ZHCSKJ6 December 2019 TL16C750E
PRODUCTION DATA.
Transmitter: When empty, the TXRDY signal becomes active. TXRDY goes inactive after one character has been loaded into it.
Receiver: RXRDY is active when there is at least one character in the FIFO. It becomes inactive when the receiver is empty.
Figure 28 shows TXRDY and RXRDY in DMA mode 0 or FIFO disable.