推荐-ISD44语音芯片翻录器设计 精品
ISD-18101820语音录放贴片组件
ISD-1810/1820语音录放贴片组件ISD 系列语音录放组件,是应用目前技术最先进的美国ISD 公司单片语音处理大规模集成电路ISD 系列为核心,内含64K/128K EEPROM 存储器、消除噪声的话筒前置放大器和自动增益调节AGC 电路、适合语音的专用滤波电路、具有极高温度稳定性能的时钟振荡电路及全部语音处理电路。
它具有全贴片微型化、使用方便、语音任意录抹放、断电语音保存、微功耗、直推喇叭、音质与磁带效果相当等特点。
这种电路还提了多种应用方式选择和接口,并可方便地应用到各种集成化电子语音系统中。
ISD 系列语音录放组件可用于各种一段式语音留言装置、语音报警及语音提示装置中,能够在电源断开的情况下,长期保存信息,又可以随意更改录入的内容,整个体积小巧,厚度仅为9毫米,使用领域十分广泛,也极为方便。
一、特点◎单片语音录放电路,内含 EEPROM 存储器,永久性存储信息,可录放音十万次,存储可保留一百年◎易于使用,无需编程及开发系统,可随意改变录放内容上图为实例对比图,详见实物 ◎单电源5V 供电,具有自动节电功能◎直接普通驻极体话筒录音,直接8-16W 喇叭放音。
◎采用简易的手动控制方式,可选循环放音方式◎体积小巧,厚度仅为9毫米。
可以录音8-16秒.市面所见的产品中ISD1810和ISD1820是指同一个产品.只是商家操作才有了2个名字.二 、 引脚描述◆电源(VCC) 芯片内部的模拟和数字电路使用的不同电源总线在此引脚汇合,这样使得噪声最小。
去耦电容应尽量靠近芯片。
◆地线(VSSA, VSSD) 芯片内部的模拟和数字电路的不同地线汇合在这个引脚。
◆录音 (REC) 高电平有效。
只要REC 变高(不管芯片处在节电状态还是正在放音),芯片即开始录音。
录音期间,REC 必须保持为高。
REC 变低或内存录满后,录音周期结束,芯片自动写入一个信息结束标志(EOM),使以后的重放操作可以及时停止。
Mackie SR32
32-Channel Sound Reinforcement ConsoleS R 32•4-V L Z FeaturesLow noise/high headroom XDR™ (Extended DynamicRange) mic preamps with excellent RFI rejectionNew high-performance 2068 op-amps for incredibly low noise and distortionImproved cooling for even greater thermal protection 28 mic/line mono, and 2 stereo line channels True 4-bus designSolo, pan, and 16 kHz Air EQ on each submaster 6 individual aux sends per channel (2 pre, 2 post, 2 switchable pre/post)3-band swept midrange EQ on mic channels; 4-band fixed on stereo line channels 75 Hz low-cut filters on mic channelsMute, solo, signal present and OL LEDs on every channel 6 aux send masters with individual solos 4 stereo aux returns with EFX monitorSeparate Talkback section with mic preampDouble-bused sub outs for easy multi-track routing Balanced stereo TRS & XLR main outputs Balanced XLR mono output with level controlApplicationsLive sound mixing Multi-track recordingIntroductionTHE SR32•4-VLZ PRO is the latest update of our SR32•4sound reinforcement console, incorporating our ultra-high quality XDR™ (Extended Dynamic Range) mic preamps with the best RFI rejection of any sound reinforcement mixer design on the market.Like all of Mackie Designs’ mixers, the SR32•4-VLZ PRO is designed for rugged, 24-hour-a-day use. With its mul-tiple input/output configurations, true 4-bus architecture, 6 aux sends, and extensive routing capabilities, it can be used in a variety of live sound and recording applications. Its sturdy steel construction houses rugged, double-sided SMT-plated fiberglass circuit boards, and 60 mm faders with ultra-tight lip seals for keeping out dust and other contaminants. Impact-resistant knobs are mounted so they “ride” just above the steel chassis.The SR32•4-VLZ PRO has 28 mono mic/line input chan-nels, with XLR mic inputs and 1/4" TRS line inputs, and 2 stereo line input channels with 1/4" TRS inputs. All mono channels have TRS insert jacks (tip = send, ring = return). Each channel strip has an input trim, 6 aux sends (2 pre-fader, 2 post-fader, and 2 switchable pre or post), 3-band EQ with sweepable midrange (4-band EQ on the stereo chan-nels), pan control, and mute, solo, and bus assign switches. A 60 mm fader provides output gain for each channel. Twenty-eight XDR mic preamps provide high-headroom and low-noise. They are impedance-independent, so the frequency response remains constant whether the mic pre-amp is presented with an extremely high- or low-impedance load. Additionally, each channel has its own switchable low-cut filter (18 dB/octave @ 75 Hz).The mono channel EQs provide a range of ±15 dB at the following frequencies: 12 kHz shelving high-frequency EQ, 100 Hz to 8 kHz sweepable peaking mid-frequency EQ, and 80 Hz shelving low-frequency EQ. The stereo channels (21-24) provide ±15 dB of boost and cut at the following frequencies: 12 kHz shelving high-frequency EQ, 3 kHz peaking high-mid frequency EQ, 800 Hz peaking low-mid frequency EQ, and 80 Hz shelving low-frequency EQ.(continued on page 2)R E L A T E D P R O D U C T SSR24•4-VLZ PROCrosstalk(1 kHz @ 0 dBu, 20 Hz to 20 kHz bandwidth, channel in to Main Left outputs):Channel fader down, channels at Unity –89.5 dB Channel muted, channels 2-16 at Unity –88.7 dB Frequency Response(any input to any output):20 Hz to 60 kHz +0/–1dB 10 Hz to 100 kHz+0/–3dB Maximum LevelsMic preamp input +22 dBu All other inputs +22 dBu Balanced XLR outputs+28 dBu All other outputs+22 dBu ImpedancesMic preamp input 1.5 kΩAll other inputs >10 kΩAll outputs120 ΩEqualizationLo EQ Shelving 80 Hz +15 dB Mid EQ (mono ch) Peak 100 Hz-8 kHz +15 dB Hi EQ Shelving 12 kHz +15 dB Microphone PreampE.I.N. (150 Ω terminated, max gain)–129.5 dBm Power Requirements60 wattsPhysicalDimensions (HxWxD): 5.60" x 39.25" x 19.20"142.24 mm x 996.95 mm x 487.68 mm Net Weight: 32•4-VLZ PRO 40.7 lbs (18.8 kg)the left and right mains, 1/4" TRS line outputs for subs 1-4, and an XLR mono main output. The mono main out has its own level control, so a mono mix can be sent to another zone and adjusted accordingly.The Phones/Control Room switch and level control are connected to two stereo headphone outputs and the left and right Control Room output, allowing the stereo Tape Return, Left/Right Main Mix, and Solo to be monitored.A stereo playback device can be monitored via the Tape Return Inputs. Tape Return to Phones/C-R routes the tape playback signal into the monitor system and meters, and the Tape Return knob adjusts the level of playback, which can be monitored via headphones. Tape Return signals can also be assigned directly to the Main Mix. The SR32•4-VLZ PRO also has RCA-style Tape Outs for output to conventional stereo recording devices.Each of the six aux sends has its own individual master send control, driving 1/4" TRS output jacks. Six stereo aux returns are provided, with 1/4" TRS input jacks. Two aux returns can be folded back into Aux Sends 1 and 2 via their own volume controls to add effects in stage monitors.An XLR input is provided for a talkback mic, which can be assigned to the Main Mix or to Aux 1-2. The talkback mic has a level control in the talkback section.SR32•4-VLZ PRO TopSR32•4-VLZ PRO Rear PanelSR32•4-VLZ Pro DimensionsSR32•4-VLZ PRO Block Diagramswitches; and level indicating LEDs. The submix outputs shall each have level, pan, and “air” controls; solo and assign switches; and a bus access insert jack. The main outputs shall share a stereo master output fader and shall be fitted with insert jacks. Additionally, the mixer shall include a pre-fader/post fader solo function, a main monaural output with level control derived from the main stereo outputs, 6 monitor/effects send outputs, 4 stereo effects return inputs with switching and control functions, 1 stereo control room monitor output, 2 stereo headphone outputs, 1 set of stereo tape recorder conve-nience outputs, and 1 set of stereo tape monitor inputs.2. POWER SUPPLY.All necessary operating voltages for the mixer shall be provided by an internal power supply.3. INPUT CHANNEL CONNECTIONS. Each monau-ral channel (1-28) shall include an XDR™ (Extended Dynamic Range) electronically balanced microphone input, using an XLR-3-F-type connector, accepting nominal levels from –60 dBu to +4 dBu via a rotary Trim control. Phantom power shall be globally controlled via a rocker-type switch. Each monaural input channel shall also have an electronically balanced line level