SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
PRUSS_UART0_RTS data flow control originates in the receiver block (see Figure 30-39). When the receiver FIFO level reaches a trigger level of 1, 4, 8, or 14 (see Figure 30-42), PRUSS_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 PRUSS_UART0_RTS until after it has begun sending the additional byte. For trigger level 1, 4, and 8, PRUSS_UART0_RTS is automatically reasserted once the receiver FIFO is emptied. For trigger level 14, PRUSS_UART0_RTS is automatically reasserted once the receiver FIFO drops below the trigger level.