SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
Hardware flow control between two devices is accomplished by connecting the UART0RTS output to the Clear-To-Send input on the receiving device, and connecting the Request-To-Send output on the receiving device to the UART0CTS input.
The UART0CTS input controls the transmitter. The transmitter can transmit data only when the UART0CTS input is asserted. The UART0RTS output signal indicates the state of the receive FIFO. UART0CTS remains asserted until the preprogrammed trigger level is reached, indicating that the RX FIFO has no space to store additional characters.
The UART:CTL.CTSEN and UART:CTL.RTSEN specify the flow control mode as shown in Table 22-2.
CTSEN | RTSEN | Description |
---|---|---|
1 | 1 | RTS and CTS flow control enabled |
1 | 0 | Only CTS flow control enabled |
0 | 1 | Only RTS flow control enabled |
0 | 0 | Both RTS and CTS flow control disabled |