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25.4 Registers – USART USART
Universal Synchronous and Asynchronous
Receiver and Transmitter
Offset Name Bit Pos. 7 6 5 4 3 2 1 0 0x00 RXDATAL 7:0 DATA[7:0] 0x01 RXDATAH 7:0 RXCIF BUFOVF FERR PERR DATA8 0x02 TXDATAL 7:0 DATA[7:0] 0x03 TXDATAH 7:0 DATA8 0x04 STATUS 7:0 RXCIF TXCIF DREIF RXSIF ISFIF BDF WFB 0x05 CTRLA 7:0 RXCIE TXCIE DREIE RXSIE LBME ABEIE RS485 0x06 CTRLB 7:0 RXEN TXEN SFDEN ODME RXMODE[1:0] MPCM 0x07 CTRLC 7:0 CMODE[1:0] PMODE[1:0] SBMODE CHSIZE[2:0] 0x07 CTRLC 7:0 CMODE[1:0] UDORD UCPHA 0x08 BAUD 7:0 BAUD[7:0] 15:8 BAUD[15:8] 0x0A CTRLD 7:0 ABW[1:0] 0x0B DBGCTRL 7:0 DBGRUN 0x0C EVCTRL 7:0 IREI 0x0D TXPLCTRL 7:0 TXPL[7:0] 0x0E RXPLCTRL 7:0 RXPL[6:0]
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