一种基于单片机控制的电梯语音报站器

ISD4004语音芯片是美国ISD公司推出的产品，具有无段长限制，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。本文介绍一种实用，新型、多功能电梯语音报站器，采用89C51单片机控制ISD4004语音芯片电路的即时播放。

A Device of Voice Floor-informer based on Single-Chip Microcomputer

ISD4004 is a phonetic chip produced by ISD company of America, It has many advantages including recording without length limit, recording and playing for many limes, using without expansion of the storage. The assistant circuit that the chip needs is simple and the time that the chip can store is long. This article introduces an applied, new style and multifunctional elevator voice floor-informer, which uses 89C51 single-chip microcomputer to control the circuits of phonetic chip ISD4004 informing at the real time.