ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 81

• Manufacturer Part Number: ATMEGA163
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

1142E–AVR–02/03
Figure 51. Block Diagram of the Two-wire Serial Interface
The CPU interfaces with the Two-wire Serial Interface via the following five I/O Regis-
ters: the Two-wire Serial Interface Bit Rate Register (TWBR), the Two-wire Serial
Interface Control Register (TWCR), the Two-wire Serial Interface Status Register
(TWSR), the Two-wire Serial Interface Data Register (TWDR), and the Two-wire Serial
Interface Address Register (TWAR, used in Slave mode).
SDA
SCL
OUTPUT
OUTPUT
INPUT
INPUT
TWAR
ADDRESS REGISTER
TWDR
STATUS DECODER
STATE MACHINE
SERIAL CLOCK
COMPARATOR
ARBITRATION
START/STOP
GENERATOR
DATA SHIFT
AND SYNC
REGISTER
STATUS
AND
AND
TWCR
TWSR
ATmega163(L)
REGISTER
REGISTER
CONTROL
CONTROL
STATUS
TIMING
AND
ACK
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