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programming ADS7957

Other Parts Discussed in Thread: ADS7957

Hi,

 

I'm having trouble programming an ADS7957.  I wanted to put it Auto-2 mode, scanning all the channels.  I send the following data after power up:

0011 1000 0100 0000 (x3840)

1001 0011 1100 0000 (x93C0)

0001 0000 0000 0000 (x1000)

I also tried sending the first sixteen bit word 3 times, as shown on the data sheet. Didn't make any sense, nor was there an explanation, but I tried it anyway.

The mux seems to be stuck on channel 0-it doesn't change as I expected it to.  What did I do wrong? Is there some sample code somewhere?

 

Thanks,

Barry