input, accommodating a nominal line level of between –10 dBV and +4 dBu, and appearing on the rear panel as a 1/4" TRS phone jack. Each stereo input channel shall have left and right electronically balanced line level input, accommodating a nominal line level of between –10 dBV and +4 dBu, and appearing on the rear panel as 1/4" TRS phone jacks. These jacks shall be fitted with internal switching contacts to accommodate monaural configura-tion. Additionally, each of the monaural input channels (1-28) shall offer an unbalanced insert connection, appearing on the rear panel as a 1/4" TRS phone jack.4. INPUT CHANNEL LEVEL AND ASSIGNMENT CONTROLS AND INDICATORS. Each monaural input chan-nel shall be equipped with a preamplifier gain control,a solo switch, a mute switch, three bus assignment ing equalizer with the knee set at 80 Hz and a range of +15 dB; a low-mid-frequency peaking equalizer centered at 800 Hz and a range of +15 dB; a high-mid-frequency peaking equalizer centered at 3.5 kHz and a range of+15 dB; and a high frequency shelving equalizer with the knee set at 12 kHz and a range of +15 dB.6. INPUT CHANNEL AUXILIARY SENDS. Each mixer input channel shall have 6 monaural auxiliary send con-trols. Two auxiliary send controls shall be fixed as pre-fader sends; two shall be fixed as post-fader sends; and two shall be switchable between pre-fader and post-fad-er. All auxiliary sends shall be post-mute switch.7. MAIN OUTPUT CONNECTIONS. The mixer shall have electronically balanced, line-level left and right main outputs, appearing on male XLR-3 type connectors and impedance balanced on 1/4" phone TRS jacks on the rear panel. Additionally, the main buses shall offer left and right unbalanced insert connections, appearing on the rear panel as 1/4" phone TRS jacks. Further, there shall be a main, electronically balanced, monaural output derived from the main stereo output, appearing as a male XLR-3 type connector on the rear panel. There shall be an output level control to adjust the main monaural output level.8. OTHER OUTPUT AND MONITORING CONNECTIONS. The mixer shall have the following impedance balanced line-level connections, appearing as 1/4" TRS jacks on the rear panel: submix bus outputs 1-4, also wired in parallel respectively to submix outputs 5-8; left and right control room monitor outputs, left and right tape monitor outputs, left and right tape monitor inputs. For conve-nience, the left and right main outputs (unbalanced) and the left and right tape monitor inputs shall also appear as RCA phono jacks on the rear panel. There shall also be two stereo headphone outputs on the rear panel of the mixer, carrying the control room monitor signals at levels and impedances proper for headphones. Each head-phone output connection shall be a stereo 1/4" jack.324 16220 Wood-Red Road NE, Woodinville, WA 98072 USA 888.337.7404,fax425.487.4337,****************Electronic files for this product available at: /installedThis Specification Sheet SR32VLZPRO_SS.PDF Owner/Operator’s Manual SRVLZPRO_OM.PDF CADD files SR32VLZPRO.DXF9. OUTPUT AND MONITORING CONTROLS AND SWITCHES. The mixer shall include one linear fader control for gain adjustment of main L/R outputs, covering a range from infinite attenuation to +10 dB above unity gain. A tape monitor switch shall alternately select either the main L/R outputs or the signal at the tape inputs as the source for the control room and headphones monitoring circuits. There shall be a stereo dual-channel rotary control for gain adjustment of the control room and headphone monitor output. The mixer shall have a stereo dual-channel control for adjustment of the monitoring level of the internal solo signals, and a light to indicate channel solo condition. The solo system shall be capable of switching between PFL (pre-fader listen) and AFL (after-fader listen––solo in place) operation.10. OUTPUT METERING. The mixer frame shall include two 13-segment LED meters each displaying a signal range from –40 dBU to +10 dBu, each with an additional LED indicating mixer clipping level at +22 dBu. The meters shall monitor the main left and right output channels; alternately, the meters shall monitor the tape return sig-nals when the tape monitor switch is depressed; or, the soloed input channel signals when the solo switch is depressed.11. AUXILIARY SEND CONNECTIONS. The mixer shall include impedance balanced, line-level outputs from the six auxiliary send buses, appearing on the rear panel as 1/4" TRS phone jacks.12. AUXILIARY RETURN CONNECTIONS. The mixer shall include 4 stereo auxiliary return inputs. Each auxiliary return shall have a left and a right balanced line-level input, accommodating a nominal line level of between –10 dBu and +4 dBu, and shall appear on the rear panel as 1/4" TRS phone jacks. The jacks shall be fitted with internal switching contacts to accommodate monaural configuration.13. AUXILIARY RETURN CONTROLS AND SWITCHES. The mixer shall include 4 dual-channel auxiliary return gain controls, each feeding the main stereo buses. Auxiliary returns 1-2 shall have their signals assignable to auxiliary send buses 1 and 2, respectively, through rotary level con-trols. Auxiliary return 4 shall be assignable to three differ-ent pairs of destinations, feeding either the main left and right buses or the submix buses.14. PHYSICAL CONFIGURATION. The mixer shall have a steel chassis frame painted grey-black and designed to rest on a horizontal surface. The SR32•4-VLZ PRO’s dimen-sions shall be 6.1" (155mm) high by 39.3" (997mm) wide by 19.2" (487mm) deep.15. SPECIFICATIONS. In addition to specifications previously cited, the mixer shall meet or exceed the fol-lowing specifications. Frequency response, microphone input to any output, 20 kHz to 60 kHz, +0 dB/ –1 dB; Total Harmonic Distortion (THD), any input to any output, 1 kHz @ +14dBu, 0.004%; Equivalent Input Noise (EIN), microphone input to insert send, –129.5 dBm; Common Mode Rejection (CMR), microphone input to insert send, maximum gain, 1 kHz, better than 90 dB; Typical Main Output noise, all channels assigned, odd channels panned left, even channels panned right, all faders down –94.7 dBu; Signal to Noise ratio, ref +4 dBu operating level, 90 dB; Attenuation, ref. 0 dB @ 1 kHz, Main Mix level con-trol down, –85 dBu; Channel Mute engaged, –84 dBu; Channel Gain control down, –83 dBu; Input impedance, microphone inputs, 1.5 k Ω; Channel Insert return, 2.5 k Ω; all other inputs, greater than 10 k Ω; Output impedance, Tape Out, 1.1 k Ω; All other outputs, 120Ω.16. DESIGNATION. The mixer shall be a Mackie Designs SR32•4-VLZ PRO.Mackie Designs continually engages in research related to product improvement. New material, pro-duction methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current Mackie product may differ in some respect from its published description, but will always equal or exceed the original design specifica-tions unless otherwise stated. ©1999–2002 Mackie Designs Inc. All rights Reserved. Mackie and the “Running Man” figure are registered trademarks of Mackie Designs Inc.。
信息技术类专业:毕业设计(论文)参考命题
17
工商注册公司管理系统
18
电脑应用软件查询系统
19
节能产品销售管理系统
20
汽车租赁管理系统
21
客房管理系统
22
水、电、煤气收费管理系统
23
电脑销售管理系统
24
大型超市管理系统
25
企业采购管理系统
26
教学设备管理信息系统
27
健身中心会员档案系统
28
音像租借管理系统
29
银行储户管理与结算系统
12
基于.NET技术的企业人事工资管理系统
13
基于.NET技术的在线教学系统
