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AD9958 clear phase accumulator bits

Question asked by sas on Dec 12, 2012
Latest reply on Dec 19, 2012 by DSB

After I set the Autoclear phase accumulator in the CFR register of the AD9958, I can't get it the bit to clear when I write a 0 the that bit of the register. After I use this bit, my output phase is reset erratically because I using the profile pins for frequency modulation.

 

I've tried using the Clear phase accumulator bit instead, and found it too will not clear, same as the Autoclear phase accumulator bit. It's also suppose to "self clear" when the I/O update occurs and does not. This results in no output on my output until I reset the chip.

 

How do I clear these bits after I use them?

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