Gpio; Keypad Interface - Sunsea AIoT SIMCom SIM5800 Hardware Design

ISINK1
ISINK2
ISINK3

4.17 GPIO

SIM5800 default provides 16 GPIO pins. All GPIOs can be configured as inputs or outputs, pull-up or pull-down.
The GPIOs are shown following table:
Table 19: GPIO interface definition
Pin name Pin No.
GPIO69
GPIO11
GPIO12
GPIO65
GPIO18
GPIO19
GPIO20
GPIO21
GPIO84
GPIO83
GPIO82
GPIO81
GPIO1
GPIO0
GPIO3
GPIO2
GPIO has multiplex function, customers can use it as needed, please refer to the detailed list of multiplex function
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4.18 Keypad interface

Module support button function, software default Keypad mode, No recommended to used GPIO interrupt mode
to detect the keypad.
The module has the following three pins that can be used as the keypad:
SIM5800_Hardware Design_V1.01
Smart Machine Smart Decision
103
102
101
Module
ISINK0
.
.
.
ISINK3
Figure 34: ISINK reference ciruit
Default status
90 Pull down
93 Pull down
94 Pull down
96 Pull down
97 Pull down
98 Pull down
99 Pull up
100 Pull down
106 /
107 /
108 Pull down
109 Pull down
116 Pull down
117 Pull down
118 Pull down
119 Pull down
4~24 4
4~24 4
4~24 4
VBAT VBAT
Default function
KPROW0
GPIO
GPIO
KPROW1
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
41
mA
mA
mA
2018-10-08