14
基于.NET技术的在线答疑系统
15
高校毕业生就业信息管理系统
16
基于流媒体格式的精品课程开发
17
虚拟音乐厅的实现
18
IC卡考勤系统的设计的实现
19
餐饮管理信息系统
20
汇市行情走势分析系统
21
学生学籍管理系统
22
文件管理系统
31
学生公寓管理系统
32
机票订购管理系统
33
医院收费管理系统
34
校园IC卡管理系统
35
实验室管理系统
36
基于.NET题库管理系统
37
社团管理系统
38
网吧收费管理系统
39
幼儿园管理系统
信息技术类专业毕业设计(论文)参考选题(F)
序号
毕业设计课题
适合
专业
系(部)
指导教师
职称
备注
1
多媒体课件制作的研究
2
个人事务助理开发(电子秘书)
iDste培训手册
培训资料深圳市艾迪思特信息技术有限公司目录第一章、基本概况了解 (3)一、认识iDste (3)二、iDste产品的型号定义及分类 (3)第二章、iDste智慧校园的主要解决方案 (10)2.1、iDste公司产品解决方案的优势 (10)2.2、iDste智能融合集控物联管理方案 (10)2.3、iDste校园数字广播及集控平台二合一智能融合方案 (14)2.4、iDste校园全数字高清业务、广播系统、远程管理平台三网合一融合系统 (14)2.5、iDste产品销售现场演示环节及销售工具准备 (16)第一章:基本概况了解一、认识iDste1、iDste的中文标准读法及字母所代表的含义中文写法“艾迪思特”读法“ai di si te ”英文字母含义“I do s omething to education”的第一个字母的拼写。
中文意思“我为教育做点事”。
2、iDste品牌的历史、定位及使命iDste品牌注册使用始于2008年,以”iDste”品牌注册的公司成立于2014年。
iDste 成立之初就将自身定位为一个为教育信息化提供优质产品及解决方案的公司,将“为教育做点实事”作为公司的历史使命,通过自身努力及持续创新能力以期成为业界最有责任心、最具专业性的一流企业。
3、iDste目前的产品及解决方案iDste目前具备NC、BC、BW、KC、BS、TM五大系列30多种产品。
解决方案涵盖校园设备集控、数字广播、高清视频信息发布、高保真扩音、多媒体教学等五大核心解决方案。
涉及包含物联网、数字业务融合、移动互联网、工业嵌入式等热点领域。
4、iDste的核心理念“做最负责任的企业、制造最稳定的产品、提供最专业的服务”就是iDste的核心理念。
5、iDste与合作伙伴合作的主体思想“真诚信任的可靠关系、富有激情的进取心、可持续的共赢格局”。
6、iDste产品及解决方案的优势是什么iDste产品本身体现“高品质高度集成+工业嵌入式CPU主核心设计”;解决方案体现“高度数字业务融合”;产品及解决方案体现“硬物联、软物联”的双重特色。
用ISD2500芯片实现的全自动语音介绍机
反射检测距离 , 顺时针调距离增大 , 逆时针调距离减小。T 0 D通过一条 15 X5 .m的双芯屏蔽线做为输
出引线 , 其中红色线为电源正极 , 白色线为输出端, 铜网接电源负极。白色线静态时为低电平 , 有反射
物时输 出高电平 。T 0 D工作稳定可靠 , 能优良, X5 性 可广泛应用于各种 自动检测 , 自动报警和 自动控
制等装置中。如 : 光电计数器 , 接近式照明开关 , 动干手器 , 控水龙头 , 自 自 感应门铃 , 倒车告警电路。
I : A 25 C3 L 44
T 0D 红 外 线反 射 开 关 X5:
图 1 自动 语音 介 绍机 原 理 电路
s 与 I 20 1 S 50的节电控制( D 端相连 , D P) 该端拉高可使芯片停止工作而进入节 电状态。当芯片 发生溢出( O F端输 出低 电平后 , 即 V 应将本端短暂变高以复位芯片 ;2 s 为录放模式控制开关 , 高电平
设 计 的全 自动 语 音 介 绍 机 的 工作 原 理 。
关键词 : D 5 O T 0 D、 I 20 、X 5 语音芯 片、 s 自动语音介绍机 中图分类号 :P 1 T 26 文献 标识码 : A 文章编号 :092 1 ( 06 0 — 04 0 10 —74 20 )4 07 - 2
停留在产品前方 , 介绍机会反复介绍产品性能 , 直到顾客离开 , 如果顾客只是从产品前方经过 , 因为停 留的时间较短小于 3 , s 自动语音介绍机不会工作。这样就能实现 自 动介绍的功能。
1 ID 50系列语音芯片 的功能特点 S 20
美国 I S D公司的 20 50芯片 , 按录放时间 6s7 s9 s 10 分成 I 26 、55 29 0、 、 和 2s 5 0 S 50 27 、 0和 2 10 D 5 52 共 4个品种。ID 5 0 S 20 系列和 10 40系列语音 电路一样 , 具有抗 断电、 音质好 , 使用方便 , 无需专用的 语音开发系统等相同优点。它的最大特点在于片内 E P O R M容量为 4 0 (40系列为 18 )所 以 8 K 10 2K , 录放时间长; 1 个地址输入端 (40系列仅为 8 ) 寻址能力可达 12 有 0 10 个 , 04位 ; 最多能分 60段 ; 0 设 有 O F 溢出) , V( 端 便于多个器件级语音介绍机是一种简单实用的电子产品 , 在产品的展示 、 销售等场合有广泛的应用前景 ;
基于89C52单片机的银行自动叫号系统
基于89C52单片机的银行自动叫号系统摘要:银行自动叫号系统是为解决排队公平等银行服务问题,提高银行办事效率而设计的智能排队管理系统。
在分析银行排队叫号需求的基础上,基于89c52单片机和isd4004语音芯片设计了银行自动叫号系统,并重点从主机和从机这两个部分探讨了银行自动叫号系统的设计。
关键词:自动叫号系统;银行排队系统;89c52单片机;isd4004语音芯片近年来,各行各业的信息化、智能化建设越来越普及,整个社会对各个行业的办事效率的要求也越来越高。
我国是人口大国,故办不少事情都会遇到”排队”这种令人头痛的问题。
例如像银行办业务,在顾客办业务过程中排队现象在所难免,严重时还常会伴随着如下嘈杂、无序、不公平、不合理、低效等影响银行企业形象的问题。
为了在排队时减少顾客的等待时间,为顾客办业务创造一个良好的环境,银行自动叫号系统应运而生。
本文拟在分析银行排队叫号需求的基础上,从主机和从机这两个方面来探讨基于89c52单片机和isd4004语音芯片的银行自动叫号系统的设计。
[1-3]一、银行自动叫号系统需求分析一般来说,银行自动叫号系统是为解决排队公平等银行服务问题,提高银行办事效率而设计的智能排队管理系统。
银行客户能够通过该系统进行下列活动:(1)客户排号取票。
客户根据需要办理业务的到取票机前依次排号,并获得系统打印的号票。
(2)客户休息等待。
获得系统号票的客户在休息区休息等待,并留意显示屏信息和语音提示。
(3)营业员按钮呼叫。
窗口操作员按”下一位”,窗口显示屏就显示客户的排队号,同时系统播放”请xx号到x号窗口办理业务”之类的语音提示。
(4)客户到窗口办理业务:休息区的客户听到语音提示就到相应窗口进行相关业务服务。
银行自动叫号系统所涉及到的对象活动具体如下:(1)顾客对象的活动。
顾客在取票机的界面上输入选择所需办理的相关业务。
界面将信息传递到控制业务逻辑的对象中心显示屏(动态显示所有等待服务的顾客号码以及相关的业务信息)进行验证,然后传递到窗口显示屏(显示顾客、业务受理员号码及宣传、服务用语)。
网友用的芯片总结
⽹友⽤的芯⽚总结⽹友⽤的芯⽚总结(整理版)⽹友在各⾃领域中所⽤到的芯⽚总结1.⾳频pcm编码DA转换芯⽚cirrus logic的cs4344,cs43344334是⽼封装,据说已经停产,4344封装⽐较⼩,⾮常好⽤。
还有菲利谱的。
8211等。
2.⾳频放⼤芯⽚4558,833,此⼆芯⽚都是双运放。
为什么不⽤324等运放个⼈觉得应该是对⾳频的频率响应⽐较好。
3.244和245,由于244是单向a=b的所以只是单向驱动。
⽽245是⽤于数据总线等双向驱动选择。
同时245的封装⾛线⾮常适合数据总线,它按照顺序d7-d0。
4.373和374,地址锁存器,⼀个电平触发,⼀个沿触发。
373⽤在单⽚机p0地址锁存,当然是扩展外部ram的时候⽤到62256。
374有时候也⽤在锁数码管内容显⽰。
5.max232和max202,有些为了节约成本就⽤max202,主要是驱动能⼒的限制。
6.⽹络接⼝变压器。
需要注意差分信号的等长和尽量短的规则。
7.amd29系列的flash,有bottom型和top型,主要区别是loader区域设置在哪⾥?bottom型的在开始地址空间,top型号的在末尾地址空间,我感觉有点反,但实际就是这么命名的。
8.164,它是⼀个串并转换芯⽚,可以把串⾏信号变为并⾏信号,控制数码管显⽰可以⽤到。
9.sdram,ddrram,在设计时候通常会在数据地址总线上加22,33的电阻,据说是为了阻抗匹配,对于这点我理论基础学到过,但实际上没什么深刻理解。
10.⽹卡控制芯⽚ax88796,rtl8019as,dm9000ae当然这些都是⽤在isa总线上的。
11.24位AD:CS5532,LPC2413效果还可以12.仪表运放:ITL114,不过据说功耗有点⼤13、⾳频功放:⼀般⽤LM36814、⾳量控制IC. PT2257/9.15.PCM双向解/编码 ADC/DAC CW669116.2.4G双⼯通讯 RF IC CC250017.cat809,max809,这些是电源监控芯⽚,当低于某⼀电压以后⽐如3.07v等出现⼀个100ms的低电平,实现复位功能。
LED显示语音播报系统
STB锁存信号:将移位寄存器的数据送到锁存器,并将其数据容通过驱动电路的前提必须是使能为开启状态。锁存信号也须要与时钟信号协调才能显示出完整的图象。在任何情况下,当锁存信号有异常时,会使整板显示杂乱无章。
EN使能信号:整屏亮度控制信号,也用于显示屏消隐。只要调整它的占空比就可以控制亮度的变化。当使能信号出现异常时,整屏将会出现不亮、暗亮或拖尾等现象。
2.1.2
单片机最小系统由以下几个部分组成[5]:
1、复位电路:为确保点单片机系统中电路稳定可靠工作,复位电路是必不可少的一部分。而单片机复位电路设计的好坏,直接影响到整个系统工作的可靠性。复位电路的作用是将系统进行复位,系统复位后可以解决“死机”、“程序走飞”等问题。
常见复位电路有上电复位跟手动复位2种,本设计采用手动复位。复位电路工作电压为5V,电阻采用10k电阻,电容使用10uf电容。平时与复位电路相连接的RST端口保持低电平,电源对电容充电。当复位按键按下,电容放电使RST端口电压变为高电平。当RST端口高电平保持时间大于2个机器周期(2us)时,系统电路会进行复位。
超声波盲人探路仪的设计
超声波盲人探路仪的设计摘要本文设计一种由74LS04反相器和CX20106搭接电路实现了超声波的发射与接收。
采用超声波发射与接受等技术,设计出盲人外出行走所需要提醒绕过前方障碍物的一种超声波探测器。
只需将超声波盲人探路器安装在盲人的拐杖上,当盲人在走路时前面有障碍物,拐杖上的盲人探路器就会发出报警声,因此起到提示的作用小心绕行。
并能语音播报离障碍物的距离,让盲人能够了解障碍物离自己的距离。
这种超声波盲人探路器使用方便可靠且价格低廉,适合盲人和老人夜间走路,能有效防止事故的发生, 盲人在外出时都会带一根拐杖来探路,以躲避障碍。
由于拐杖不可能太长,探测范围十分有限,利用超声波探测原理组成一个微型探测器并组装在拐杖手柄内,不仅可以提高探测效果和探测距离,而且使用十分方便。
【关键词】89C52 ;单片机;74LS04反相器CX20106电路;超声波的发射与接收;NY3P065AP8;语音芯片THE DESIGN OF THE ULTRASONIC BLIND LIGHTING APPARATUSAbstractIn this paper, the design of a 74LS04 inverter and CX20106 lap circuit achieves ultrasonic transmitter and receiver. Emitting and receiving ultrasonic technology, designed to remind the blind need to walk out in front of obstacles to bypass an ultrasonic detector. Just ultrasonic blind Pathfinder mounted on the blind cane, when there is an obstacle in front of the blind in walking, the blind Pathfinder crutches will sound an alarm on, and therefore play a role in prompting caution bypass. And can voice broadcast from the obstacle distance from obstacles so that blind people can understand their distance. This ultrasonic blind Pathfinder is reliable and easy to use and inexpensive, for the blind and the elderly to walk at night, can effectively prevent the occurrence of the accident, when the blind will go to Pathfinder with a crutch to avoid obstacles. Since crutches not be too long, the detection range is very limited, using ultrasonic detection principle to form a micro-probe and assembled in the cane handle, not only can improve the detection performance and detection range, and easy to use.【Keywords】89C52; SCM; 74LS04 CX20106 inverter circuit; ultrasonic transmitter and receiver; NY3P065AP8; voice chip目录摘要 (I)Abstract.......................................................................................................................................................... I I 目录 ............................................................................................................................................................ - 0 -第1章前言 .................................................................................................................................... - 1 -1.1系统开发背景..................................................................................................................... - 1 -1.2系统开发意义..................................................................................................................... - 1 -1.3设计目的............................................................................................................................. - 1 -第2章系统硬件电路的设计......................................................................................................... - 2 -2.1 