外文翻译--ISD4004语音芯片在语音报站器中的应用

外文翻译--ISD4004语音芯片在语音报站器中的应用 设计巴巴工作室www.88doc88.com ISD4004 voice chip voice stop in the browser application Abstract: ISD4004 voice chip series are the United States ISD introduced products, with multiple repeat playback, storage time, when used without the expansion of memory, peripheral circuits required for features such as easy. Introduced in the voice chip ISD4004 stop device in a practical application, and explains its function and use of methods, thus enabling readers to voice chip ISD4004 series use to have a preliminary understanding. Key words: ISD4004 single-chip voice stop browser ISD4004 voice chip ISD are from the United States launched the new products. On the voice chip pin description of the internal circuit, etc., it is easy in the ISD chip information provided by the company found, I will not describe too much, only a brief introduction to its characteristics make one. With ordinary recording / playback chip compared, ISD4004 has the following characteristics: First, the record does not sound paragraph length, and sound recordings do not need A / D conversion and compression; Secondly, as a fast flash storage medium, that is, without power supply data can be stored for up to 100 years, more than 10,000 duplicate records; In addition, ISD4004 has recorded a long time (up to 16 minutes, the paper used for the 8-minute ISD4004 voice chip) advantages; Finally, ISD4004 has required the development and application of peripheral circuits of the advantages of easy, This is evident from the introduction of this article reported that stations in the voice browser can be of practical application experience. Sound Station 1 hardware circuit design Currently on the market stop the flow of voice, and mostly not used ISD4004 series of chips, which were introduced not long ago, as well as its high price-related. However, with the number of applications, as well as ISD4004 price drop, coupled with the ISD4004 series of chips having the advantage, it is believed that the voice browser to use stop ISD4004 series voice chips are entirely feasible. I designed the device's hardware circuit, and a Board debug, and achieved satisfactory results. Figure 1 stop hardware circuit connection diagram This article discusses voice stop device is installed in the car means the playback circuit, does not include the recording circuit. In practical application, the recording circuit is completed stop the contents of the recording, and recorded content is stored into the voice chip. In this paper, combined with the ISD4004 playback circuit ISD4004 introduce the use of a typical application. This article discusses the browser stop main circuit mainly by single-chip microcomputer 89C52 and constitute ISD4004. This system is mainly divided into three parts: single-chip control of the playback part and display part. Display circuit used by P3.0, P3.1 to control the two paragraph 7 of the static digital tube display, and I shall not detail; control part constituted mainly by the 89C52 single-chip that contains the necessary keys circuit, reset circuit and peripheral circuits, such as watchdog circuit; playback from ISD4004 constitute some of the major, including supporting the PSA circuit, power amplifier circuit. 设计巴巴工作室www.88doc88.com From Figure 1 can be seen 89C52 and fewer connections between the ISD4004. MCU P1.0 ~ P1.3 pin access buttons, control devices stop the course of their work whether or not release the contents of tone playback; P1.6 access the ISD4004 chip select pin / SS, control whether ISD4004 strobe; ISD4004 then P1.7 serial input pin MOSI, read from the pin to the address of playback; P3.0 and P3.1 to control the external display circuit, in a newspaper, the course of their work station device displays the current number of stations; P3 .2 and P3.3, respectively, then ISD4004-pin serial clock SCLK and interrupt pin / INT. ISD4004 chips needed to connect audio signals are output pins AUDOUT, the pin through a filter capacitor connected with the speaker; AMCAP to automatically mute end, through the use of one grounded capacitor. In addition, because of the work of ISD4004 voltage 3V, while the single-chip supply voltage required for the 5V, therefore be necessary to adopt 3V voltage transformer circuit for use ISD4004. 