使用EMC78P153S单片机实现手机一机三卡切换的ASM程序,注释中说明了电路连接方法,其中巧妙之处在于利用外部时钟控制芯片的休眠节(切换时用104电容维持供电).-EMC78P153S MCU use a phone card for three to switch the ASM procedure, Notes note of the circuit connection method, The trick of which lies in the use of an external clock control of the dormant chip Festival (with 104 switching capacitor to maintain electricity).