The Design of Household Intelligent Emergent Call System
Abstract
This paper mainly recommends a system about MT8888CE, which is for DTMF signal coding and is based on STC89SC2RC. Base on the brief of CPU’s controlling the telephone to automated ring system. And the whole circuit is in the status of awaiting opportunity. Once the key-press is touched off, the CPU will immediately go to the software to make the CMOS chip of MT8888CE for DTMF signal coding ring the correspond number which has already been input in the CPU. And then the ISD1420 output the voice to notice the helping department. The system can be parallelly connected with ordinary telephone, and could meet the needs of particular people in emergency. Have realized the request designed basically through the experiment. Have introduced the design of the software and hardware and debugging course systematically in detail in the article.