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LM27966 데이터시트(PDF) 9 Page - Texas Instruments

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부품명 LM27966
상세설명  LM27966 White LED Driver with I2C Compatible Interface
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

LM27966 데이터시트(HTML) 9 Page - Texas Instruments

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background image
0
bit7
0
bit6
1
bit5
T1
bit4
EN-D5
bit3
EN-AUX
bit2
T0
bit1
EN-MAIN
bit0
MSB
LSB
ADR6
bit7
ADR5
bit6
ADR4
bit5
ADR3
bit4
ADR2
bit3
ADR1
bit2
ADR0
bit1
R/W
bit0
MSB
LSB
0
0
0
1
1
1
1
I
2
C Slave Address (chip address)
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
SDIO
start
Id = 36h
w
ack
addr = 10h
ack
ack
DGGUHVV K¶06 data
stop
LM27966
www.ti.com
SNVS448B – JULY 2006 – REVISED MAY 2013
Figure 9. Write Cycle
w = write (SDIO = "0")
r = read (SDIO = "1")
ack = acknowledge (SDIO pulled down by either master or slave)
rs = repeated start
id = chip address, 36h for LM27966
I2C COMPATIBLE CHIP ADDRESS
The chip address for LM27966 is 0110110, or 36h.
Figure 10. Chip Address
INTERNAL REGISTERS OF LM27966
Register
Internal Hex Address
Power On Value
General Purpose Register
10h
0010 0000
Main Display Brightness Control Register
A0h
1110 0000
Auxiliary LED Brightness Control Register
C0h
1111 1100
Figure 11. General Purpose Register Description
Internal Hex Address: 10h
NOTE
EN-MAIN: Enables Dx LED drivers (Main Display)
T0: Must be set to '0'
EN-AUX: Enables DAUX LED driver (Indicator Lighting)
EN-D5: Enables D5 LED voltage sense
T1: Must be set to '0'
Copyright © 2006–2013, Texas Instruments Incorporated
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