Low-power High-reliability Hardware And Software Design Of The Walkie-talkie

I research and design a embedded system based on TMP86C820 in this papers. I am in the charge of the software and the hardware except for radio part, among that there are much ways for reliability and low power of system. At the beginning, I study the operating principle, performance index and typical function of communication terminal equipment PMR. Real-time design that is a means for electronic system design is introduced after operating principle illustrated. During making specific rounded scheme, I have selected MCU TMP86C820 with high performance, low cost and good development tools, other IC CMX808A, TB31202, KA8507B, LM386, RT178, KMZ52 , etc. On the hardware design side, all function blocks based on IC are designed through the signal and control, on the center MCU. There are minimum MCU system, MMI blocks, system power supply block, audio processing block, frequency synthesized block and electronic compass. On the hardware design side, all function modules fulfill the needed functions of system. The main loop body and task-arrangement module make a connection for other modules. Whole designing, the reliability and low power are be considered, among which uncoupling, filtering, insulating and data filtering are used. so this system meet the challenge of functions, reliability, low power and low cost, which there is competitive power. Lastly, a little thinking for new use of system is showed at software flexibility part.