Pcie; Uart3/Uart2; I2S/Sai - Pro Arduino ASX00031 Product Reference Manual

5.8 PCIe

Pin Function
1 TXN
2 RXN
3 CKN
4 GND
1 TXP
2 RXP
3 CKP
4 RST

5.9 UART3/UART2

Pins closer to the edge of the board are UART2. Pins closer to the center are UART3.
Pin Function
1 3V3
2
3
4 RTS
5 CTS
6 GND

5.10 I2S/SAI

Pin Function
1 3V3
2
3 WS
4 SD1
5 SD0
6 GND
1 3V3
2 SCK
3
4 D0
5 D1
6 GND
14 / 18
Type
Differential
Differential
Differential
Power
Differential
Differential
Differential
Digital
Type
Power
TX Digital
RX Digital
Digital
Digital
Power
Type
Power
CK Digital
Digital
Digital
Digital
Power
Power
Digital
FS Digital
Digital
Digital
Power
Arduino® Portenta Breakout Board
Arduino® Portenta Breakout Board
Differential PCIe Transmission Line Negative
Differential PCIe Receive Line Negative
Differential PCIe Clock Line Negative
Differential PCIe Transmission Line Positive
Differential PCIe Receive Line Positive
Differential PCIe Clock Line Positive
SAI Frame Synchronization
Description
Ground
Reset Signal
Description
+3.3 V power rail
UART Transmission Signal
UART Receive Signal
Request to send
Clear to send
Ground
Description
+3.3 V power rail
I2S Clock
I2S Word Select
I2S Right Channel
I2S Left Channel
Ground
+3.3 V power rail
SAI Clock
SAI Data Line 0
SAI Data Line 1
Ground
Modified: 14/02/2023