BU97931FV-LB Datasheet, PDF (11/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97931FV-LB MAX 112 segments (SEG28×COM4)
Detailed Command Descriptions
D/C, Data / Command judgment bit (MSB)
For details, please refer to 3-wire serial I/F
Datasheet
1. Mode Set (MODESET)
1st byte command
2nd byte command
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex Reset
1
0
0
0
0
0
0
1 81h
-
0
0
0
0 P3 P2 P1 P0
-
00h
Display Set
Condition
Display OFF
Display ON
P3 Reset state
0
○
1
Display OFF: No LCD driving mode (Output: VSS Level)
Turn off OSC circuit and LCD power supply circuit. (Synchronized with frame freq)
Display ON: LCD driving mode
Turn on OSC circuit and LCD power supply circuit.
Read data from DDRAM and display to LCD.
LED port and GPO port output states are not influenced by a Display on/off state
Output state is decided by command setup (OUTSET, GPOSET, PWMSET) and INHb terminal state, respectively.
For more details, please refer to each command description.
LCD drive mode set
Condition
Frame inversion
Line inversion
P2 Reset state
0
○
1
Current mode set
Condition
Power save mode1
Power save mode2
Normal mode
High power mode
P1 P0 Reset state
0
0
○
0
1
1
0
1
1
(Reference data of consumption current)
Condition
Current consumption
Power save mode 1
×1.0
Power save mode 2
×1.7
Normal mode
×2.7
High power mode
×5.0
(Note) The value changes according to the panel load.
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26.Feb.2014 Rev.002