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