Datasheet

Bit 0 – TXB8 Transmit Data Bit 8

TXB8 is the ninth data bit in the character to be transmitted when operating with serial frames with nine

data bits. Must be written before writing the low bits to UDR.

AVR 8-Bit Microcontroller

USART - Universal Synchronous and Asynchrono...

Datasheet Complete

40001974A-page 206