AD8285 SPI ISSUE

We have been trying to read/write to AD8285 using SPI & its not working ( see below detail)

Based on the datasheet we pulled CS low & provided 16Bit control/Address data & provided addition 8 pulses of clk to read data. We are always reading '0'. See attached picture.

1. First picture yellow is SCLK & green is SDIO.

 

2. Second picture shows CS & SCLK timing.

We have connected below pins to ground as we were planning to use SPI for configuration.

1. MUXA

2. ZSEL

3. AUX

Kindly provide help.

Thanks,

Rakesh