Datasheet

12
Table 2. Control Shift Register

Bit D
7
On-Time Duty Relative
Set Low PWM Brightness Oscillator Factor Brightness
to Select Control Cycles (%) (%)
Control
Word 0 LLLL 0 0 0
LLLH 1 0.2 1.7
LLH L 2 0.4 3.3
LLH H 3 0.6 5.0
LHL L 4 0.8 6.7
LHLH 5 1.0 8.3
L H H L 7 1.4 11.7
L HHH 9 1.8 15
H LLL 11 2.1 18
HLL H 14 2.7 23
HLHL 18 3.5 30
HLH H 22 4.3 37
HHL L 28 5.5 47
HHL H 36 7.0 60
HHHL 48 9.4 80
HHHH 60 11.7 100
CONTROL WORD 0
LD
6
D
5
D
4
D
3
D
2
D
1
D
0
Peak Current Typical Peak Relative Full
Brightness Pixel Current Scale Current
Control (mA) (Relative Brightness, %)
HL 4.0 31
LH 6.4 50
L L 9.3 73 (Default at Power Up)
H H 12.8 100
SLEEP MODE L − DISABLES INTERNAL OSCILLATOR-DISPLAY BLANK
H − NORMAL OPERATION
Serial/Simultaneous Data Out
L − D
out
holds contents of Bit D
7
H − D
out
is functionally tied to D
in
External Display Oscillator Prescaler
L − Oscillator Freq  1
H − Oscillator Freq  8

Bit D
7
Set High
to Select
Control
Word 1
Reserved for Future
Use (Bits D
2
-D
6
must be set Low)
CONTROL WORD 1
H LLLLLD
1
D
0