I've got a microprocessor as SPI master and an AD1938 as slave. I have no answer from the AD1938. I've had a pull up 10k resistor on /CLATCH as requested by the datasheet. I try to write the register 0 and 1 second later read it.
I strobe the 4 lines of SPI from start to end pinout, nothing seems wrong. The data of MOSI are valid on the rising edge of the clock. is there something else wrong with the data of MOSI ?
thank you !