Application Guide - SimCom SIM5320AL User Manual

KEYPAD_0 30
KEYPAD_1 29
KEYPAD_2 30
KEYPAD_3 35
KEYPAD_4 34
3.7.2

Application Guide

All keypad pins can be configured for GPIOs. These GPIOs also support interruption operation if used as
input pins. A typical circuit about the keypad (5*5 keypad matrix) is shown in the following figure.
If these pins are configured for GPIOs, the sequence is listed in the following table.
Table 19: GPIO configuration
Keypad interface
KEYPAD_4
KEYPAD_3
KEYPAD_2
KEYPAD_1
KEYPAD_0
KEYSENSE_N4
KEYSENSE_N 3
KEYSENSE_N 2
KEYSENSE_N 1
SIM5320AL_User Manual_V1.01
Driving pads
Figure 26: Reference circuit
GPIO No.
GPIO6
GPIO7
GPIO8
GPIO9
GPIO10
GPIO11
GPIO12
GPIO13
GPIO14
39
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2014-08-20