W5200 (WIZ820io) module - No Data on MISO line


You are right.
but in case of RCR, this register have initial value as ‘0x08’.
RCR write the value after it read the value.

Please refer to the attached picture.(for example, 0x0001(GAR0))
This picture measure the SPI communication using oscilloscope about Read/Write operaion.

EK :slight_smile: