Digi NS9210 - Manual (Page 53)

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www.digiembedded.com 53
Pin allocation
SPI connector pins are allocated as shown:
Pin Signal
1 +3.3V
2 TXDA/SPI_TXD/GPIO7
3 RXDA/SPI_RXD/GPIO3
4 RTSA#/SPI_CLK/GPIO5
5 DCDA#/SPI_EN#/GPIO0
6 GND