单片微型计算机原理与接口技术：1) 用三种方法实现将累加器A内容改为20H 2) 将58H位单元置为1,观察内部R

Single Chip Micro-computer is called Single Chip for short,which is a typical Embedded Microcontroller Unit,and is usually abbreviated as MCU.MCU is more suitable to be used in embedded systems than dedicated processors,and it gets most of the applications.For an MCU,Reset Circuit is an essential part.No matter what kind of MCU we use,the design of its reset circuit is always revolved.Moreover,quality of the design will directly affect reliability of
the whole system.This article summarizes and gives an improve on the environments for use,the advantages and disadvantages of various reset circuits,with a good analysis for common uesd reset circuits.It also puts importance on the discussion of noise immunity and time limit of Single Chip reset circuits.In addition,it has proposed a degign of reset circuit,which is called "watchdog" and is based on common reset chips.
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