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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega16 датащи(PDF) 191 Page - ATMEL Corporation |
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ATmega16 датащи(HTML) 191 Page - ATMEL Corporation |
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191 / 357 page  191 2466S–AVR–05/09 ATmega16(L) Figure 89. Formats and States in the Master Receiver Mode $08 A START condition has been transmitted Load SLA+R 0 0 1 X SLA+R will be transmitted ACK or NOT ACK will be received $10 A repeated START condition has been transmitted Load SLA+R or Load SLA+W 0 0 0 0 1 1 X X SLA+R will be transmitted ACK or NOT ACK will be received SLA+W will be transmitted Logic will switch to masTer Transmitter mode $38 Arbitration lost in SLA+R or NOT ACK bit No TWDR action or No TWDR action 0 1 0 0 1 1 X X Two-wire Serial Bus will be released and not addressed Slave mode will be entered A START condition will be transmitted when the bus becomes free $40 SLA+R has been transmitted; ACK has been received No TWDR action or No TWDR action 0 0 0 0 1 1 0 1 Data byte will be received and NOT ACK will be returned Data byte will be received and ACK will be returned $48 SLA+R has been transmitted; NOT ACK has been received No TWDR action or No TWDR action or No TWDR action 1 0 1 0 1 1 1 1 1 X X X 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 $50 Data byte has been received; ACK has been returned Read data byte or Read data byte 0 0 0 0 1 1 0 1 Data byte will be received and NOT ACK will be returned Data byte will be received and ACK will be returned $58 Data byte has been received; NOT ACK has been returned Read data byte or Read data byte or Read data byte 1 0 1 0 1 1 1 1 1 X X X 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 Table 75. Status Codes for Master Receiver Mode (Continued) S SLA R A DATA A $08 $40 $50 SLA R $10 AP $48 A or A $38 Other master continues $38 Other master continues W A $68 Other master continues $78 $B0 To corresponding states in slave mode MR MT 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 DATA A n From master to slave From slave to master Any number of data bytes and their associated acknowledge bits This number (contained in TWSR) corresponds to a defined state of the Two-wire Serial Bus. The prescaler bits are zero or masked to zero P DATA A $58 A RS |
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