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Pin
Signal
L1B
LAN2_ACTLED-
L3B
LAN2_LINK100#
2.3.9
40-pin GPIO (HAT40) (CN20)
Pin
Signal
1
3.3V
3
I2C2_DAT/ GPIO1
5
I2C2_CLK/ GPIO2
GPIO3
7
ANALOG_DATA1/ SPI3_TXD†
9
GND
UART_RTS/ GPIO4
11
ANALOG_DATA2†
GPIO5
13
ANALOG_DATA3/ SPI3_RXD†
GPIO6
15
ANALOG_DATA4/ SPI3_CS2†
17
3.3V
19
SPI1_TX/ GPIO7
21
SPI1_R/ GPIO8
23
SPI1_CLK/ GPIO9
25
GND
I2C1_DAT/ GPIO10
27
SPI3_CLK†
Chapter 2 – Hardware Information
Pin
Signal
L2B
LAN2_ACTLED+
L4B
LAN2_LINK1000#
2
5V
4
5V
6
GND
8
UART_TX/ GPIO16
10
UART_RX/ GPIO17
12
I2S6_BCLK/ GPIO18
14
GND
16
PWM3/ GPIO19
18
I2S2_SDO/ GPIO20
20
GND
22
I2S2_BCLK/ GPIO21
24
SPI1_CS0/ GPIO22
26
SPI1_CS1/ GPIO23
I2C1_CLK/ GPIO24
28
SPI3_CS0†
15
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