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SC668
Register Map (continued)
Bank #3 Backlight Register (04h)
This register is used to set the current for the backlight
LEDs in bank #3 and to enable the lighting effect feature
for bank #3. These backlights can be turned off using the
backlight enable bits of registers 00h and 01h. Writing the
0mA value into this register will also turn off the back-
IB3_4 through IB3_0 [Bits D4:D0]
These bits are used to set the current for the backlight
LEDs in bank #3. All bank #3 enabled current sinks will
sink the same current as shown in Table 4.
Table 4 — Bank #3 Backlight Current
lights, but only if the blink and breathe effects are
disabled.
IB3_4
IB3_3 IB3_2
IB3_1
IB3_0
Backlight
Current (mA)
B3FEN Bit D5
This bit works in conjunction with the B1BEN bit of register
08h to set a lighting effect for bank #3. Figure 22 shows
the lighting effects which are enabled by the combination
of B3FEN and B3BEN. When fade is enabled, fading will
occur in bank #3 each time the bank #3 current is changed,
enabled, or disabled. Blink and breathe functions run in a
continuous loop when they are enabled.
B3BEN = 0
B3FEN = 1
Fade
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0.05
0.1
0.2
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
B3BEN = 1
B3FEN = 0
Blink
Bank #3
No Light Effect
B3BEN = 0
B3FEN = 0
0
0
1
1
1
1
1
1
0
1
6
7
1
1
0
0
0
0
0
0
0
1
8
9
Breathe
B3BEN = 1
B3FEN = 1
Figure 22 — Bank #3 Lighting Effect
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
10
11
12
13
14
15
16
17
18
19
20
21
23
25
30
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