User's Manual

Smart Machine Smart Decision

SIM7100A_User Manual_V1.01 2014-12-11

3.9.1 Keypad Pin Description

Table 27: Keypad Pin description

Pin name Pin No. Function

KBC0 28

Sensing keys

KBC1 27

KBC2 31

KBC3 32

KBC4 36

KBR0 30

Driving pads

KBR1 29

KBR2 30

KBR3 35

KBR4 34

3.9.2 Keypad 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.

KBR4

KBR3

KBR2

KBR1

KBR0

KBC0

KBC1

KBC2

KBC3

KBC4

Figure 29: Reference circuit