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PCA9555DGVRG4 Datasheet(PDF) 7 Page - Texas Instruments

Part # PCA9555DGVRG4
Description  REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCA9555DGVRG4 Datasheet(HTML) 7 Page - Texas Instruments

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Data Output
by Transmitter
SCL From
Master
Start
Condition
S
1
2
8
9
Data Output
by Receiver
Clock Pulse for
Acknowledgment
NACK
ACK
PCA9555
www.ti.com ......................................................................................................................................................... SCPS131E – AUGUST 2005 – REVISED MAY 2008
Figure 3. Acknowledgment on I2C Bus
Interface Definition
BIT
BYTE
7 (MSB)
6
5
4
3
2
1
0 (LSB)
I2C slave address
L
H
L
L
A2
A1
A0
R/W
P0x I/O data bus
P07
P06
P05
P04
P03
P02
P01
P00
P1x I/O data bus
P17
P16
P15
P14
P13
P12
P11
P10
Copyright © 2005–2008, Texas Instruments Incorporated
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