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LP55281TL/NOPB Datasheet(PDF) 29 Page - Texas Instruments

Part # LP55281TL/NOPB
Description  LP55281 12-Channel RGB/White-LED Drive With SPI, I2C Interface
PDF  42 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LP55281TL/NOPB Datasheet(HTML) 29 Page - Texas Instruments

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background image
start
msb Chip Address lsb
w
ack
msb Register Add lsb
ack
msb
DATA
lsb
ack
stop
ack from slave
ack from slave
ack from slave
SCL
SDA
start
id = 4Ch
w
ack
addr = 02H
ack
ack
address 02H data
stop
ack from slave
msb Chip Address lsb
ack from slave
w
msb Register Add lsb
rs
r
msb
DATA
lsb
stop
ack from slave
repeated start
data from slave
start
Id = 4Ch
w ack
addr = h00
ack
rs
r ack
Address 00h data
ack stop
msb Chip Address lsb
Id = 4Ch
start
SCL
SDA
ack/nack from
master
29
LP55281
www.ti.com
SNVS458D – JUNE 2007 – REVISED OCTOBER 2016
Product Folder Links: LP55281
Submit Documentation Feedback
Copyright © 2007–2016, Texas Instruments Incorporated
< > Data from master, [ ] data from slave
Figure 24. Register READ Format
When a READ function is to be accomplished, a WRITE function must precede the READ function, as shown in
the Read Cycle waveform.
Figure 25. Register WRITE Format
•
w = write (SDA = 0)
•
r = read (SDA = 1)
•
ack = acknowledge (SDA pulled down by either master or slave)
•
rs = repeated start
•
id = 7-bit device address



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