SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
In all IR modes, when address checking is enabled, only frames intended for the device are written to the RX FIFO. This restriction avoids receiving frames not meant for this device in a multipoint infrared environment. It is possible to program two frame addresses that the UART IrDA receives, with the UART_XON1_ADDR1[7-0] XON_WORD1 and UART_XON2_ADDR2[7-0] XON_WORD2 bit fields.
Setting the UART_EFR[0] bit to 1 selects address1 checking. Setting the UART_EFR[1] bit to 1 selects address2 checking. Setting the UART_EFR[1-0] bit field to 0 disables all address checking operations. If both bits are set, the incoming frame is checked for private and public addresses.
If address checking is disabled, all received frames write to the RX FIFO.