LPC900 系列单片机 ISP下载模式外围硬件三个脉冲触发源程序 产生脉冲芯片为AT89c2051 晶振11.0592 电路图可参考ZLG网站的ISP线下载说明。-LPC900 series of single-chip ISP to download the three-pulse mode the external hardware trigger source for the chips have a pulse circuit AT89c2051 crystal 11.0592