BU9797FUV-M Datasheet, PDF (12/28 Pages) Rohm – Integrated Buffer AMP for LCD Driving

BU9797FUV-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 mode1(71Hz)
0
1
Power save mode2(64Hz)
1
0
Power save mode3(53Hz)
1
1
(Note) Operation current decrease in order as
Normal mode > Power save mode1 > Power save mode2 > Power save mode 3.
Set LCD drive waveform.
Setup
P2
Reset initialize
condition
Line inversion mode
0
○
Frame inversion mode
1
(Note) Operation current is Line inversion > Frame inversion
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
(Note1) Operation current increase in order as
Power save mode 1 < Power save mode 2 < Normal mode < High power mode.
(Note2) Please 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
(Note) Above current consumption data is reference value. Change according to panel load.
Power save mode FR / LCD drive waveform / Power save mode SR will affect display image.
Select the best setting in point of current consumption and display image view using LCD panel.
Mode
Flicker
Display grade/Contrast
Power save mode FR
○
-
LCD waveform
○
○
Power save mode SR
-
○
Address set (ADSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
0
0 P4 P3 P2 P1 P0
In the write mode, the range of address can be set from 000000 to 100011(bin).
In the read mode, the range of address can be set from 000000 to 100101(bin).
(Note) Address [5:0]: MSB bit is specified in ICSET P2 and [4:0] are specified as ADSET P4 - P0.
Don‟t specify another address, otherwise address will be set to “000000”.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥15ï½¥001
12/25
TSZ02201-0P4P0D300430-1-2
26.Aug.2013 Rev.001