... of GSM call connection mode; 9,100 M LAN integration; 10,170 pins, leads the CPU features available. See pin definition ... interface 8, RTC rechargeable battery; 9,5 V power input 10,10 keys, the layout of the phone; 11, reset button all ... , 1.5W speaker interfaces; 15, IIC ADC SPI Interface 16,10-bit code switch BOOT Stubbs; 17, SIM300 GPRS module interface 18 ...