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6.2.5
GPIO
All General Purpose I/O (GPIOs) shall be initialized to proper direction / output logic level as soon as possible. If
supply is removed from external device, relevant GPIOs should be placed at low logic level, or decoupled.
Name
PIN #
I/O
I/O type
Description
GPIO_27
I2S1_CLK0
GPIO_25
GPIO_102
GPIO_93
I2S1_RX
GPIO_94
I2S1_TX
GPIO_95
I2S1_WAO
1
2
3
4
5
6
7
8
9
10
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
KEYOUT0
40
I/O
Generic digital signal
KEYOUT1
42
I/O
Generic digital signal
KEYOUT2
44
I/O
Generic digital signal
KEYOUT3
KEYOUT4
KEYOUT5
46
48
50
I/O
I/O
I/O
Generic digital signal
Generic digital signal
Generic digital signal
KEYIN0
52
I/O
Generic digital signal
KEYIN1
54
I/O
Generic digital signal
KEYIN2
56
I/O
Generic digital signal
KEYIN3
58
I/O
Generic digital signal
CAP19
CAP02
CAP05
CAP06
GPIO_24
GPIO_30
GPIO_23
GPIO_26
GPIO_91
GPIO_96
GPIO_92
60
62
64
66
72
74
76
77
78
79
80
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
Generic digital signal
GPIO 27
I2S1_CLK0
GPIO 25
None
GPIO 93
I2S1_RX
GPIO 94
I2S1_TX
GPIO 95
I2S1_WAO
Keypad output pin 0 /
GPIO 07
Keypad output pin 1 /
GPIO 08
Keypad output pin 2 /
GPIO 09
GPIO 10
GPIO 18
GPIO 19
Keypad input pin 0 /
GPIO 00
Keypad input pin 1 /
GPIO 01
GPIO 02
Keypad input pin 3
/ GPIO 03
GPIO 53
GPIO 50
GPIO 90
GPIO 88
GPIO 24
GPIO 30
GPIO 23
GPIO 26
GPIO 91
GPIO 96
GPIO 92
In the case that 60-pin board-to-board connector is mounted the number of available GPIOs interfaces is 13.
In the case that USB port is not supported then the number of GPIO interface will be 33. In this case pins usually
dedicated to USB port are used as GPIO interfaces.
25