=Units Conditions(V)−55˚C to+125˚CGuaranteed LimitsI OLD Minimum Dynamic V OLD=1.65V MaxOutput Current, 5.550mAY0–Y7OutputsI OHD Minimum Dynamic V OHD=3.85V MinOutput Current, 5.5−50mAY0–Y7OutputsI OLD Minimum Dynamic V OLD=1.65V MaxOutput Current, 5.532mAD0–D7,SDO Outputs(Note4)I OHD Minimum Dynamic V OHD=3.85V MinOutput Current, 5.5−32mAD0–D7,SDO Outputs(Note4)Note3:Maximum test duration2.0ms,one output loaded at a time.Note4:Test load50pF,500Ωto ground.Note5:I CC for54ACT@25˚C is identical to74ACT@25˚C.AC Electrical Characteristics54ACTV CC T A=−55˚C Fig. Symbol Parameter(V)to+125˚C Units No.(Note6)C L=50pFMin Maxt PHL Propagation Delay 5.0 2.510.0nsPCLK to Yt PLH Propagation Delay 5.0 2.510.0nsPCLK to Yt PHL Propagation Delay 5.0 3.512.0nsMODE to SDOt PLH Propagation Delay 5.0 3.513.5nsMODE to SDOt PHL Propagation Delay 5.0 3.011.5nsSDI to SDOt PLH Propagation Delay 5.0 3.012.0nsSDI to SDOt PHL Propagation Delay 5.0 3.514.0nsDCLK to SDOt PLH Propagation Delay 5.0 3.515.5nsDCLK to SDOt PZL Output Enable Time 5.0 2.512.0nsOEY to Y nt PLZ Output Disable Time 5.0 1.510.0nsOEY to Y nt PZL Output Enable Time 5.0 3.014.0nsDCLK to D n5AC Electrical Characteristics(Continued)54ACTV CC T A=−55˚C Fig.Symbol Parameter(V)to+125˚C Units No.(Note6)C L=50pFMin Maxt PLZ Output Disable Time 5.0 1.512.0ns DCLK to D nt PZH Output Enable Time 5.0 2.511.0ns OEY to Y nt PHZ Output Disable Time 5.0 2.012.0ns OEY to Y nt PZH Output Enable Time 5.0 3.013.5ns DCLK to D nt PHZ Output Disable Time 5.0 2.013.5ns DCLK to D nNote6:Voltage Range5.0is5.0V±0.5V.AC Operating Requirements54ACTV CC T A=−55˚C Fig.Symbol Parameter(V)to+125˚C Units No.(Note8)C L=50pFGuaranteed Minimumt s Setup Time 5.0 6.0nsD to PCLKt h Hold Time 5.0 1.0nsD to PCLKt s Setup Time 5.0 6.0nsMODE to PCLKt h Hold Time 5.00.0nsMODE to PCLKt s Setup Time 5.0 2.5nsY to DCLKt h Hold Time 5.0 1.5nsY to DCLKt s Setup Time 5.0 4.5nsMODE to DCLKt h Hold Time 5.0 1.0nsMODE to DCLKt s Setup Time 5.0 4.5nsSDI to DCLKt h Hold Time 5.0 1.0nsSDI to DCLKt s Setup Time 5.011.5nsDCLK to PCLKt s Setup Time 5.012.5nsPCLK to DCLKt w Pulse Width 5.0 3.5ns6AC Operating Requirements(Continued)54ACTV CC T A=−55˚C Fig.Symbol Parameter(V)to+125˚C Units No.(Note8)C L=50pFGuaranteed MinimumPCLK HIGH orLOWt w Pulse Width 5.0 3.0nsDCLK HIGH orLOWNote7:Test load50pF,500Ωto ground.Note8:Voltage range5.0is5.0V±0.5V.CapacitanceSymbol Parameter Typ Units ConditionsC IN Input Capacitance 4.5pF V CC=OPENC PD Power Dissipation20pF V CC=5.0VCapacitance78Physical Dimensions inches(millimeters)unless otherwise noted28Terminal Ceramic Leadless Chip Carrier(L)NS Package Number E28A24Lead Slim(0.300"wide)Ceramic Dual-in-Line Package(D)NS Package Number J24F9Physical Dimensions inches(millimeters)unless otherwise noted(Continued)LIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-CONDUCTOR CORPORATION.As used herein:1.Life support devices or systems are devices or sys-tems which,(a)are intended for surgical implant intothe body,or(b)support or sustain life,and whose fail-ure to perform when properly used in accordancewith instructions for use provided in the labeling,canbe reasonably expected to result in a significant injuryto the user.2.A critical component in any component of a life supportdevice or system whose failure to perform can be rea-sonably expected to cause the failure of the life supportdevice or system,or to affect its safety or effectiveness.National SemiconductorCorporationAmericasTel:1-800-272-9959Fax:1-800-737-7018Email:support@National SemiconductorEuropeFax:+49(0)180-5308586Email:europe.support@Deutsch Tel:+49(0)180-5308585English Tel:+49(0)180-5327832Français Tel:+49(0)180-5329358Italiano Tel:+49(0)180-5341680National SemiconductorAsia Pacific CustomerResponse GroupTel:65-2544466Fax:65-2504466Email:sea.support@National SemiconductorJapan Ltd.Tel:81-3-5620-6175Fax:81-3-5620-617924Lead Ceramic CerpackNS Package Number W24C54ACT8188-BitDiagnosticRegisterNational does not assume any responsibility for use of any circuitry described,no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.。