Hi,
We are using ADS7949 ADC for our customer project. I have attached the schematics for the same. The voltage levels and timings are conforming to specifications provided in data sheet. But still we are getting a value of zero on MISO pin, no matter whatever is input voltage. Only value that I am suspecting is set up time(tsu1) which is 3.5nS, where as we are getting it at 3ms as we are driving chip select with GPIO line.
Please note that pin number 7 and 8 are interchanged in schematic but on circuit it is proper.
We saw same behavior on two different boards.