Microchip Technology megaAVR 0 Series Manual page 302

22.5.3 Transmit Data Register Low Byte
Name: TXDATAL
Offset: 0x02
Reset: 0x00
Property: R/W
The Transmit Data Buffer (TXB) register will be the destination for data written to the USARTn.TXDATAL
register location.
For 5-, 6-, or 7-bit characters the upper unused bits will be ignored by the transmitter and set to zero by
the receiver.
The transmit buffer can only be written when the DREIF flag in the USARTn.STATUS register is set. Data
written to DATA when the DREIF flag is not set will be ignored by the USART transmitter. When data is
written to the transmit buffer, and the transmitter is enabled, the transmitter will load the data into the
Transmit Shift register when the Shift register is empty. The data is then transmitted on the TxD pin.
Bit 7
Access R/W
Reset 0
Bits 7:0 – DATA[7:0] Transmit Data Register
©
2018 Microchip Technology Inc.
Universal Synchronous and Asynchronous Recei...
6 5
R/W R/W
0 0
4 3
DATA[7:0]
R/W R/W
0 0
Datasheet Preliminary
®
megaAVR 0-Series
2 1
R/W R/W
0 0
DS40002015A-page 302
0
R/W
0