主控芯片电路设计.................................................................................................................... - 2 -2.2 超声波测距电路设计................................................................................................................ - 3 -2.2.1 超声波发射电路设计............................................................................................................... - 4 -2.3 语音播报电路的设计.................................................................................................................. - 5 -2.4 蜂鸣器提醒电路的设计............................................................................................................ - 6 -第3章系统软件程序设计............................................................................................................. - 7 -3.1 超声波程序设计.......................................................................................................................... - 8 -3.2 语音播报程序设计...................................................................................................................... - 9 -3.3 蜂鸣器程序设计........................................................................................................................ - 10 -总结 ........................................................................................................................................................ - 11 -参考文献 .................................................................................................................................................. - 12 -附录 A ........................................................................................................................................................ - 0 -附录 B ........................................................................................................................................................ - 0 -致谢 ........................................................................................................................................................ - 5 -第1章前言1.1 系统开发背景蝙蝠能在完全黑暗中,以极快的速度精确地飞翔,从不会同前方的物体相撞,蝙蝠在飞行时,喉内产生并能从通过口腔发出人耳听不到的超声波,当遇到食物或障碍物时,超声波会反射回来,蝙蝠用两耳接受物体的反射波,并据此确定该物体的位置,并可从两耳分别接受到回波间的差别,来辨别物体的远近、形状及性质,蝙蝠在空中能利用超声波来“导航”,就能迅速准确捕捉飞虫。
毕业设计论文毕业设计公交车可视化语音报站
论文分类号: TP 学校代码: 13681毕业设计说明书(论文)题目: 公交可视化语音自动报站器的设计——主控STC12系列学生姓名:郭 璠 学 号: 2 6 1 1 1 0 2系 部: 信息工程 七系专业班级: 电 信1112班指导教师: 陈明泽 苏 婕二〇一四年四月Automatic Design of Converter Station Bus Visual Speech——MastercontrolSTC12 SeriesABSTRACTIn recent years , with the vigorous development of China's information industry , the standard of living and improve security awareness , people travel for the safety and convenience have created new demand . In addition to the bus-stop system and out of the station bus stop outside , how about to remind passengers to the front of the station names , as well as to those vulnerable groups effectively convey the station information to facilitate their travel , is also an important part of the smart -stop system .The design is mainly to address how easily and accurately instruct passengers arriving problem with the human voice simulation and forecasting stations reporting station , reported on the number of stations and station name and station name for text display and voice message recording station name selection control function. The system includes a microcontroller module , speech synthesis circuit , station number , station name display module , infrared interface circuit , reset circuit and power systems .STC12 microcontroller to control the use of speech synthesis chip and LCD modules . Speech synthesis chip SYN6288 , using simulated data is stored directly patented semiconductor memory technology , the upcoming analog voice data is written directly to a single storage unit , eliminate the need for A/D, D/A conversion , and therefore better able to reproduce the natural effects of real speech avoid the quantization noise and distortion generally solid voice circuits because quantization and compression caused . With LCD display , through the construction of model building simulation systems , access to relevant information related to the sensor and microcontroller combines knowledge , realization station V oice newspaper stand and display (LCD screen ) consisting stop system , give relevant sites , reminding prepare to enter the passenger to get off . Maximize the use of intelligent systems for efficient and convenient travel services , the system will give intelligent people to improve travel efficiency and improve environmental quality , it makes the system more practical newspaper stand .KEY WORDS:Single-chip Microcomputer , Audio Prompt , Bus-Stop Auto-Announce公交可视化语音自动报站器的设计——主控STC12系列摘要近些年来,随着我国信息事业的蓬勃发展,生活水平与安全防范意识的提高,人们对于出行的安全性和便利性都产生了新的需求。
Si4844 中文数据手册
Si4840/44 是第一代模拟调谐数字显示 CMOS 调幅 / 调频 / 短波无线电接收器集成
功能框图
Si484x Si4830/34
AMI AM ANT FM ANT RFGND LNA ADC AGC 0/90 ADC XTALI 2.0~3.6V VDD1/2 REG AFC CONTROL INTERFACE XTAL OSC SCLK SDIO IRQ RST BAND TUNE1/2 ADC DSP DAC ROUT DAC LOUT
描述
电路,集成了从天线输入到音频输出的完整接收器功能。芯片保持了模拟调谐功能 的同时,与主机MCU 一起工作,在LED 上可以显示频率、立体声 / 单声道等信 息。借助 SiliconLab 已证实并享有专利的数字低中频接收器架构, Si4840/44 提 供了卓越的射频性能和抗干扰能力。 集成于 Si4840/44 中的优越控制算法提供了方 便和可靠的控制接口,同时消除了传统解决方案中手动调谐外部元件的缺点。
Si4840/44-A10
广播模拟调谐数字显示调幅 / 调频 / 短波无线电接收芯片
特征
支持全球 FM 波段 (64–109 MHz) 支持全球 AM 波段 (504–1750 kHz) 支持 SW 波段 (Si4844 独有 )(2.3– 28.5 MHz) 可选择支持所有 AM/FM 区域波段 2 线控制接口 单声道 / 立体声,及有效台指示 数字音量支持 低音 / 高音支持
无需手动调整的最小 BOM 组件 卓越的真实世界性能 自动频率控制 (AFC) 依据 EN55020 标准 2.0 to 3.6 V 电源电压 (T = 25 °C), 可用两节 AAA 电池供电 支持广泛的铁氧体棒和空气环天线 24 引脚的 SSOP 外形封装 依据 RoHS 标准
泰登TMX-0404SDI2 4×4高清数字视频追踪矩阵切换器说明书
Professional Audio & Video Recorder for Conference TMX-0404SDI24×4 High Definition Digital VideoTracking Matrix SwitcherFeatures■Routing: 4×4 High Definition Digital Video Tracking Matrix Switcher■Video interface: BNC female■Data rates : 143 Mbps~2.97 Gbps■Compatible with SMPTE 259 M, SMPTE 292 M, SMPTE 344 M, SMPTE 424 M and DVB-ASI (270 Mbps)■Input equalization and clock recovery, output pre-emphasis■RS-232 control, supporting RS-232 protocols, for connection with central control system■Two RS-422 control port with built-in professional camera control protocols, a variety of professional cameras like TAIDEN HCS-3316HDB, SONY, PELCO and Panasonic can be controlled■One TAINET interface for connection with TAIDEN conference system■One RJ45 interface for TCP/IP connection■Power-off protection for scene status■LCD to display real-time operation■Front panel button control , easy to switch manually■Front panel keyboard lockup and protection function■Scene save and recall function■1U high, full rack widthTechnical SpecificationsVideoData rates 143 Mbps ~ 2.97 Gbps Data types 8 bit or 10 bit Compatible standards SMPTE 259 M, SMPTE 292 M,SMPTE 344 M, SMPTE 424M,DVB-ASI (270 Mbps) Video inputConnectors 4 × BNC female Input level 0.7 V - 1.2 Vp-p Input cable equalization Typical equalization cable length(RG60/ Ø1.0 mm standard cable)************(oddchannel)************(evenintegerchannel)************* Nominal level 0.8 Vp-p Impedance 75 Ohm Return loss 20~*****************Video outputConnectors 4 × BNC double-decker female Nominal level 0.8 V ± 7% Output level 0.5 V - 1.6 Vp-p Impedance 75 Ohm Return loss >***************** DC offset ± 100 mV with no offset at input Jitter 20~30 ps@HD/3G rate40~60 ps@SD rate Rise and fall time (20~80%) SD: 600 psHD/3G: 100 