Pin Symbol Type
Description
D20
ʳ
GPIO0
I/O, 5V
Multiple function
(1) Serial interface control line
(2) Slave I2C clock
(3) External Interrupt 3
(4) GPIO
E18
ʳ
GPIO1
I/O, 5V
Multiple function
(1) Serial interface data line
(2) Slave I2C data
(3) External Interrupt 3
(4) GPIO
C22
ʳ
GPIO2
I/O, 5V
Multiple function
(1) Video output DE signal
(2) 2nd RS232 TX
(3) External Interrupt 1
(4) Slvae I2C clock
(5) PWM control signal output
(6) Ethernet Speed LED
(7) GPIO
AA5
ʳ
GPIO3
I/O, 5V
Multiple function
(1) Audio line input data
(2) 2nd RS232 RX
(3) External Interrupt 2
(4) Slvae I2C data
(5) PWM control signal output
(6) Ethernet Link LED
(7) GPIO
AA4
ʳ
GPIO4
I/O, 5V
Multiple function
(1) Microphone input data
(2) 2nd RS232 TX
(3) External Interrupt 4
(4) Slvae I2C clock
(5) PWM control signal output
(6) Ethernet Activity LED
(7) GPIO
AB1
ʳ
GPIO5
I/O, 5V
Multiple function
(1) Microphone input left-right clock
(2) 2nd RS232 RX
(3) External Interrupt 1
(4) Slvae I2C data
(5) PWM control signal output
(6) Ethernet Duplex LED
(7) GPIO
9-17
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