ATMEGA8-16AI SL383 Atmel, ATMEGA8-16AI SL383 Datasheet - Page 156

• Manufacturer Part Number: ATMEGA8-16AI SL383
• Description: Semiconductors and Actives, Microprocessors, Microcontrollers
• Manufacturer: Atmel

USART Control and
Status Register C –
UCSRC
156
ATmega8(L)
The UCSRC Register shares the same I/O location as the UBRRH Register. See the
UBRRH/UCSRC Registers” on page 152
• Bit 7 – URSEL: Register Select
This bit selects between accessing the UCSRC or the UBRRH Register. It is read as one when
reading UCSRC. The URSEL must be one when writing the UCSRC.
• Bit 6 – UMSEL: USART Mode Select
This bit selects between Asynchronous and Synchronous mode of operation.
Table 55. UMSEL Bit Settings
Bit
Read/Write
Initial Value
UMSEL
0
1
URSEL
R/W
7
1
UMSEL
R/W
6
0
Asynchronous Operation
Synchronous Operation
Mode
UPM1
R/W
5
0
UPM0
R/W
0
4
section which describes how to access this register.
USBS
R/W
3
0
UCSZ1
R/W
2
1
UCSZ0
R/W
1
1
UCPOL
R/W
0
0
UCSRC
2486W–AVR–02/10
“Accessing