My customer used F28022 as primary PFC controller, and used shadow mode for CMPA register update, and during their products' test, while the bit SHDWAFULL is set to 1, their system THDI is very bad.
Could you kindly give comments on below items:
1) Conditions on SHDWAFULL bit is set to 1? which means the CMPA shadow FIFO is full?
2) Comments on how to eliminate the condition that SHDWAFULL set to 1?
Expect for your reply, thanks.