SC657ULTRT Semtech, SC657ULTRT Datasheet - Page 17

• Manufacturer Part Number: SC657ULTRT
• Description: Backlight Driver For 5 LEDs With SemPulseTM Interface
• Manufacturer: Semtech

Register and Bit Definitions (continued)
Main Backlight Current Control Register (01h)
This register is used to set the currents for the backlight
current sinks assigned to the Main Backlight Group. This
group can also be used to control red LEDs for limited RGB
control. These current sinks need to be enabled in the
Backlight Enable Control register to be active.
Bit D5
This bit is unused and is always a zero, so the maximum
pulse count for this register is 3.
MBL4 — MBL0 [D4:D0]
These bits are used to set the current for the main back-
light current sinks. All enabled main backlight current
sinks will sink the same current, as shown in Table 4.
() Reserved for future use
MBL4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
















Table 4 — Main Backlight Current Settings
MBL3
0
0
0
0
0
0
0
0








0
0
0
0
0
0
0
0








MBL2
0
0
0
0




0
0
0
0




0
0
0
0




0
0
0
0




MBL
0
0


0
0


0
0


0
0


0
0


0
0


0
0


0
0


MBL0
0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Backlight Current (mA)
See note 
See note 
See note 
0.5
.0
.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
6.0
7.0
8.0
9.0
0

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