TCA6418EYFPR datasheet(11/29 Pages) TI1

No de pièce	TCA6418EYFPR

Description	I2C CONTROLLED 18 CHANNEL GPIO EXPANDER

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Fabricant	TI1 [Texas Instruments]

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S

1

2

8

9

NACK

ACK

DataOutput

byTransmitter

DataOutput

byReceiver

SCL From

Master

Start

Condition

ClockPulsefor

Acknowledgment

TCA6418E

www.ti.com

SCPS243 – SEPTEMBER 2012

Figure 7. Acknowledgment on the I2C Bus

Device Address

The address of the TCA6418E is shown in Table 3.

Table 3.

BIT

BYTE

7 (MSB)

6

5

4

3

2

1

0 (LSB)

I2C slave address

0

1

0

1

0

R/W

The last bit of the slave address defines the operation (read or write) to be performed. A high (1) selects a read

operation, while a low (0) selects a write operation.

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