ATmega8(L)
Register Summary (Continued)
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
TWS6
TWS5
TWS4
TWS3
TWPS1
TWPS0
0x01 (0x21)
0x00 (0x20)
TWSR
TWBR
TWS7
–
170
168
Two-wire Serial Interface Bit Rate Register
Notes: 1. Refer to the USART description for details on how to access UBRRH and UCSRC.
2. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
should never be written.
3. Some of the Status Flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions will operate on
all bits in the I/O Register, writing a one back into any flag read as set, thus clearing the flag. The CBI and SBI instructions
work with registers 0x00 to 0x1F only.
283
2486M–AVR–12/03
ATMEL [ ATMEL ]
