SIM508 EVB User Guide
SIMCOM
4.2 Keypad
Figure 15: Keypad interface
Pin
Signal
I/O
Description
1 KCOL0 O
2 KROW0 I
3 KCOL1 O
4 KROW1 I
5 KCOL2 O
6 KROW2 I
7 KCOL3 O
8 KROW3 I
9 KCOL4 O
10 KROW4
I
Keypad array interface
11
GPIO32
I/O
GPIO32 reserved for user.
12 PWRKEY
I
power
on
key
13 GND
GND
14 VBAT
I
VBAT
SIM508-EVB_UGD_V1.01 Page 18 of 25
