... layer; 2, size is only 6 * 6cm; 3, Single-supply 3.7-6.5V; The S3C6410 processor, 4,800 ... USB HOST interfaces; 2, USB Device Interface 3 way 232, 3-way TTL serial port; 4,100 M network ... 11, reset button all the way 12, Two LED lights, LED lights the way directed; 13, Camera Interface 14, headphone ... ; 15, IIC ADC SPI Interface 16,10-bit code switch BOOT Stubbs; 17, SIM300 GPRS module interface 18 ...