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AT89C5132-ROTIL Folha de dados(PDF) 140 Page - ATMEL Corporation |
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AT89C5132-ROTIL Folha de dados(HTML) 140 Page - ATMEL Corporation |
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140 / 182 page ![]() 140 4173E–USB–09/07 AT89C5132 Table 20. Status for Master Transmitter Mode Status Code SSSTA Status of the TWI Bus and TWI Hardware Application Software Response Next Action Taken by TWI Hardware To/From SSDAT To SSCON SSSTA SSSTO SSI SSAA 08h A START condition has been transmitted Write SLA+W X 0 0 X SLA+W will be transmitted. 10h A repeated START condition has been transmitted Write SLA+W Write SLA+R X X 0 0 0 0 X X SLA+W will be transmitted. SLA+R will be transmitted. Logic will switch to master receiver mode 18h SLA+W has been transmitted; ACK has been received Write data Byte No SSDAT action No SSDAT action No SSDAT action 0 1 0 1 0 0 1 1 0 0 0 0 X X X X Data Byte will be transmitted. Repeated START will be transmitted. STOP condition will be transmitted and SSSTO flag will be reset. STOP condition followed by a START condition will be transmitted and SSSTO flag will be reset. 20h SLA+W has been transmitted; NOT ACK has been received Write data Byte No SSDAT action No SSDAT action No SSDAT action 0 1 0 1 0 0 1 1 0 0 0 0 X X X X Data Byte will be transmitted. Repeated START will be transmitted. STOP condition will be transmitted and SSSTO flag will be reset. STOP condition followed by a START condition will be transmitted and SSSTO flag will be reset. 28h Data Byte has been transmitted; ACK has been received Write data Byte No SSDAT action No SSDAT action No SSDAT action 0 1 0 1 0 0 1 1 0 0 0 0 X X X X Data Byte will be transmitted. Repeated START will be transmitted. STOP condition will be transmitted and SSSTO flag will be reset. STOP condition followed by a START condition will be transmitted and SSSTO flag will be reset. 30h Data Byte has been transmitted; NOT ACK has been received Write data Byte No SSDAT action No SSDAT action No SSDAT action 0 1 0 1 0 0 1 1 0 0 0 0 X X X X Data Byte will be transmitted. Repeated START will be transmitted. STOP condition will be transmitted and SSSTO flag will be reset. STOP condition followed by a START condition will be transmitted and SSSTO flag will be reset. 38h Arbitration lost in SLA+W or data Bytes No SSDAT action No SSDAT action 0 1 0 0 0 0 X X TWI bus will be released and not addressed slave mode will be entered. A START condition will be transmitted when the bus becomes free. |
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