SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
UART0_RTS data flow control originates in the receiver block (see Figure 6-225). When the receiver FIFO level reaches a trigger level of 1, 4, 8, or 14 (see Figure 6-228), UART0_RTS is deasserted. The sending UART may send an additional byte after the trigger level is reached (assuming the sending UART has another byte to send), because it may not recognize the deassertion of UART0_RTS until after it has begun sending the additional byte. For trigger level 1, 4, and 8, UART0_RTS is automatically reasserted once the receiver FIFO is emptied. For trigger level 14, UART0_RTS is automatically reasserted once the receiver FIFO drops below the trigger level.