UBBRH – USART Baud Rate Register High
When using the I/O specific commands IN and OUT, the I/O addresses 0x00 - 0x3F must be used. When addressing I/O Registers as data space using LD and ST instructions, 0x20 must be added to these offset addresses.
The UBRRH Register shares the same I/O location as the UCSRC Register. See the Accessing UBRRH/UCSRC Registers section which describes how to access this register.
Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
URSEL | UBRR[3:0] | ||||||
AccessR/W | R/W | R/W | R/W | R/W | |||
Reset0 | 0 | 0 | 0 | 0 |
Register Select
USART Baud Rate Register [n = 11:8]
Refer to UBRRL.