Orin SPI output level 3.3v?

L4T version:R35.1.0
使用jetson-io配置orin spi,实出波形的电平是3.3v,并且速率设置超过40M后波形失真较为严重且与实际设置速率值有较大偏差,请问如何控制波形不失真并且达到65M的最大速率。
Many thanks


Hi taylor_quan,

Are you using the devkit or custom board for AGX Orin?

Could you send/receive the data with 65M?

Are you testing on the SPI port of 40-pin header? If so, please read 40-pin header doc as there are some requests on the load of the pin.

是的,是AGX Orin devkit,速率设置50M测到的波形实际输出只有44M


Could you help to provide the result of the following command?

#cat /sys/kernel/debug/bpmp/debug/clk/spi1/max_rate
#cat /sys/kernel/debug/bpmp/debug/clk/spi1/parent
#cat /sys/kernel/debug/bpmp/debug/clk/spi1/pto_counter
root@smartsens-desktop:/home/smartsens# cat /sys/kernel/debug/bpmp/debug/clk/spi1/max_rate
root@smartsens-desktop:/home/smartsens# cat /sys/kernel/debug/bpmp/debug/clk/spi1/parent
root@smartsens-desktop:/home/smartsens# cat /sys/kernel/debug/bpmp/debug/clk/spi1/pto_counter


Hello Trumany,

I am using a custom board(Jetson Orin RTSO-1002) recognized by Nvidia. It has 60 pins.
1)How to configure the SPI pins?
2)Is there a Jetson IO routine for the 60 pin version as well?


Please use pinmux spreadsheet to configure these pins for SPI usage.

Sorry, Jetson-IO is only available for devkit from NVIDIA.
You could use spreadsheet to configure pinmux for custom board.

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