c644ultrt Semtech Corporation, c644ultrt Datasheet - Page 21

• Manufacturer Part Number: c644ultrt
• Description: Light Management Unit With 4 Ldos And Sempulse Interface
• Manufacturer: Semtech Corporation

Register Map (continued)
SBL4 through SBL0 [D4:D0]
These bits are used to set the current for the sub backlight
current sinks. All enabled current sinks will sink the same
current as shown in Table 5.
() Reserved for future use.
SBL4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
















Table 5 — Sub Backlight Current Settings
SBL3
0
0
0
0
0
0
0
0








0
0
0
0
0
0
0
0








SBL2
0
0
0
0




0
0
0
0




0
0
0
0




0
0
0
0




SBL1
0
0


0
0


0
0


0
0


0
0


0
0


0
0


0
0


SBL0
0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Current (mA)
Backlight
See note 
See note 
See note 
0.5
.5
2.5
3.5
4.5
0

2
3
4
5
6
7
8
9
20
2
23
25
0

2
3
4
5
6
7
8
9
LDO1 Control Register (05h)
This register is used to enable LDO and set its output
voltage level.
Bits [D5:D4]
These bits are unused and are always zeroes.
LDO1V3 through LDO1V0 [D3:D0]
These bits set the output voltage of LDO as shown in
Table 6.
LDO1V3
0
0
0
0
0
0
0
0








LDO1V2
Table 6 — LDO1 Control Codes
0
0
0
0




0
0
0
0




LDO1V1
0
0


0
0


0
0


0
0


LDO1V0
0

0

0

0

0

0

0

0

V
3.3V
3.2V
3.V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.2V
.8V
.7V
.6V
.5V
OFF
LDO1
2
2