BU91797MUF-M Datasheet, PDF (11/27 Pages) Rohm – Low Duty LCD Segment Driver for Automotive application

BU91797MUF-M MAX 144 segments (SEG36×COM4)
Datasheet
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.
Setup
P4 P3
Reset initialize condition
Normal mode (80Hz)
0
0
○
Power save mode 1 (71Hz)
0
1
Power save mode 2 (64Hz)
1
0
Power save mode 3 (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 mode 1
0
0
Power save mode 2
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
Use VDD- VLCD ≥ 3.0V in High power mode condition.
(Reference current consumption data)
Setup
Current consumption
Power save mode 1
×0.5
Power save mode 2
×0.67
Normal mode
×1.0
High power mode
×1.8
The data above is for reference only. Actual consumption depends on Panel load.
Address Set (ADSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
0
0 P4 P3 P2 P1 P0
The range of address can be set from 000000 to 100011(bin).
Internal register
Command
MSB
Address
[5]
ICSET
P2
Address
[4]
ADSET
P4
Address
[3]
ADSET
P3
Address
[2]
ADSET
P2
Address
[1]
ADSET
P1
LSB
Address
[0]
ADSET
P0
Address [5:0]: MSB bit is specified in ICSET P2 and [4:0] are specified as ADSET P4 - P0.
Don’t set out of range address, otherwise address will be set to 00000.
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21.Dec.2015 Rev.001