atmega323l ATMEL Corporation, atmega323l Datasheet - Page 103
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atmega323l
Manufacturer Part Number
atmega323l
Description
Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA323L.pdf
(247 pages)
- Current page: 103 of 247
- Download datasheet (4Mb)
1457G–AVR–09/03
Figure 54. 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
ATmega323(L)
REGISTER
REGISTER
CONTROL
CONTROL
STATUS
TIMING
AND
ACK
103
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