ZHCSKJ6 December 2019 TL16C750E
PRODUCTION DATA.
This 8-bit register is used to store the receive FIFO threshold levels to start or stop transmission during hardware or software flow control. Table 24 shows transmission control register bit settings.
| BIT | BIT SETTINGS |
|---|---|
| 3:0 | RCV FIFO trigger level to HALT transmission (0 to 60) |
| 7:4 | RCV FIFO trigger level to RESTORE transmission (0 to 60) |
TCR trigger levels are available from 0 to 120 bytes with a granularity of 8.
TCR can be written to only when EFR[4] = 1 and MCR[6] = 1. The programmer must program the TCR such that TCR[3:0] > TCR[7:4]. There is no built-in hardware check to make sure this condition is met. Also, the TCR must be programmed with this condition before Auto-RTS or software flow control is enabled to avoid spurious operation of the device.