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PCF8584 Datasheet(PDF) 19 Page - NXP Semiconductors |
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PCF8584 Datasheet(HTML) 19 Page - NXP Semiconductors |
19 / 40 page 1997 Oct 21 19 Philips Semiconductors Product specification I2C-bus controller PCF8584 Fig.9 Slave receiver/slave transmitter modes. handbook, full pagewidth START read byte from S1 register END TX A0 = HIGH A0 = LOW addressed as slave (AAS = 1?) no yes read byte from S1 register PIN bit = 0? yes no read byte from S0 register read or write? (LSB = 1 or 0?) read byte from S1 register PIN bit = 0? R/W = 1 SLAVE TRANSMITTER MODE no yes negative ACK received? (LRB = 1?) yes no write last data byte to S0 register A0 = HIGH A0 = LOW END RX read byte from S1 register PIN bit = 0? R/W = 0 SLAVE RECEIVER MODE no yes STOP detected? (STS = 1?) yes no read last data byte from S0 register write data to S0 register read data from S0 register PIN deactivated (set to '1') PCF8584 goes into slave receiver mode Read incoming address to determine if the R/W bit is 0 or 1 This will differentiate between slave receiver or slave transmitter modes. Check that 'own address' has arrived correctly Check whether 'addressed as slave' MBE713 |
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