Hello to all! I try to use a 16C554 Uart from TI. I can read and write the Scratchpad (Base +0x07). I can write and read the LCR (Base +0x03) especially the LCR Bit7. I set the LCR,7 to 1. I write values to DLL Base+0)and DLM (BAse+1). But when I read back I always get 0. After setting the LCR,0 to 0 too the uart doesn't send any data written to the RHR. On all 4 Channels I see the same bahaviour. Can anyone help me? Volker Huss
Problem solved. Hardware was defekt. Volker Huss