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Odd SPI response from ADIS16488

Question asked by eliot@lightcrafttech.com on Aug 20, 2013
Latest reply on Sep 3, 2013 by NevadaMark

I'm connecting to an ADIS16488, and debugging the SPI protocol. I'm re-transmitting PROD_ID as recommended, but getting a strange response.

 

I attached the scope outputs. The MOSI looks fine, and the SCLK and the DIN match what I see in the data sheet.

 

However, the DOUT on MISO returns either 0x00 0x00 or 0b00000000 0b10000000. I'm not quite sure what is going wrong.

 

Suggestions?

 

-Eliot

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