psControlTo central control system:COM (RS-232) RS-232, 9 pin female D connector COM1 Baudrate: 115200, data: 8 bits, stop: 1 bit, no parity RJ45 TCP/IP TAINET Baudrate: 19200, to main unit RS422 Baudrate: 9600, to dome camera RS232 Baudrate: 9600, to control keypadGeneral specsPower supply AC 100 V - 240 V, 50 Hz / 60 Hz Temperature Operating: 0 °C to + 50 °C;storage: -20 °C to + 70 °C Humidity Storage and operating: 10% to 90% Dimensions h × w ×d (mm) 43 × 483 × 208(1U high, full rack width) Weight 2.7 kg Color Gray (PANTONE 425 C) Mean time between failures 30,000 hoursOrdering InformationTMX-0404SDI2 4×4 High Definition Digital VideoTracking Matrix Switcher (SD/HD/3G)Tracking Matrix SwitcherFeatures■Routing: 8×4 High Definition Digital Video Tracking Matrix Switcher■Video interface: BNC female■Data rates : 143 Mbps~2.97 Gbps■Compatible with SMPTE 259 M, SMPTE 292 M, SMPTE 344 M, SMPTE 424 M and DVB-ASI (270 Mbps)■Input equalization and clock recovery, output pre-emphasis■RS-232 control, supporting RS-232 protocols, for connection with central control system■Two RS-422 control port with built-in professional camera control protocols, a variety of professional cameras like TAIDEN HCS-3316HDB, SONY, PELCO and Panasonic canbe controlled■One TAINET interface for connection with TAIDEN conference system■One RJ45 interface for TCP/IP connection■Power-off protection for scene status■LCD to display real-time operation■Front panel button control , easy to switch manually■Front panel keyboard lockup and protection function■Scene save and recall function■1U high, full rack widthTechnical SpecificationsVideoData rates 143 Mbps ~ 2.97 Gbps Data types 8 bit or 10 bit Compatible standards SMPTE 259 M, SMPTE 292 M,SMPTE 344 M, SMPTE 424M,DVB-ASI (270 Mbps) Connectors 8 × BNC female Input level 0.7 V ~ 1.2 Vp-p Input cable equalization Typical equalization cable length(RG60/ Ø1.0 mm standard cable)************(oddchannel)************(evenintegerchannel)************* Nominal level 0.8 Vp-p Impedance 75 Ohm Returnloss20~*****************Video outputConnectors 4 × BNC double-decker female Nominal level 0.8 V ± 7% Output level 0.5 V ~ 1.6 Vp-p Impedance 75 Ohm Return loss >***************** DC offset ± 100 mV with no offset at input Jitter 20~30 ps@HD/3G rate40~60 ps@SD rate Rise and fall time (20~80%) SD: 600 psHD/3G: 100 psControlTo central control system:COM (RS-232) RS-232, 9 pin female D connector COM1 Baudrate: 115200, data: 8 bits, stop: 1 bit, no parity RJ45 TCP/IP TAINET Baudrate: 19200, to main unit RS422 Baudrate: 9600, to dome camera RS232 Baudrate: 9600, to control keypadGeneral specsPower supply AC 100 V - 240 V, 50 Hz / 60 Hz Temperature Operating: 0 °C to + 50 °C;storage: -20 °C to + 70 °C Humidity Storage and operating: 10% to 90% Dimensions h × w ×d (mm) 43 × 483 × 208(1U high, full rack width) Weight 2.8 kg Color Gray (PANTONE 425 C) Mean time between failures 30,000 hoursOrdering InformationTMX-0804SDI2 8×4 High Definition Digital VideoTracking Matrix Switcher (SD/HD/3G)Tracking Matrix SwitcherFeatures■Routing: 8×8 High Definition Digital Video Tracking Matrix Switcher■Video interface: BNC female■Data rates : 143 Mbps~2.97 Gbps■Compatible with SMPTE 259 M, SMPTE 292 M, SMPTE 344 M, SMPTE 424 M and DVB-ASI (270 Mbps)■Input equalization and clock recovery, output pre-emphasis■RS-232 control, supporting RS-232 protocols, for connection with central control system■Two RS-422 control port with built-in professional camera control protocols, a variety of professional cameras like TAIDEN HCS-3316HDB, SONY, PELCO and Panasonic canbe controlled■One TAINET interface for connection with TAIDEN conference system■One RJ45 interface for TCP/IP connection■Power-off protection for scene status■LCD to display real-time operation■Front panel button control , easy to switch manually■Front panel keyboard lockup and protection function■Scene save and recall function■1U high, full rack widthTechnical SpecificationsVideoData rates 143 Mbps ~ 2.97 Gbps Data types 8 bit or 10 bit Compatible standards SMPTE 259 M, SMPTE 292 M,SMPTE 344 M, SMPTE 424M,DVB-ASI (270 Mbps) Connectors 8 × BNC female Input level 0.7 V ~ 1.2 Vp-p Input cable equalization Typical equalization cable length(RG60/ Ø1.0 mm standard cable)************(oddchannel)************(evenintegerchannel)************* Nominal level 0.8 Vp-p Impedance 75 Ohm Returnloss20~*****************Video outputConnectors 8 × BNC double-decker female Nominal level 0.8 V ± 7% Output level 0.5 V ~ 1.6 Vp-p Impedance 75 Ohm Return loss >***************** DC offset ± 100 mV with no offset at input Jitter 20~30 ps@HD/3G rate40~60 ps@SD rate Rise and fall time (20~80%) SD: 600 psHD/3G: 100 psControlTo central control system:COM (RS-232) RS-232, 9 pin female D connector COM1 Baudrate: 115200, data: 8 bits, stop: 1 bit, no parity RJ45 TCP/IP TAINET Baudrate: 19200, to main unit RS422 Baudrate: 9600, to dome camera RS232 Baudrate: 9600, to control keypadGeneral specsPower supply AC 100 V - 240 V, 50 Hz / 60 Hz Temperature Operating: 0 °C to + 50 °C;storage: -20 °C to + 70 °C Humidity Storage and operating: 10% to 90% Dimensions h × w ×d (mm) 43 × 483 × 208(1U high, full rack width) Weight 3.0 kg Color Gray (PANTONE 425 C) Mean time between failures 30,000 hoursOrdering InformationTMX-0808SDI2 8×8 High Definition Digital VideoTracking Matrix Switcher (SD/HD/3G)TMX-1604SDI216×4 High Definition Digital Video Tracking Matrix SwitcherFeatures■Routing: 16×4 High Definition Digital Video Tracking Matrix Switcher■Video interface: BNC female■Data rates : 143 Mbps~2.97 Gbps■Compatible with SMPTE 259 M, SMPTE 292 M, SMPTE 344 M, SMPTE 424 M and DVB-ASI (270 Mbps)■Input equalization and clock recovery, output pre-emphasis■RS-232 control, supporting RS-232 protocols, for connection with central control system■Two RS-422 control port with built-in professional camera control protocols, a variety of professional cameras like TAIDEN HCS-3316HDB, SONY, PELCO and Panasonic canbe controlled■One TAINET interface for connection with TAIDEN conference system■One RJ45 interface for TCP/IP connection■Power-off protection for scene status■LCD to display real-time operation■Front panel button control , easy to switch manually■Front panel keyboard lockup and protection function■Scene save and recall function■1U high, full rack widthTechnical SpecificationsVideoData rates 143 Mbps ~ 2.97 Gbps Data types 8 bit or 10 bit Compatible standards SMPTE 259 M, SMPTE 292 M,SMPTE 344 M, SMPTE 424M,DVB-ASI (270 Mbps) Video inputConnectors 4 × BNC female Input level 0.7 V - 1.2 Vp-p Input cable equalization Typical equalization cable length(RG60/ Ø1.0 mm standard cable)************(oddchannel)************(evenintegerchannel)************* Nominal level 0.8 Vp-p Impedance 75 Ohm Returnloss20~*****************Video outputConnectors 4 × BNC double-decker female Nominal level 0.8 V ± 7% Output level 0.5 V - 1.6 Vp-p Impedance 75 Ohm Return loss >***************** DC offset ± 100 mV with no offset at input Jitter 20~30 ps@HD/3G rate40~60 ps@SD rate Rise and fall time (20~80%) SD: 600 psHD/3G: 100 psControlTo central control system:COM (RS-232) RS-232, 9 pin female D connector COM1 Baudrate: 115200, data: 8 bits, stop: 1 bit, no parity RJ45 TCP/IP TAINET Baudrate: 19200, to main unit RS422 Baudrate: 9600, to dome camera