ATMEGA48V_11 ATMEL [ATMEL Corporation], ATMEGA48V_11 Datasheet - Page 228

• Manufacturer Part Number: ATMEGA48V_11
• Description: 8-bit Atmel Microcontroller with 4/8/16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

22.7.3
2545T–AVR–05/11
Slave receiver mode
Figure 22-14. Formats and states in the master receiver mode.
In the Slave Receiver mode, a number of data bytes are received from a Master Transmitter
(see
are zero or are masked to zero.
Figure 22-15. Data transfer in slave receiver mode.
To initiate the Slave Receiver mode, TWAR and TWCR must be initialized as follows:
TWAR
Value
Figure
Successfull
reception
from a slave
receiver
Next transfer
started with a
repeated start
condition
Not acknowledge
received after the
slave address
Arbitration lost in slave
address or data byte
Arbitration lost and
addressed as slave
SDA
SCL
22-15). All the status codes mentioned in this section assume that the prescaler bits
From master to slave
From slave to master
$08
S
TWA6
SLA
Device 1
RECEIVER
SLAVE
TWA5
R
MR
TRANSMITTER
Device 2
A or A
DATA
MASTER
$40
$48
$38
$68
A
A
A
$78
TWA4
Other master
Other master
n
continues
continues
P
Device’s own slave address
$B0
Device 3
DATA
A
TWA3
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the 2-wire serial bus. The
prescaler bits are zero or masked to zero
........
$50
$38
To corresponding
states in slave mode
A
A
TWA2
Other master
Device n
DATA
continues
ATmega48/88/168
V
CC
$58
A
TWA1
R1
$10
P
R
S
R2
SLA
TWA0
W
R
TWGCE
MT
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