AM6442: About UART mode.

tomitama said:

question 1
About "12.1.5.4.5.1.1 UART Interrupts" chapter of TRM.
  Under what conditions does a time-out interrupt occur?
  Please tell me how to set the time-out time.

Please refer to  the "Time-Out and Break Conditions" section of the UART  for details on time-out. 

tomitama said:

Question 2
About "12.1.5.4.6.4.2 DMA Transfers (DMA Mode 1, 2, or 3)" chapter of TRM.
  Is it possible to use DMA transfer with the FIFO disabled?

No. 

tomitama said:

Question 3
About "12.1.5.6.7 UART_DLH Register" chapter of TRM.
  The CLOCK_MSB of the UART_DLH register is described as 8 bits.
  Divisor is 14-bit, so I think 6bit is correct.
  Is 8bit wrong?

Yes, I agree that DLH description is incorrect. This is confirmed by table 12-653.

Thank you for pointing this out. I will file a ticket to have this corrected in a future revision 

--Paul