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?