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介绍了ISP(在系统编程)技术、P89LPC932单片机与ISP相关的特性,叙述了以ISP方式实现单片机系统软件升级的原理和具体实现方法。采用组合键方法使正常运行的单片机进行串口帧间隔检测初始化,上位机通过运行ZLGISP900从串口发出帧间隔信号,单片机检测到帧间隔信号后复位进入ISP状态,通过RS-232 C电缆以ISP方式实现单片机系统软件升级。给出了P89LPC932的ISP编程的具体实现电路和操作流程。
Introduces the ISP (in system programming) technology, P89LPC932 microcontroller and ISP related features, describes the ISP way to achieve the SCM system software upgrade principles and specific methods. Using the combination of keys to make the normal operation of the microcontroller serial frame interval detection initialization, the host computer by running ZLGISP900 issued from the serial frame interval signal, the microcontroller detects the frame interval signal reset into the ISP state, through the RS-232 C cable to ISP mode SCM system software upgrades. P89LPC932 ISP programming given the specific circuit and operation flow.