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Application of ISP Technology to Software Update of MCU

LU Cuixia

Abstract

This paper introduces ISP technology,the ISP characteristics of P89LPC932 MCU,and discusses particularly the principle and realization methods of MCU application software update using ISP mode.In this system,when the combination key is pressed,the MCU application software runs serial port frame interval detection subprogram.The frame interval signal is sent from PC serial port on which ZLGISP900 is running,then when MCU detects the signal,a reset of MCU happens and then MCU comes into ISP mode,so the MCU application software can be updated through RS232 cable connection between PC and MCU.In this paper,the realization circuit and operation flow of P89LPC932 ISP mode programming is given in detail.

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Available abstract

Key concepts: Microcontroller, Serial port, Software, Reset (finance), Computer hardware, Embedded system, Frame (networking), Realization (probability)