185
2503Q–AVR–02/11
ATmega32(L)
$18
SLA+W has been transmitted;
ACK has been received
Load data byte or
No TWDR action or
No TWDR action
0
1
0
1
0
1
X
Data byte will be transmitted and ACK or NOT ACK will
be received
Repeated START will be transmitted
STOP condition will be transmitted and
TWSTO Flag will be Reset
STOP condition followed by a START condition will be
transmitted and TWSTO Flag will be Reset
$20
SLA+W has been transmitted;
NOT ACK has been received
Load data byte or
No TWDR action or
No TWDR action
0
1
0
1
0
1
X
Data byte will be transmitted and ACK or NOT ACK will
be received
Repeated START will be transmitted
STOP condition will be transmitted and
TWSTO Flag will be reset
STOP condition followed by a START condition will be
transmitted and TWSTO Flag will be reset
$28
Data byte has been transmitted;
ACK has been received
Load data byte or
No TWDR action or
No TWDR action
0
1
0
1
0
1
X
Data byte will be transmitted and ACK or NOT ACK will
be received
Repeated START will be transmitted
STOP condition will be transmitted and
TWSTO Flag will be reset
STOP condition followed by a START condition will be
transmitted and TWSTO Flag will be reset
$30
Data byte has been transmitted;
NOT ACK has been received
Load data byte or
No TWDR action or
No TWDR action
0
1
0
1
0
1
X
Data byte will be transmitted and ACK or NOT ACK will
be received
Repeated START will be transmitted
STOP condition will be transmitted and
TWSTO Flag will be reset
STOP condition followed by a START condition will be
transmitted and TWSTO Flag will be reset
$38
Arbitration lost in SLA+W or data
bytes
No TWDR action or
No TWDR action
0
1
0
1
X
Two-wire Serial Bus will be released and not addressed
slave mode entered
A START condition will be transmitted when the bus be-
comes free
Table 74. Status Codes for Master Transmitter Mode