My SPI GPIO of jetson nano is different with others

[lululu991129]

Hello, I have a mess.
Why my SPI_MISO is in pin 19. But usually It should in pin 21.

Follow is mine.

[KevinFFF]

Hi lululu991129,

Are you using the devkit or custom board for Jetson Nano?
What’s your Jetpack version in use?

I’ve check our spec and SPI0_MISO(din) should be at PIN21 of 40-pin expansion header

PIN19 is SPI0_MOSI(dout).

@lululu991129

Why my SPI_MISO is in pin 19.

Why you said SPI_MISO is PIN19?

[lululu991129]

Hi KevinFFF,
Because as follow picture shows, my pin19 is spi1_dout. Does it mean spi_miso?

[KevinFFF]

@lululu991129

my pin19 is spi1_dout. Does it mean spi_miso?

No, it means SPI_MOSI.

The input/output here is in the perspective of SPI master.
So the relation is like the following:
din → input → MISO
dout → output → MOSI

[lululu991129]

Oh, I see. Thank you so much.