Duncan, Can you confirm that you have followed this procedure from pg 44 of the datasheet?: 5. Demodulator register readout follows the following procedures: – Write '1' to register 0x0[1]; pin SPI_DIG_EN should be '0' while writing. This is the readout enable register for demodulator. – Write '1' to register 0x0[1], pin SPI_DIG_EN should be '1' while writing. This is the readout enable register for ADC and VCA. – Set SPI_DIG_EN as '0' and write anything to the register whose stored data needs to be known. Device finds the address of the register and sends its stored data at the SDOUT pin serially. NOTE After enabling the register 0x0[1] REGISTER_READOUT_ENABLE, data can't be written to the register (whose data needs to be known) but stored data would come serially at the SDOUT pin. – To disable the register readout, first write '0' to register 0x0[1] while SPI_DIG_EN is '1'; then write '0' to register 0x0[1] while SPI_DIG_EN is '0'. Thanks, Chuck Smyth
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