sc643 Semtech Corporation, sc643 Datasheet - Page 19

• Manufacturer Part Number: sc643
• Description: Light Management Unit With 4 Ldos And Sempulse Interface
• Manufacturer: Semtech Corporation

Register Map
Notes:
(1) all registers are write-only
(2) Addresses 03h and 04h are not used
(3) 0 = always write a 0 to these bits
Defi nition of Registers and Bits
BL Enable Control Register (00h)
This register enables the backlight current sinks.
Bit D5
This bit is unused and is always a zero.
BL5EN through BL1EN [D4: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.
Address
0Ah
00h
01h
02h
05h
06h
07h
08h
09h
(2)
SFADE1
D5
0
0
0
0
0
0
0
0
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(1)
SFADE0
BL5EN
MBL4
SBL4
D4
0
0
0
0
0
(3)
(3)
(3)
(3)
(3)
LDO1V3
LDO3V3
LDO4V3
BL4EN
SFADE
MBL3
SBL3
D3
0
0
(3)
(3)
MFADE1
LDO1V2
LDO2V2
LDO3V2
LDO4V2
BL3EN
MBL2
SBL2
MB2
D2
LDO1V1
LDO2V1
LDO3V1
LDO4V1
MFADE0
BL2EN
MBL1
SBL1
MB1
D1
LDO1V0
LDO2V0
LDO3V0
LDO4V0
MFADE
BL1EN
MBL0
SBL0
MB0
D0
Value
Reset
00h
00h
00h
00h
00h
00h
00h
00h
00h
Main/Sub Backlight Fade
Main Backlight Current
Sub Backlight Current
Main/Sub Bank Select
Backlight Enable
Description
LDO1
LDO2
LDO3
LDO4
SC643
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