User's Manual

5 PIN definition

Pin name DI

Numbe

First Function(Note 1) Second function(Note

GND I

5,7,16,

32,33,3

435,36

Ground Same as left

GSM ANT I/O

6 Antenna feed point Same as left

VBAT I 2,3,4 Power supply Same as left

VCHG I 1 Battery Charging input port (DC 5V—7V) Same as left

System_reset

I 9 System reset pin(low level valid) Same as left

GPIO3 I/O

8 General purpose input or output port with pull

up 47K

KCOL4

PWRKEY I 10 POWER KEY(low level valid in 2 seconds) Same as left

SIMDAT I/O

11 SIM card data signal Same as left

SIMCLK I 12 SIM card clock signal Same as left

SIMRST I 13 General purpose input output Same as left

SIMVCC I 14 SIM card power supply(Need added C=100nF

to GND)

Same as left

VIO O 15 2.8V@100mA output DC voltage Same as left

GPIO45 I/O

18 General purpose input or output port with pull

down 47K

KROW7

URXD1 I/O

19 UART 1 data receiving port(for debug,

download S/W, AT command)

Same as left

UTXD1 I/O

20 UART 1 data transmitting port(for debug,

download S/W, AT command)

Same as left

UTXD2 I/O

21 UART 2 data transmitting port Same as left

URXD2 I/O

22 UART 2 data receiving port Same as left