RS232 Baudrate: 9600, to control cameraGeneral specsPower supply AC 100 V - 240 V, 50 Hz / 60 Hz Temperature Operating: 0 °C to + 50 °C;storage: -20 °C to + 70 °C Humidity Storage and operating: 10% to 90% Dimensions h × w ×d (mm) 43 × 483 × 208(1U high, full rack width) Weight 3.0 kg Color Gray (PANTONE 425 C) Mean time between failures 30,000 hoursOrdering InformationTMX-0404SDI2 16×4 High Definition Digital VideoTracking Matrix Switcher (SD/HD/3G)TMX-1608SDI216×8 High Definition Digital Video Tracking Matrix SwitcherFeatures■Routing: 16×8 High Definition Digital Video Tracking Matrix Switcher■Video interface: BNC female■Data rates : 143 Mbps~2.97 Gbps■Compatible with SMPTE 259 M, SMPTE 292 M, SMPTE 344 M, SMPTE 424 M and DVB-ASI (270 Mbps)■Input equalization and clock recovery, output pre-emphasis■RS-232 control, supporting RS-232 protocols, for connection with central control system■Two RS-422 control port with built-in professional camera control protocols, a variety of professional cameras like TAIDEN HCS-3316HDB, SONY, PELCO and Panasonic canbe controlled■One TAINET interface for connection with TAIDEN conference system■One RJ45 interface for TCP/IP connection■Power-off protection for scene status■LCD to display real-time operation■Front panel button control , easy to switch manually■Front panel keyboard lockup and protection function■Scene save and recall function■1U high, full rack widthTechnical SpecificationsVideoData rates 143 Mbps ~ 2.97 Gbps Data types 8 bit or 10 bit Compatible standards SMPTE 259 M, SMPTE 292 M,SMPTE 344 M, SMPTE 424M,DVB-ASI (270 Mbps) Video inputConnectors 16 × BNC female Input level 0.7 V ~ 1.2 Vp-p Input cable equalization Typical equalization cable length(RG60/ Ø1.0 mm standard cable)************(oddchannel)************(evenintegerchannel)************* Nominal level 0.8 Vp-p Impedance 75 Ohm Returnloss20~*****************Video outputConnectors 8 × BNC double-decker female Nominal level 0.8 V ± 7% Output level 0.5 V ~ 1.6 Vp-p Impedance 75 Ohm Return loss >***************** DC offset ± 100 mV with no offset at input Jitter 20~30 ps@HD/3G rate40~60 ps@SD rate Rise and fall time (20~80%) SD: 600 psHD/3G: 100 psControlTo central control system:COM (RS-232) RS-232, 9 pin female D connector COM1 Baudrate: 115200, data: 8 bits, stop: 1 bit, no parity RJ45 TCP/IP TAINET Baudrate: 19200, to main unit RS422 Baudrate: 9600, to dome camera RS232 Baudrate: 9600, to control keypadGeneral specsPower supply AC 100 V - 240 V, 50 Hz / 60 Hz Temperature Operating: 0 °C to + 50 °C;storage: -20 °C to + 70 °C Humidity Storage and operating: 10% to 90% Dimensions h × w ×d (mm) 43 × 483 × 208(1U high, full rack width) Weight 3.2 kg Color Gray (PANTONE 425 C) Mean time between failures 30,000 hoursOrdering InformationTMX-1608SDI2 16×8 High Definition Digital VideoTracking Matrix Switcher (SD/HD/3G)System Connection。
广州维创 WTV 系列语音芯片 说明书
2008.5系列语音芯片广州唯创科技有限公司地址:广东省广州市天河区棠东东路25号5楼8563855785638637E-mail:***************网址:◎脉冲不可重复触发◎下一曲不循环触发◎非电平保持可循环触发◎上一曲不循环触发◎电平保持不可循环触发◎下一曲可循环触发◎电平保持可循环触发◎上一曲可循环触发5、应用电路及简析设置芯片的各种控制模式、触发模式都可以使用电脑上位机软件和相关下载器简单完成。
⑴、按键控制模式按键控制模式下的应用电路如下图,由K1、K2、K3和K4四个按键控制触发内部存储语音的播放,一个按键能触发一段语音,也能连续的触发多段语音。
按键可以被设置为任何一种触发方式进行触发,电平触发时为低电平触发,脉冲触发时为负脉冲触发。
LED 可以被设置为放音高电平指示或放音低电平指示。
调节内置功放的外反馈电阻R2、R3能调整输出音量的大小。
由Q1、R8、R9和二极管组成上电复位电路,能有效的解决在电压波动大、外干扰信号强等恶劣环境下所造上的上电死机问题。
⑵、并口控制模式并口控制模式下应用电路如下图。
可以用MCU 对WTV 语音芯片进行控制操作,R10~R16为MCU 跟WTV 语音芯片的通讯电压平衡电阻,电阻的计算公式为(Vin-Vout)×700/Vout =Rn。
由MCU 发送地址直接触发WTV 语音芯片内部语音播放,最多可控制128段语音的播放。
1、芯片简介WTV 系列语音芯片是一款功能强大的一次性编程语音芯片,语音为6K 采样频率时,存储长度可分别达到40秒、80秒、170秒、340秒。
音频输出为PWM 或DAC 模式。
可选控制方式有按键控制模式、按键组合控制模式、并口控制模式、串口控制模式等。
按键控制模式的触发方式灵活;串口模式下可控制音量、打开或关闭功放、有循环播放和停止功能。
可应用在汽车防盗报警器、倒车雷达、GPS 导航仪、智能家居系统、家庭防盗报警器、医疗器械人声提示、娱乐设备(游戏机、游乐机)、学习模型(早教机、儿童有声读物)、智能交通设备(收费站、停车场)通信设备(电话交换机、电话机)、工业控制领域(电梯、工业设备)等领域。
ISD1420__语音接口芯片及其应用
放音子程序设计
放音编码地址表 主程序设计
10 26
[程序设计] 录音子程序——将“黄山……”语音录入
STARTR: MOV DPTR, #RTABAL MOV R7, #NN(1CH) NEXTR: CLR A MOVC A, @A+DPTR MOV 50H, A LCALL RECORD0 INC DPTR DJNZ R7, NEXTR RET RTABL: DB 40H,41H,42H,43H,44H,45H,46H (8040H) 黄 山 巍 巍 劲 松 翠 ………………
录音编码设计
录音子程序设计
录音编码地址表 放音编码设计 放音子程序设计
放音编码地址表
主程序设计 论: 各段语音存放在ISD1420由A7~A2决定的地址单元中; 各段语音的录音由录音编码RD=0、 PL=1和A7~A2决定; 各段语音的放音由放音编码RD=1、 PL=0和A7~A2决定; 录音编码/放音编码可以以表格的形式存放在各类存储器中; 编写相应的录音/放音子程序。
(1)放音子程序 PLAY:MOV DFTR, #7FFFH MOV A, #0FFH ;复位信号 MOV @DPTR,A MOV A, 40H ;放音地址及控制码由40H送A ACALL TIMA ;延时20MS MOVX @DPTR ,A ACALL TIMB ;延时放音时间 ;(单字时0.5s,词段时1.5s) MOV A,#0FFH ;停止放音 MOVX @DPTR,A
10
;保护现场
;复位信号
;放音地址及控制码由50H送A ;延时放音时间 ;(单字时0.5s,词段时1.5s)
声菲特-数字音频处理器
回声消除算法 AEC
采用子带算法,具有更少的MIPS消耗; 可设置的回声路径长度,可支持的最大回声脱尾高达512ms,适合在各种大、中、小型会议室 使用; 使用稳定的双方同时讲话(Double Talk)检测方法,即使在强背景噪声和非线性失真环境下也 有效,并且在双方同时讲话期间残余回声不会增加; 具有很强的鲁棒性,可以在所有可能的应用和环境下正常工作; 内嵌的噪声抑制算法可以消除噪声环境下的附加噪声; 变步长和后处理算法大大提高了收敛速度和终端扬声器非线性失真时的回声抑制比(ERLE)。
Adaptive
r(t)
filter
r(t)
x(t) S y(t)
x(t)
Microphone
12 / S-TRACK
AFC
AEC
ANC
AUTOMIXER
高效、全面 算法是完美音质的基础,更是工程师经验与智慧的结晶
反馈消除算法 AFC
多点滤波技术和多子带频移技术保持了原来基音周期的谐波性质,不会引起声音失真; 通过对房间反馈路径的声学建模,自适应的消除声学反馈; 可以快速跟踪反馈路径变化,使啸叫抑制的能力大大增强; 话筒传声增益提升可以提高传声增益6-18dB,大大增强了话筒增益,适合在各种大、中、小型 会议室使用。
INPUT 13 I 14 I 15 I 16
G
G
G
G
OUTPUT 5I6I7I8
G
G
G
G
INPUT 5I6I7I8
G
G
G
16X16
10 / S-TRACK
S-TRACK / 11
TIGER系列 . 算法精髓
far-end taker
u(t)
Loudspeaker
ISD4004芯片资料及看法
关于ISD4004的一些心得ISD系列语音芯片是美国ISD公司推出的产品。
该系列语音芯片采用多电平直接接模拟存储(Chip Corder)专利技术,声音不需要A/D转换和压缩,每个采样值直接存储在片内的闪烁存储器中,没有A/D转换误差,因此能够真实、自然地再现语音、音乐及效果声。
避免了一般固体录音电路量化和压缩造成的量化噪声和金属声。
ISD4004语音芯片采用CMOS技术,内含晶体振荡器、防混叠滤波器、平滑滤波器、自动静噪、音频功率放大器及高密度多电平闪烁存储阵列等(见图1),因此只需很少的外围器件就可构成一个完整的声音录放系统。
芯片设计是基于所有操作由微控制器控制,操作命令通过串行通信接口(SPI或Microwire)送入。
采样频率可为 4.0Hz、5.3Hz、6.4Hz、8.0kHz,频率越低,录放时间越长,而音质则有所下降。
片内信息存于内烁存储器中,可在断电情况下保存100年(典型值)反复录音10万次。
器件工作电压3V,工作电流25~30mA,维持电流1μA?单片录放语音时间8~16min,音质好,适用于移动电话机及其它便携式电子产品中。
1.1 引脚描述ISD4004系列芯片引脚图如图2所示。
二、引脚描述电源:(VCCA,VCCD) 为使噪声最小, 芯片的模拟和数字电路使用不同的电源总线, 并且分别引到外封装的不同管脚上, 模拟和数字电源端最好分别走线, 尽可能在靠近供电端处相连, 而去耦电容应尽量靠近器件。
地线:(VSSA,VSSD) 芯片内部的模拟和数字电路也使用不同的地线。
同相模拟输入(ANA IN+) 这是录音信号的同相输入端。
输入放大器可用单端或差分驱动。
单端输入时,信号由耦合电容输入, 最大幅度为峰峰值32mV, 耦合电容和本端的3KΩ电阻输入阻抗决定了芯片频带的低端截止频率。
差分驱动时, 信号最大幅度为峰峰值16mV,为ISD33000 系列相同。
反相模拟输入(ANA IN-) 差分驱动时, 这是录音信号的反相输入端。
电子宠物设计报告
从00处录音,则按以下时序:
1.发POWER UP命令;
2.等待TPUD(上电延时);
3.发POWER UP命令
4.等待2倍TPUD;
5.发地址值为00的SETREC命令;
6.发REC命令。
器件便从00地址开始录音,一直到出现OVF(存贮器末尾)时,录音停止。
ISD4004的SPI端口控制位:
示功能很有用。RAC脚和IAB位可用于信息管理。SPI端口简单框图如下:
ISD4004的SPI端口控制寄存器:SPI控制寄存器控制器件的每个功能,如录放、录音、信息检索(快进)、上电/掉电、开始和停止操
作、忽略地址指针等。
注:IAB置0时,录、放操作从A9-A0地址开始。为了能连贯地录、放到后续的存储空间,在操作到达该
行末之前,应发出第二个SPI指令将IAB置1,否则器件在同一地址上反复循环。这个特点对语音提
3、系统总体综合
四、软件实现
1语音模块
(1)语音程序设计思路C
(2)语言流程录放音及显示模块的程序段
(3)a、录音程序详解
b、放音程序详解
c、地址显示程序详解
2、显、综合规划
五、调试与包装
六、附录
一、设计要求
(1)电子宠物能按设定时间吃饭、睡觉、洗澡等(吃饭最少两次,一次最少吃5个食物)。
音质的优劣取决于ADC和DAC位数的多少。
ISD4004系列工作电压3V,单片录放时间8至16分钟,音质好,适用于移动电话及其他便携式电子产品中。芯片采用CMOS技术,内含振荡器、防混淆滤波器、平滑滤波器、音频放大器、自动静噪及高密度多电平闪烁存贮陈列。芯片设计是基于所有操作必须由微控制器控制,操作命令可通过串行通信接口(SPI或Microwire)送入。芯片采用多电平直接模拟量存储技术,每个采样值直接存贮在片内FLASH存贮器中,因此能够非常真实、自然地再现语音、音乐、音调和效果声,避免了一般固体录音电路因量化和压缩造成的量化噪声和"金属声"。采样频率可为4.0,5.3,6.4,8.0kHz,频率越低,录放时间越长,而音质则有所下降,片内信息存于FLASH存贮器中,可在断电情况下保存100年(典型值),反复录音10万次。
Sennheiser SR IEM G4 半机械式立体音频传输器说明书
