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PCA9536DT Datasheet(PDF) 8 Page - Texas Instruments |
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PCA9536DT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page www.ti.com Bus Transactions Writes SCL Start Condition Data 1 Valid SDA Write to Port Data Out From Port R/W ACK From Slave ACK From Slave ACK From Slave 1 9 8 7 6 5 4 3 2 Data 1 1 0 1 0 S 0 0 0 1 0 A 0 0 0 0 0 0 0 A A P tpv Data to Port Command Byte Slave Address Data 1 0 1 0 S 0 0 0 1 0 A 1 0 0 0 0 0 0 A A P SCL SDA Data to Register Start Condition R/W ACK From Slave ACK From Slave ACK From Slave 1 9 8 7 6 5 4 3 2 Data to Register Command Byte Slave Address PCA9536 REMOTE 4-BIT I2C AND SMBus I/O EXPANDER WITH CONFIGURATION REGISTERS SCPS125C – APRIL 2006 – REVISED NOVEMBER 2006 Data is exchanged between the master and PCA9536 through write and read commands. Data is transmitted to the PCA9536 by sending the device address and setting the least-significant bit (LSB) to a logic 0 (see Figure 4 for device address). The command byte is sent after the address and determines which register receives the data that follows the command byte. There is no limitation on the number of data bytes sent in one write transmission (see Figure 6 and Figure 7). Figure 6. Write to Output Port Register <br/> Figure 7. Write to Configuration or Polarity Inversion Registers 8 Submit Documentation Feedback |
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