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SC644 Datasheet(PDF) 19 Page - Semtech Corporation

Part # SC644
Description  Light Management Unit with 4 LDOs and SemPulse짰Interface
PDF  26 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC644 Datasheet(HTML) 19 Page - Semtech Corporation

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SC644
9
Register Map(1)
Address(2)
D5
D4
D3
D2
D1
D0
Reset
Value
Description
00h
BL6EN
BL5EN
BL4EN
BL3EN
BL2EN
BLEN
00h
Backlight Enable
0h
0(3)
MBL4
MBL3
MBL2
MBL
MBL0
00h
Main Backlight Current
02h
0(3)
SBL4
SBL3
SBL2
SBL
SBL0
00h
Sub Backlight Current
05h
0(3)
0(3)
LDOV3
LDOV2
LDOV
LDOV0
00h
LDO
06h
0(3)
0(3)
0(3)
LDO2V2
LDO2V
LDO2V0
00h
LDO2
07h
0(3)
0(3)
LDO3V3
LDO3V2
LDO3V
LDO3V0
00h
LDO3
08h
0(3)
0(3)
LDO4V3
LDO4V2
LDO4V
LDO4V0
00h
LDO4
09h
SFADE
SFADE0
SFADE
MFADE
MFADE0
MFADE
00h
Main/Sub Backlight Fade
0Ah
0(3)
0(3)
0(3)
MB2
MB
MB0
00h
Main/Sub Bank Select
Notes:
() all registers are write-only
(2) Addresses 03h and 04h are not used
(3) 0 = always write a 0 to these bits
Definition of Registers and Bits
BL Enable Control Register (00h)
This register enables the backlight current sinks.
BL6EN through BL1EN [D5:D0]
These bits are used to enable current sinks. These current
sinks will then sink whatever current is set in the corre-
sponding current control register.
Main Backlight Current Control Register (01h)
This register is used to set the currents for the LED drivers
designated as main backlight current sinks. Note these
current sinks can be disabled using register 00h or by
writing the 0mA value into this register.
Bit D5
This bit is unused and is always a zero.



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