FEATURES• Half-rack stereo transmitter in a full-metal housing with OLED display for full control• Easy and flexible wireless synchronization between transmitter and receiver via infrared• Compatible with Sennheiser WSM control software for flexible frequency allocation• Up to 16 compatible channels• Up to 42 MHz bandwidth with 1680 selectable frequen-cies, fully tunable in a stable UHF range• Transmission Range: up to 100 meters / 300 feet• High RF output power (up to 50 mW) depending on country regulations DELIVERY INCLUDES• SR IEM G4 stereo transmitter • rod antenna• power supply• GA 3 rackmount set• quick guide• safety guide• manufacturer declaration sheetHalf-rack stereo transmitter in a full-metal housing with OLED display for full control delivering clarity along the whole frequency spectrum for daily use on stage with evolution wireless G4 In Ear Monitoring systems.PRODUCT VARIANTSMade in GermanySR IEM G4-A1470 - 516 MHz Art. no. 507842 SR IEM G4-A516 - 558 MHz Art. no. 507843 SR IEM G4-GB606 - 648 MHz Art. no. 507844 SR IEM G4-G566 - 608 MHz Art. no. 507845 SR IEM G4-B626 - 668 MHz Art. no. 507846 SR IEM G4-C734 - 776 MHz Art. no. 507847 SR IEM G4-E823 - 865 MHz Art. no. 507848Assembled in USASR IEM G4-A1470 - 516 MHz Art. no. 508181 SR IEM G4-A516 - 558 MHz Art. no. 508182 SR IEM G4-AS520 - 558 MHz Art. no. 508183 SR IEM G4-G566 - 608 MHz Art. no. 508184 SR IEM G4-B626 - 668 MHz Art. no. 508185 SR IEM G4-C734 - 776 MHz Art. no. 508186 SR IEM G4-D780 - 822 MHz Art. no. 508187SPECIFICATIONSRF characteristicsModulation Wideband FM stereo(MPX pilot tone) Frequency ranges A1: 470 - 516 MHzA: 516 - 558 MHzAS: 520 - 558 MHzG: 566 - 608 MHzGB: 606 - 648 MHzB: 626 - 668 MHzC: 734 - 776 MHzD: 780 - 822 MHzE: 823 - 865 MHz Transmitting frequencies Max. 1680 frequencies,adjustable in 25 kHz steps20 frequency banks, eachwith up to 16 factory-presetchannels, no intermodula-tion6 frequency banks withup to 16 programmablechannelsSwitching bandwidth up to 42 MHzNominal/peak deviation±24 kHz / ±48 kHzMPX pilot tone(frequency/deviation)19 kHz/±5 kHz Frequency stability±10 ppmAntenna output BNC socket, 50 ΩRF output power at 50 Ωswitchable:Low: typ. 10 mWStandard: typ. 30 mWHigh: typ. 50 mWAF characteristicsCompander system Sennheiser HDXAF frequency response25 Hz to 15 kHzAF inputBAL AF IN L (I) + MONO/BAL AF IN R (II)2x XLR-3/¼" (6.3 mm) jackcombo socket, electroni-cally balancedMax. input level+22 dBuTotal harmonic distortion(THD)<0.9 %Signal-to-noise ratio (atnominal load and peakdeviation)>90 dBAF outputLOOP OUT BAL L (I)/LOOP OUT BAL R (II)¼" (6.3 mm) stereo jacksocket,balancedOverall deviceTemperature range-10 °C to +55 °CPower supply12 V DCCurrent consumption max. 350 mA Dimensions Approx. 202 x 212 x 43 mm Weight Approx. 980 gCONNECTIONSDIMENSIONSARCHITECT‘S SPECIFICATIONThe wireless stereo rack-mount transmitter shall be for use with a companion receiver as part of a wireless RF monitoring system.The transmitter shall operate within nine UHF frequency ranges, with a switching bandwidth of up to 42 MHz: 470 –516 M Hz, 516 – 558 M Hz, 520 – 558 M Hz, 626 – 668 M Hz, 734 – 776 M Hz, 780 – 822 M Hz, 823 – 865 M Hz, 566 – 608 MHz, 606 – 648 M Hz; transmitting frequencies shall be 1,680 per range and hall be tunable in 25 kHz steps. The transmitter shall feature 20 fixed frequency banks with up to 16 compatible frequency presets and 6 user banks with up to 16 user programmable frequencies.The transmitter shall be menu-driven with a backlit OLED display showing the current frequency, frequency bank and channel number, metering of AF level, transmission status, transmission power, equalizer setting, input sensitivity, and lock status. An auto-lock feature shall be provided to prevent settings from being accidentally altered.The parameters of associated receivers shall be configurable in the transmitter menu and synchronized with the receivers via an integrated infrared interface.Frequency stability shall be ±10 ppm. RF output power at 50 Ω shall be switchable between 10 mW (low), 30 mW (stan-dard) and 50 mW (high).The stereo audio input shall utilize two discrete (left/right) electronically balanced ¼" (6.3 mm) jack/XLR-3F combo sockets; the audio output shall utilize a balanced ¼" (6.3 mm) jack socket; an audio loop output shall be provided utilizing two balanced ¼" (6.3 mm) jack sockets. A headphone output with headphone volume control shall be provided and shall utilize a ¼" (6.3 mm) stereo jack socket. The transmitter shall have an Ethernet port (RJ-45) for remote network-based monitoring and control using the Sennheiser Wireless System Manager software. One 50 Ω BNC-type input socket shall be provided for connecting the antenna.Nominal/peak deviation shall be ±24 kHz/±48 kHz. The transmitter shall incorporate the Sennheiser HDX compander system and shall include a 19-kHz MPX pilot tone with a ±5 kHz deviation. The audio frequency response shall range from 25 –15,000 Hz. Maximum input level shall be +22 dBu. Total harmonic distortion (THD) at 1 mV and nominal deviation shall be < 0.9 %. Signal-to-noise ratio at nominal load and peak deviation shall be > 90 dB.The transmitter shall operate on 12 V power supplied from the NT 2-3 mains unit (for 100 – 240 V AC, 50/60 Hz). Power consumption shall be 350 mA. The transmitter shall have a rugged metal housing; dimensions shall be approximately 202 x 212 x 43 mm (7.95" x 8.35" x 1.69"). Weight shall be approximately 980 grams (2.16 lbs). Operating temperature shall range from −10 °C to +55 °C (+14 °F to +131 °F).The transmitter shall be the Sennheiser SR IEM G4.Sennheiser electronic GmbH & Co. KG · Am Labor 1 · 30900 Wedemark · Germany · 。
R-44中文资料
EDIROL R-44超乎想像的24bit/192kHz高清声音指标!体积轻巧!便于携带!4通道独立话放、4通道同时录音!
高精度四轨录音机
便携式 4通道录音机打消音质的顾虑44.1 k H z 192 k H z
超越CD品质4倍的采样频率!
SD存储卡可以录制更长的时间高清晰度,轻松可见!Linking to a PC
4通道录音功能现在已经浓缩到了手掌型录音机当中。
只需要一台R-44,你即可轻松实现4通道同时录音。
在装载了4节5号电池和1块SD存储卡的状态下,R-44的重量只有将近1.3公斤!R-44可以录制24bit/192kHz的声音,音质远远优于16bit/44.1kHz的CD。
R -44使用SD卡(支持SDHC卡)作为存储介质。
一块2G的SD存储卡可以录制超过2小时CD品质的声音文件。
通过4节5号碱性电池或镍氢电池连续录音4个小时。
户外录音完美实现!R-44的有机电解显示屏保证了高亮度、宽视角、快速屏幕响应。
无论在高亮度户外还是昏暗的音乐厅,都可以轻松察看R-44所有的编辑参数。
电平表反映快速,音量调整快速准确。
通过USB 2.0(高速)支持,只需一根USB 连接线就可以将R-44中的声音数据快速传输到电脑中。
这些声音数据可以通过R-44随机赠送的软件在电脑上进行播放。
* 有些PC电脑不支持24-bit声音文件的回放。
DECODER
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专利内容由知识产权出版社提供
专利名称:DECODER 发明人:ISHIKAWA TAKASHI 申请号:J P 14 780689 申请日:19890609 公开号:JPH0313088A 公开日:19910122
摘要:PURPOSE:To reduce edge business by setting a quantization representative value of a current frame to a value between the quantization representative value of the current frame and a preceding frame when the quantization representative value is adjacent to each other between frames. CONSTITUTION:When an adjacent representative value discrimination circuit 44 represents a quantization representative value in which a DPCM code Y1 of a current frame and a DPCM code Y1' of the preceding frame are adjacent to each other, the circuit 44 outputs logical H and in other cases, thel discrimination signal d1. A switch 50 is turned to the position of a contact (a) when the discrimination signal d1 is logical L and the switch 50 is turned to the position of a contact (b) when the discrimination signal d1 is logical H. Thus, when the DPCM code of the current frame and the DPCM code of the preceding frame represent adjacent quantization representative values, a decoded value taking its border as the quantization representative value is outputted and the same decoding as that of a conventional system is outputted in other cases. Thus, the edge business is considerably reduced.
