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LP8556 Datasheet(PDF) 32 Page - Texas Instruments

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Part # LP8556
Description  High-Efficiency LED Backlight Driver for Tablets
PDF  52 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LP8556 Datasheet(HTML) 32 Page - Texas Instruments

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A/
NA
S
'0'
Slave Address
(7 bits)
Control Register Add.
(8 bits)
A
A
Data- Data
(8 bits)
P
R/W
Data transfered, byte +
Ack/NAck
Sr
Slave Address
(7 bits)
'1' A
R/W
Direction of the transfer
will change at this point
From Master to Slave
From Slave to Master
A - ACKNOWLEDGE (SDA Low)
S - START CONDITION
P - STOP CONDITION
Sr - REPEATED START CONDITION
Register Read Format
NA - ACKNOWLEDGE (SDA High)
S
'0'
Slave Address
(7 bits)
Control Register Add.
(8 bits)
A
A
A
Register Data
(8 bits)
P
R/W
From Master to Slave
From Slave to Master
A - ACKNOWLEDGE (SDA Low)
S - START CONDITION
P - STOP CONDITION
Data transfered,
byte + Ack
Register Write Format
LP8556
SNVS871B – JULY 2012 – REVISED SEPTEMBER 2012
www.ti.com
Register Read and Write Detail
Figure 30. Register Write Format
Figure 31. Register Read Format
Table 8. Register Map
ADD
REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
RESET
R
00H
Brightness
BRT[7:0]
0000
Control
0000
01H
Device Control
FAST
BRT_MODE
BL_CTL
0000
0000
02H
Status
OPEN
SHORT
VREF_OK
VBOOST_
OVP
OCP
TSD
UVLO
0000
OK
0000
03H
ID
PANEL
MFG
REV
1111
1100
04H
Direct Control
LED
0000
0000
16H
LED Enable
LED_EN
0011
1111
Table 9. EPROM Memory Map
ADD
REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
R
98H
CFG98
IBOOST_LIM
RESERVED
RESERVED
_2X
9EH
CFG9E
RESERVED
VBOOST_RA
RESERVE
HEADROOM_OFFSET
NGE
D
A0H
CFG0
CURRENT LSB
A1H
CFG1
PDET_STDB
CURRENT_MAX
CURRENT MSB
Y
A2H
CFG2
RESERVED
UVLO_EN
UVLO_TH
BL_ON
ISET_EN
BOOST_FSET PWM_FSET_
_EN
EN
32
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Copyright © 2012, Texas Instruments Incorporated
Product Folder Links: LP8556



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