SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
In all IR modes, when address checking is enabled by setting the UART_EFR[1-0] bit field (see Table 12-444), only frames intended for the device are written to the RX FIFO. This is to avoid receiving frames not meant for this device in a multipoint infrared environment. To program two frame addresses that the UARTi receives in IrDA mode, use the UART_XON1_ADDR1[7-0] and UART_XON2_ADDR2[7-0] bit fields.
UART_EFR[1] | UART_EFR[0] | IR Address Checking |
---|---|---|
0 | 0 | All address-checking operations disabled |
0 | 1 | Only address 1 checking enabled |
1 | 0 | Only address 2 checking enabled |
1 | 1 | All address-checking operations enabled |