BU97941FV_15 Datasheet, PDF (9/27 Pages) Rohm – Multifunction LCD Segment Driver

BU97941FV MAX 104 segments (SEG26×COM4)
●Command Description
D/C (MSB) is a bit for command or data judgment.
For details, see 3-wire Serial Interface Command, Data Transfer Method.
○Mode Set Command (MODESET)
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex Reset
1st byte Command
1
0
0
0
0
0
0
1 81h
-
2nd byte Command
0
0
0
0 P3 P2 P1 P0
-
00h
Display setting
Setting
P3 Reset state
Display OFF
0
○
Display ON
1
Display OFF ： Oscillation circuit operation OFF, Liquid crystal power supply circuit operation OFF with frame
cycle. Display OFF state (Output：VSS level)
Display ON ： Oscillation circuit operation ON, Liquid crystal power supply circuit ON. Read operation from
DDRAM starts. Display ON state with frame cycle.
＊LED board is not affected by the ON/OFF state of Display.
The output state of LED port is determined by the setting of the LEDCTL command.
Liquid crystal Drive Waveform Setting
Setting
P2 Reset state
Frame inversion
0
○
Line inversion
1
Power save mode (Low current consumption mode) setting
Setting
P1 P0 Reset state
Power save mode1
0
0
○
Power save mode2
0
1
Normal mode
1
0
High power mode
1
1
＊Use high power mode at VLCD＞3V or higher.
(Reference Current Consumption Data)
Setting
Current
Consumption
Power save mode 1
×1.0
Power save mode 2
×1.7
Normal mode
×2.7
High power mode
×5.0
＊The current consumption data above is reference data and changes according to panel load.
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TSZ02201-0A0A2D300080-1-2
10.Apr.2015 Rev.004