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AFE4960: AFE4960 spi communication problem

Part Number: AFE4960

Hi, Dear.
I have a question regarding AFE4960 SPI Interface.
ECG is using AFE4960, and MAIN MCU is using Qualcomm chip.
To measure the EEG waveform, SPI communication is required, but communication is not working.
If I use a chip other than the MCU on the EVM board, is it only I2C interface, not SPI interface?