We have the 85xxDK, but one of the boards has a faulty LDO, U7, which I have discovered is outputting 4.85V rather than 3.3V. This feeds the Codec, U3, for its IOVDD supply. So, in turn, the codec will have been sending 5V I/O signals to the 8531 daughter cards. In our trials to get things working (which we did have working once), now nothing works!
Maybe all of the RF devices are blown up, although they happily program from the CC debugger.
This is holding up our Audio DAC design, so I'm keen to get it resolved, can we send the boards back to an apps engineer for proper evaluation? We need a working reference design to verify our receiver board for the DAC and our USB transmitter which the prototype arrives next week. :(
TIA,
Simon
