nRF52833 SPI power too low

[yolee599]

Hi, When I test the SPI with extern flash W25Q64, The SDK default configuration seems to be too low powe, After SPI initialization is complete, The GPIO drive is configured as "S0S1", I had to reconfigure the GPIO drive to "H0H1".

The flash device from Winbond. The SDK version is nRF5_SDK_16.0.0.

[awneil]

yolee599 said:

The SDK default configuration seems to be too low powe

How do you determine that?

[yolee599]

I try to read the chip device ID, Not reconfiguring gpio, the read failed, But after reconfiguring gpio, It is successful.

[awneil]

You really need to use an oscilloscope to see what's actually happening on the wires - that will show you if there's any signal level issues ...