Hello, All

I am using p89c668 and tl16c754b now. The cpu and uart were working fine before, but one day the board suddenly didn't work.. I found the cpu still works, but when I send the data to uart, uart didn't send out the data, I have check LSR, but I was told that THR always contains something, so I cann't send out the data, I also did internal loop check, the data I send out is not equal to the data I read back, I stuck here for a few days, It is really the pain in the neck.

Anybody has idea about it?

Thanks!
Frank