BU91799KV-M Datasheet, PDF (11/29 Pages) Rohm – Low Duty LCD Segment Driver for Automotive Application

BU91799KV-M MAX 200 segments (SEG50×COM4)
Display Control (DISCTL)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
0
1
P4 P3 P2 P1 P0
Set Power save mode FR
Power save mode FR
P4
P3 Reset initialize condition
Normal mode (80Hz)
0
0
○
Power save mode1 (71Hz)
0
1
Power save mode2 (64Hz)
1
0
Power save mode3 (50Hz)
1
1
Power consumption is reduced in the following order:
Normal mode > Power save mode1 > Power save mode 2 > Power save mode 3.
Set LCD drive waveform
Setup
P2 Reset initialize condition
Line inversion
0
○
Frame inversion
1
Power consumption is reduced in the following order:
Line inversion > Frame inversion
Typically, when driving large capacitance LCD, Line inversion will increase the influence of crosstalk.
Regarding driving waveform, refer to LCD driving waveform.
Set Power save mode SR
Setup
P1
P0 Reset initialize condition
Power save mode1
0
0
Power save mode2
0
1
Normal mode
1
0
○
High power mode
1
1
Power consumption is increased in the following order:
Power save mode 1 < Power save mode 2 < Normal mode < High power mode
(Reference current consumption data)
Setup
Current consumption
Power save mode 1
×0.6
Power save mode 2
×0.8
Normal mode
×1.0
High power mode
×1.2
The data above is for reference only. Actual consumption depends on Panel load.
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8. Feb. 2016 Rev.001