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AT89LP6440 Datasheet(PDF) 124 Page - ATMEL Corporation |
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AT89LP6440 Datasheet(HTML) 124 Page - ATMEL Corporation |
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124 / 194 page  124 3706A–MICRO–9/09 AT89LP6440 - Preliminary . Table 18-9. Status Codes for Slave Transmitter Mode Status Code (TWSR) Status of the Two-wire Serial Bus and Two-wire Serial Interface Hardware Application Software Response Next Action Taken by TWI Hardware To/from TWDR To TWCR STA STO TWIF AA A8h Own SLA+R has been received; ACK has been returned Load data byte 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 B0h Arbitration lost in SLA+R/W as master; own SLA+R has been received; ACK has been returned Load data byte 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 B8h Data byte in TWDR has been transmitted; ACK has been received Load data byte 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 C0h Data byte in TWDR has been transmitted; NOT ACK has been received No action 0 0 1 0 Switched to the not addressed Slave mode; no recognition of own SLA or GCA No action 0 0 1 1 Switched to the not addressed Slave mode; own SLA will be recognized; GCA will be recognized if GC = “1” No action 1 0 1 0 Switched to the not addressed Slave mode; no recognition of own SLA or GCA; a START condition will be transmitted when the bus becomes free No action 1 0 1 1 Switched to the not addressed Slave mode; own SLA will be recognized; GCA will be recognized if GC = “1”; a START condition will be transmitted when the bus becomes free C8h Last data byte in TWDR has been transmitted (AA = “0”); ACK has been received No action 0 0 1 0 Switched to the not addressed Slave mode; no recognition of own SLA or GCA No action 0 0 1 1 Switched to the not addressed Slave mode; own SLA will be recognized; GCA will be recognized if GC = “1” No action 1 0 1 0 Switched to the not addressed Slave mode; no recognition of own SLA or GCA; a START condition will be transmitted when the bus becomes free No action 1 0 1 1 Switched to the not addressed Slave mode; own SLA will be recognized; GCA will be recognized if GC = “1”; a START condition will be transmitted when the bus becomes free |
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