ADC driver: AD4940, The input signal used the single-end to convert full differentiation data.
V-logic : 3.3v
Vs+ : 5v
Vs- : 0v
I checked the SPI signal level measurement from MCU to AD7380 is fine.
But I don't understand the SDOA why the signal is not output.
How to verify AD7380 communication is works?
(SCK/SDIO signal data MCU to AD7380)
(SCK/SDOA no signal output, still lower level)
updated hardware info
[edited by: StevenChang at 2:24 AM (GMT -4) on 30 Mar 2021]