customer use AD9889B as HDMI TX, they found when the high temperature improving to a certain, the part might do not output HDMI signal, the displayer is black.
why AD9889B lost the outpout signal in temperature environment?
1) Can you compare a register dump at room temp and functional against high temp and non-functional?
2) Approximately ate what temperature are you seeing this failure?
This part is not free run capable, so if the screen goes black the device has stopped transmitting.
thanks, this issue has been confirmed, customer set the PLL gear to manaul mode, when temperature changed a lot, the PLL is loss of lock. Joe is helping on this issue.
Retrieving data ...