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PCF8575 датащи(PDF) 6 Page - Texas Instruments

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номер детали PCF8575
подробное описание детали  REMOTE 16-BIT I2C AND SMBus I/O EXPANDERWITH INTERRUPT OUTPUT
PDF  32 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

PCF8575 датащи(HTML) 6 Page - Texas Instruments

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SDA
SCL
Data Line
Stable;
Data Valid
Change
of Data
Allowed
Data Output
by Transmitter
SCL from
Master
Start
Condition
S
1
2
8
9
Data Output
by Receiver
Clock Pulse for
Acknowledgment
NACK
ACK
PCF8575
REMOTE 16-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT
SCPS121D – JANUARY 2005 – REVISED APRIL 2007
Figure 2. Bit Transfer
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
6
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