ATA6612_10 Datasheet, PDF (258/364 Pages) ATMEL Corporation – Very Low Current Consumption in Sleep Mode

Table 7-93. Status Codes for Slave Transmitter Mode
Status Code
(TWSR)
Prescaler
Bits
are 0
Status of the 2-wire Serial
Bus and 2-wire Serial
Interface Hardware
Application Software Response
To TWCR
To/from TWDR STA STO TWINT TWEA Next Action Taken by TWI Hardware
0xA8
Own SLA+R has been
received;
ACK has been returned
Load data byte or X
0
1
0 Last data byte will be transmitted and NOT ACK
should be received
Load data byte
X
0
1
1 ^{Data byte will be transmitted and ACK should be}
received
0xB0
Arbitration lost in SLA+R/W as ^{Load data byte or X}
0
1
0 Last data byte will be transmitted and NOT ACK
Master; own SLA+R has been
should be received
received; ACK has been
returned
Load data byte
X
0
1
1 ^{Data byte will be transmitted and ACK should be}
received
0xB8
Load data byte or X
0
1
0 Last data byte will be transmitted and NOT ACK
Data byte in TWDR has been
should be received
transmitted; ACK has been
received
Load data byte
X
0
1
1 ^{Data byte will be transmitted and ACK should be}
received
0xC0
No TWDR action or 0
0
1
0 Switched to the not addressed Slave mode;
no recognition of own SLA or GCA
No TWDR action or 0
0
1
1 Switched to the not addressed Slave mode;
own SLA will be recognized;
GCA will be recognized if TWGCE = “1”
No TWDR action or 1
0
1
0 Switched to the not addressed Slave mode;
Data byte in TWDR has been
transmitted; NOT ACK has
no recognition of own SLA or GCA;
been received
a START condition will be transmitted when the
bus becomes free
No TWDR action 1
0
1
1 ^{Switched to the not addressed Slave mode;}
own SLA will be recognized;
GCA will be recognized if TWGCE = “1”;
a START condition will be transmitted when the
bus becomes free
0xC8
No TWDR action or 0
0
1
0 Switched to the not addressed Slave mode;
no recognition of own SLA or GCA
No TWDR action or 0
0
1
1 Switched to the not addressed Slave mode;
own SLA will be recognized;
GCA will be recognized if TWGCE = “1”
No TWDR action or 1
0
1
0 Switched to the not addressed Slave mode;
Last data byte in TWDR has
been transmitted (TWEA =
no recognition of own SLA or GCA;
“0”); ACK has been received
a START condition will be transmitted when the
bus becomes free
No TWDR action 1
0
1
1 ^{Switched to the not addressed Slave mode;}
own SLA will be recognized;
GCA will be recognized if TWGCE = “1”;
a START condition will be transmitted when the
bus becomes free
258 ATA6612/ATA6613
9111G–AUTO–05/10