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Problem with AD9650 leaving PN Short Sequence test mode

Question asked by JohnProv on Jul 10, 2017
Latest reply on Jul 21, 2017 by JohnProv

I'm trying to use the PN Short Sequence test mode and I have a problem when I try to return to normal mode.  As long as I stay in the PN mode, I receive and verity data correctly.


To leave the PN test mode, I write a 0 to reg 0x0D, then a 1 to reg 0xFF.  This seems to confuse the chip and

I cannot go back into the test mode again.  If I apply a reset by writing a 0x3C to reg 0, I can usually get the chip to act normally again.


Is there a different sequence I should be using to exit the test mode?




John P