User's Manual

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