sc6600m原理图，SC6600M外围接口设计,包括显示，音频、键盘、SD卡、SIM卡接口电路、基带接口电路！-the sc6600m schematics, SC6600M peripheral interface design, including display, audio, keyboard, SD card, SIM card interface circuit, baseband interface circuit!

sim卡原理图、Altium designer打开(Sim card schematic, altium designer opens)