Table 2. Control Shift Register.
CONTROL WORD 0
L
D
D
D
D
D
D
D
0
6
5
4
3
2
1
↑
On-Time
Duty
Relative
Oscillator Factor Brightness
Bit D
7
Cycles
(%)
(%)
PWM Brightness Control
Set Low
to Select
Control
Word 0
L
L
L
L
L
L
H
L
H
L
H
L
H
L
0
1
0
0
1.7
3.3
5.0
6.7
8.3
11.7
15
L
0.2
0.4
0.6
0.8
1.0
1.4
1.8
2.1
2.7
3.5
4.3
5.5
7.0
9.4
11.7
L
L
H
H
L
2
L
L
3
L
H
H
H
H
L
4
L
L
5
L
H
H
L
7
L
9
H
H
H
H
H
H
H
H
11
14
18
22
28
36
48
60
18
L
L
H
L
H
L
H
L
H
23
L
H
H
L
30
L
37
H
H
H
H
47
L
60
H
H
80
100
Peak Current Typical Peak
Relative Full
Scale Current
(Relative Brightness, %)
Brightness
Control
Pixel Current
(mA)
H
L
L
H
L
4.0
6.4
31
50
L
9.3
73 (Default at Power Up)
100
H
H
12.8
L – DISABLES INTERNAL OSCILLATOR-DISPLAY BLANK
H – NORMAL OPERATION
SLEEP MODE
CONTROL WORD 1
H
L
L
L
L
L
D
D
0
1
↑
Bit D
7
Reserved for Future
Use (Bits D -D must
be set Low)
Serial/Simultaneous Data Out
L – D holds contents of Bit D
Set High
to Select
Control
2
6
OUT
7
H – D
is functionally tied to D
in
OUT
Word 1
External Display Oscillator
Prescaler
L – Oscillator Freq ÷ 1
H – Oscillator Freq ÷ 8
15
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