I am attempting to use the AD7606-6 evaluation board in stand alone mode. I have configured the board for serial output. The board seems to respond normally except that DOUTA and DOUTB are continuously zero. Initial conditions are as follows:
\PAR/SER/BYTE SEL hi
RANGE hi +/- 10V
DB[15:9] & DB[6:0] tied to ground
REF SELECT hi
Attached is a screen shot from logic analyzer. With an input on V1, I expect to see some bits in the first word but DOUTA is stuck at zero. All the other signals including FRSTDATA look normal. I repeated the test with an input on V6 with the same result.
I would be grateful for any suggestions about what I might be doing wrong