ZHCSKJ6 December 2019 TL16C750E
PRODUCTION DATA.
Transmitter: TXRDY is active when a trigger level number of spaces are available. It becomes inactive when the FIFO is full.
Receiver: RXRDY becomes active when the trigger level has been reached or when a timeout interrupt occurs. It goes inactive when the FIFO is empty or an error in the RX FIFO is flagged by LSR(7).
Figure 29 shows TXRDY and RXRDY in DMA mode 1.