20
Pinouts and Signal Descriptions
3.3.15. General Purpose I/O (GPIO)
Signal
Pin
Description
I/O
PU/PD
Comment
GPO[0]
A93
General purpose output pins.
O 3.3V
PU 10K 3.3V
After hardware
RESET output
low
GPO[1]
B54
General purpose output pins.
O 3.3V
PU 10K 3.3V
After hardware
RESET output
low
GPO[2]
B57
General purpose output pins.
O 3.3V
PU 10K 3.3V
After hardware
RESET output
low
GPO[3]
B63
General purpose output pins.
O 3.3V
PU 10K 3.3V
After hardware
RESET output
low
GPI[0] A54
General purpose input pins.
Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
GPI[1] A63
General purpose input pins.
Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
GPI[2] A67
General purpose input pins.
Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
GPI[3] A85
General purpose input pins.
Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
3.3.16. Serial Interface Signals
Signal
Pin
Description
I/O
PU/PD
Comment
SER0_TX A98 General purpose serial port transmitter (TTL
level output)
O CMOS
PU 47K
5V
Power rail tolerance
5V/12V
PD shall be on the
carrier board
SER0_RX A99 General purpose serial port receiver (TTL
level input)
I CMOS
PU 47K
5V
Power rail tolerance
5V/12V
SER1_TX A101 General purpose serial port transmitter (TTL
level output)
O CMOS
PU 47K
5V
Power rail tolerance
5V/12V
PD shall be on the
carrier board
SER1_RX A102 General purpose serial port receiver (TTL
level input)
I CMOS
PU 47K
5V
Power rail tolerance
5V/12V
Содержание cExpress-KL
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