2 Software Design Electric circuits, the first to complete the initialization procedure, and then query the status button to enter system standby mode. If you have press the button, then turn to the implementation of the key point to the work procedures. Keys including the playback button and stop button, plus 1 key, minus one key and special key words. In the standby mode, if the playback button is pressed the first time, the program will be the first to judge are or go back to (the general path of the bus are not only go further back), and the corresponding indicator light automatically read out the first stop playback of the content, Station No. 1 show. If it is not the first press, then the first station to determine the current number, and the station number is based on access to stored content playback at the station and the first address; then call subroutine playback, read access to the site in front of the contents of the first playback Address to begin playback. Each sentence after playback, ISD4004 interrupt pin (25 feet) will be automatically sent to one low-level signals. In hardware design, the pin and the MCU P3.3 connection, so will cause an interruption in the interruption subroutine, there is a disruption Record the number of counters, which determine when the end of the current Station 1, Station Plus together Refresh display. Add one button press, the procedures for the next shift playback content; minus one key press, after the process is turned on playback the content of one station, the corresponding station number display will also refresh; special language key press after the procedure to the implementation of the special language playback (for example, "turning Please note" and other statements); stop key press, would suspend the current playback status. ISD4004 in order to facilitate the readers understanding of the application, this paper some of the procedures. Part of the procedure to complete the main playback operation, to get the address of the content playback to the ISD4004, the completion of playback. PLAY ACALL POWERUP s ACALL DELAY25 f No later than 25ms CLR P1.6 4 设计巴巴工作室www.88doc88.com MOV PLAY2 Y MOV A 8 ACALL SEND ine call to send the address MOV A t ACALL SEND 设计巴巴工作室www.88doc88.com ISD4004语音芯片在语音报站器中的应用 摘要:，,,,,,,语音系列芯片是美国，,,公司推出的产品～具有可多次重复录放、存储时间长、使用时不需扩充存储器、所需外围电路简单等特点。介绍了，,,,,,,芯片在语音报站器中的一个实际应用～并说明了其功能和使用方法～从而使读者对，,,,,,,系列语音芯片的使用有个初步的了解。 关键词:ISD4004 单片机 语音报站器 ，,,,,,,语音芯片是由美国，,,公司推出的新产品。关于该语音芯片的引脚说明以及内部电路等～很容易在，,,公司提供的芯片资料中查到～笔者就不进行过多的描述～只简单地对其特点做一介绍。 与普通的录音,重放芯片相比～，,,,,,,具有如下特点:首先～记录声音没有段长度限制～并且声音记录不需要,,,转换和压缩,其次～将快速闪存作为存储介质～无需电源即可保存数据长达,,,年～重复记录,,,,,次以上,此外～，,,,,,,具有记录时间长,可达,,分钟～本文采用的为,分钟的，,,,,,,语音芯片,的优点,最后～，,,,,,,的开发应用具有所需外围电路简单的优点～这一点从本文介绍的其在语音报站器中的实际应用可以体会到。 , 语音报站器硬件电路设计 目前市场上流通的语音报站器～大多采用的不是，,,,,,,系列的芯片～这与其刚推出不久以及价格偏高有关。但随着，,,,,,,应用的增多以及价格的回落～再加上，,,,,,,系列芯片本身的优点～可以相信～在语音报站器中采用，,,,,,,系列语音芯片是完全可行的。笔者设计了该装置的硬件电路～并进行了上车调试～取得了较为满意的效果。 本文讨论的语音报站器主要是指装在车上的放音电路～不包含录音电路。而在实际应用中～录音电路则完成报站的录音工作～并收录内容存储到语音芯片中。本文主要结合，,,,,,,在放音电路中的使用介绍，,,,,,,的典型应用。 本文讨论的报站器主电路主要由单片机,,,,,和，,,,,,,构成。本系统主要分为三部分:单片机控制部分、放音部分和显示部分。显示电路采用的是通过,？(,、,？(,控制的两个,段数码管的静态显示器～在此不作详细介绍,控制部分主要由单片机,,,,,构成～包含必要的按键电路、复位电路和看门狗电路等外围电路,放音部分主要由，,,,,,,构成～包含配套的变压电路、功放电路等。 从图,中可以看出,,,,,和，,,,,,,之间的连接较少。单片机的,,(,，,,(？引脚接按键～控制报站器工作过程中是否放音和放音内容,,,(,接，,,,,,,的片选引脚,,,～控制，,,,,,,是否选通,,,(,接，,,,,,,的串行输入引脚,,,，～从该引脚读入放音的地址,,？(,和,？(,控制外围显示电路～在报站器工作过程中显示当前的站号,,？(,和,？(？分别接，,,,,,,的串行时钟引脚,,,,和中断引脚,，,,。，,,,,,,芯片所需要的连接还有音频信号输出引脚,,,,,,～该引脚通过一个滤波电容与扬声器连接,,,,,,为自动静音端～使用时通过一电容接地。此外～由于，,,,,,,的工作电压为？,～而单片机所需供电电压为,,～因此需要采用变压电路得到？,电压供，,,,,,,使用。 , 软件设计 设计巴巴工作室www.88doc88.com 电路上电后～首先完成程序的初始化～随后查询按键状态～进入系统待机状态。如果有按键按下～则转去执行该按键指向的工作程序。按键包括放音键、停止键、加一键、减一键以及特殊语键。在待机状态下～如果放音键首次被按下～程序将首先判断是去还是回,公交车路径一般是既去又回的,～并点亮相应的指示灯～自动读出第一站的放音内容～站号显示,。如果不是首次按下～则首先判断当前站号～并以该站号为依据获得存放该站放音内容的首地址,然后调用放音子程序～读入前面获得的本站放音内容首地址～开始放音。每一句放音完毕后～，,,,,,,的中断引脚,,,脚,会自动送一低电平信号。在硬件设计中～该引脚与单片机的,？(？连接～因此会引起一次中断～在中断子程序中有一个计数器记录中断次数～从而判断何时当前一站结束～站号加一并刷新显示。加一键按下后～程序放音内容转向下一站,减一键按下后～则使程序放音内容转向上一站～相应的站号显示也将随之刷新,特殊语键按下后～程序转向执行特殊语放音,譬如“拐弯请注意”等语句,,停止键按下～将中止当前的放音状态。 为了便于读者对，,,,,,,应用的理解～本文给出了部分程序。 该部分程序主要完成放音操作～把获得的放音内容的地址送到，,,,,,,中～完成放音。 ,,,, ,,,,, ,,,,,,, 上电子程序 ,,,,, ,,,,,,, 延迟子程序～至少延 迟,,,, ,,, ,,(, 选中，,,,,,, ,,, ,,,,,,,,,,,,,,, 存放,,,,,,,命令 ,,, ,,,,,, 送放音地址低,位 ,,,,, ,,,, 调用送地址子程序 ,,, ,,,,,, 送放音地址高,位 ,,,,, ,,,, 设计巴巴工作室www.88doc88.com