Shanghai Simcom Ltd. 0606020080117 Manual De Usuario
SIM345 EVB User Guide
SIM345-EVB_UGD_V1.02
15.02.2008
14
3 RXD1 O
Receive data
4 TXD1 I
Transmit data
5 DTR
I
Data Terminal Ready
6 CTS
O
Clear
to
Send
7 DSR
I
8
GPIO4
I/O
Transmit or receive data
9 RI
O
Ring Indicator
10 GPO1
O
Transmit
data
4.2 J102---KEY & POWER
Figure 13: J102 Interface
KEY & POWER Pin List
Pin
Signal
I/O
Description
1 COL0 O
2 ROW0 I
3 COL1 O
4 ROW1 I
5 COL
2 O
6 ROW2 I
7 COL
3 O
8 ROW3 I
9 COL
4 O
10 ROW4
I
Keypad array interface
11 CHG_IN
12 GND
I
13 VDD
14 VBATT I