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常州信息职业技术学院学生(毕业)设计()题目:ISD4004语音芯片翻录器设计()原创性声明和使用授权说明原创性声明本人郑重承诺:所呈交的(),是我个人在指导教师的指导下进行的研究工作及取得的成果。
尽我所知,除文中特别加以标注和致谢的地方外,不包含其他人或组织已经发表或公布过的研究成果,也不包含我为获得及其它教育机构的学位或学历而使用过的材料。
对本研究提供过帮助和做出过贡献的个人或集体,均已在文中作了明确的说明并表示了谢意。
作者签名:日期: -指导教师签名:日期:使用授权说明本人完全了解大学关于收集、保存、使用()的规定,即:按照学校要求提交()的印刷本和电子版本;学校有权保存()的印刷本和电子版,并提供目录检索与阅览服务;学校可以采用影印、缩印、数字化或其它复制手段保存;在不以赢利为目的前提下,学校可以公布的部分或全部内容。
作者签名:日期:()任务书专业计算机应用技术班级计应041 姓名一、课题名称:ISD4004语音芯片翻录器设计二、主要技术指标:1、项目包含硬件部分与软件部分2、硬件包括:ISD4004读写模块、录放模块、输入模块、功放模块、电源模块。
3、毕业符合规范三、工作内容和要求:1、系统分析、功能模块设计要求: 1) 描述系统应具备的功能;2)画出系统功能分析图3)描述每一模块的功能2、单片机硬件电路设计要求:1)根据系统功能分析的结果画出硬件电路模型图(草图)2) 根据硬件电路模型图画出原理图并布出PCB板,用制板机制出电路板3)在所制的电路上,焊接所需的元器件(同时在万能板上焊上所需的元器件,用于调试电路时用,这样可以减少设计成本)。
3、各功能程序设计要求: 1)跟据用户所需的功能,编写程序(在Keil uVision2编译环境下),主要以C语言为主,嵌入部分汇编语言。
2)思路清晰、各功能模块标明注释4、系统功能调试要求:1)画出实现每一功能的用例图2)设计实现这些功能用到的视图、宏或程序代码5、编著设计要求:1)中应含各项工作内容2)的最后一部分应含设计总结3)满足要求的字数、严禁抄袭四、主要参考文献:1、《Protel 99SE电路设计技术入门与应用》电子工业出版社2、《模拟电子技术》西安电子科技大学出版社3、《单片机高级语言C51Windows环境编程与应用》电子工业出版社学生(签名)年月日指导教师(签名)年月日教研室主任(签名)年月日系主任(签名)年月日()开题报告目录摘要关键词前言一、ISD4004 系列语音录放集成电路应用说明 (6)1、简述 (6)2、引脚描述 (8)3、SPI(串行外部接口) (10)4、时序 (13)5、典型应用电路 (15)6、电气参数 (18)二、低电压音频功放电路 (22)三、电路设计原理图 (28)四、电路设计PCB板 (30)五、源程序代码设计 (31)六、总结 (42)七、谢辞 (42)八、参考文献 (42)ISD4004语音芯片翻录器的研制吴玲玲摘要针对ISD语音芯片的特点,设计一种由单片机控制,能够循环录放的语音电路,可作为录音机,复读机、音频记录仪使用,既节省存储空间,又降低成本,具有较高的实用价值。
关键词:ISD4004 语音循环录放。
SummaryAim at the characteristics of the ISD speech chip, design a kind of from single slice machine control, can circulate to record to putof speech electric circuit be a tape recorder, replying to read machine,the audio frequency record instrument usage, since economical saving space, and then decline low cost, have higher practical value.Keyword:The ISD4004 speeches record to put circularly.前言ISD系列语音芯片是美国ISD公司推出的产品。
该系列语音芯片采用多电平直接接模拟存储(Chip Corder)专利技术,声音不需要A/D转换和压缩,每个采样值直接存储在片内的闪烁存储器中,没有A/D转换误差,因此能够真实、自然地再现语音、音乐及效果声。
避免了一般固体录音电路量化和压缩造成的量化噪声和金属声。
ISD4004语音芯片采用CMOS技术,内含晶体振荡器、防混叠滤波器、平滑滤波器、自动静噪、音频功率及高密度多电平闪烁存储阵列等,因此只需很少的外围器件就可构成一个完整的声音录放系统。
芯片设计是基于所有操作由微控制器控制,操作命令通过串行通信接口(SPI或Microwire)送入。
采样频率可为4.0Hz、5.3Hz、6.4Hz、8.0kHz,频率越低,录放时间越长,而音质则有所下降。
片内信息存于内烁存储器中,可在断电情况下保存100年(典型值)反复录音10万次。
器件工作电压3V,工作电流25~30mA,维持电流1μA?单片录放语音时间8~16min,音质好,适用于移动电话机及其它便携式电子产品中。
目前,市场上的固体录音机及各种录音笔,大多采用的是顺序录音,不具备循环录音功能,一旦存储器录满,必须重新操作才行。
本文设计一种能够循环录放的语音电路,即可解、上述问题。
一、ISD4004 系列语音录放集成电路应用说明1、简述◆单片8至16分钟语音录放、8、10、12及16分钟◆3V单电源工作◆工作电流2530mA,维持电流1uA◆高质量、自然的语音还原技术◆自动静噪功能◆无需开发系统◆内置微控制器串行通信接口◆多段信息处理◆不耗电保存信息100年(典型值)◆100000次录音周期(典型值)◆片内免调整时钟,可选用外部时钟ISD4004-10M 10分钟 6.4KHz 2.7KHz 2400 250ms 819.2KHz ISD4004-12M 12分钟 5.3KHz 2.3KHz 2400 300ms 682.7KHz ISD4004-16M 16分钟 4.0KHz 1.7KHz 2400 400ms 512KHzFigure: ISD4003 Series Black DiagramISD4004系列TSOP及PDIP、SOIC引脚如下:(和ISD4003系列相同)Figure 1: ISD4004 Series TSOP and PDIP/SOIC Pin outsISD4004系列工作电压3V,单片录放语音时间8至16分钟,音质好,适用于移动电话机及其它便携式电子产品中。
芯片采用CMOS技术,内含振荡器、防混清滤波器、平滑滤波器、自动静噪、音频放大器及高密度多电平闪烁存贮陈列。
芯片设计是基于所有操作由微控制器控制,操作命令通过串行通信接口(SPI或Micro wire)送入。
芯片采用多电平直接模拟量存贮技术,每个采样值直接存贮在片内的闪烁存贮器中,因此能够非常真实、自然地再现语音,音乐、音调和效果声,避免了一般固体录音电路固置化和压缩造成的量化噪声和多属声。
采样频率可为4.0,5.3,6.4,8.0KHz,频率越低,录放时间越长,而音质则有所下降,片内信息存于闪烁存贮器中,可在断电情况下保存100年(典型值)反复录音10万次。
2、引脚描述电源(VCCA,VCCD)为使噪声最小,芯片的模拟和数字电路使用不同的电源总线,并分别引到外封装的不同引脚上,模拟和数字电源端最好分别走线,尽可能靠近供电源处相连,而去耦电容应尽量靠近器件。
地线(VSSA,VSSD)芯片内的模拟和数字电路也使用不同的地线。
几个VSSA 尽量在引脚焊盘上相连,并用低阻通路连到电源上,VSSD也用低阻通路连到电源上。
这些接地通路要足以使VSSA与VSSD之间的阻值小于3Ω。
芯片的背面是通过衬底电阻连接到VSS的,在做COB时托盘须接VSS或悬空。
同相模拟输入(ANAIN+)这是录音信号的同相输入端。
输入放大器可用单端或差分驱动。
单端输入时,信号由耦合电容输入,最大幅度为峰峰值32mV,耦合电容和本端的3KΩ电阻输入阻挠决定了芯片频率的低端截止频率。
在差分驱动时,信号最大幅度为峰峰值16mV。
这两种戏动方式见下图反相模拟输入(ANAIN-)差分驱动时,这是录音信号的反相输入端。
信号通过耦合电容输入,最大幅度为峰峰值16mV,本端的标称输入阻挠为56kΩ,单端驱动时,本端通过电容接地。
两种方式下,ANAIN+和ANAIN-端的耦合电容值应相同。
音频输出(AUDOUT)提供音频输出,可驱动5KΩ的负载。
片选(SS)此端为低,即选中ISD4003B系列串行输入(MOSI)此为串行输入端,主控制器应在串行时钟上升沿之前半个周期将数据放到本端,供TER输入串行输出(MISO)TER串行输出端,TER末选中时,本端呈高阻态。
串行时钟(SELK)TER的时钟输入端,由主控制器产生,用于同步MOSI和MISO的数据传输。
数据在SCLK上升沿锁存到TER,在下降沿移出TER。
忠断(INI)本端为漏极开路输出,TER在任何操作(包括快进)中检测到EOM或OVF时,本端变低并保持。
中断状态在下一个SPI周期开始清除,中断状态也可用RITN指令读取。
OVF标志指示TER录放操作已到达存贮器的末尾。
EOM标志只在放音过程中检测到内部的EOM标志时,此状态位置1。
行地址时钟(RAC)漏极开始输出。
每个RAC周期表示TER存贮器的操作进行了一行(TE63480系列中的存贮器其2400行)。
8KHz采样频率的器件,RAC周期为200ms,其中175ms保持高电平。
低电平为25ms。
快进模式下,RAC218.75us 高电平,31.25us为低电平,该端可用于存贮管理技术外部时钟(XCLK)本端有内部下拉元件,芯片内部的采样时钟在出厂前已调校,误差在+1%内,商业级芯片在整个温度和电压范围内,频率变化在+2.25%内.工业级芯片在整个温度和电压范围内,频率变化为-6%+4%,此时建议使用稳压电源.若要求更高精度,可从本端输入外部时钟(如前表中所列).由于内部的防混淆及平滑滤波器已设定,故上述推荐的时钟频率不应改变。
输入时钏的占空比无关紧要,因内部首先进行了分频,在不外接时钟时,此端必须接地。
自动静噪(AMACP)当录音信号电平下降到内部设定的某一阈值以下时,1MF电容,构成内部信号电平峰值检测电路的一部分。
检测出的峰值电平为内部设定的阈值作比较,决定自动静噪功能的翻转点,大信号时自动静噪电路不衰减,静音时衰减6dB,1uF电容也影响自动静噪电路时信号幅度的响应速度,本端接VCCA则禁止自动静噪。