Part Number:ADS1298
We recently made a prototype board in which we accidentally swapped the CLK and CLKSEL. The intent was to pull CLKSEL high and leave CLK floating, but we did it the other way around. See below:
There is no information in the datasheet about whether CLKSEL is pulled up or down, but we cannot talk to the device (no activity on DOUT line when trying to read a register). The previous version of this prototype used the flat pack version and it worked, so we know the code and rest of the circuit are okay.
Finally, since CLK was accidentally brought out, I piped in a 2.048MHz clock signal, but this still didn't get things working. So is it just an illegal state for CLKSEL to be floating? Does it need to be tied hard high or low in order for the device to work?
-Jamie