BU9794KV Datasheet, PDF (4/23 Pages) Rohm – For 200 Segment type LCD LCD Segment Driver

●Command Description （BU9794KV）
D7 (MSB) is bit for command or data judgment.
Refer to Command and data transfer method.
C： 0： Next byte is RAM write data.
1： Next byte is command.
○ Mode Set (MODE SET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C 1 0 0 P3 P2 P1 P0
Set display ON and OFF
Setting
P3
Display OFF
0
Display ON
1
Reset initialize condition
○
Set LCD drive waveform
Setup
P2
Line inversion
0
Frame inversion
1
Reset initialize condition
○
Set Power save mode
Setup
P1 P0 Reset initialize condition
Power save mode 1 0 0
Power save mode 2 0 1
Normal mode
10
○
High power mode
11
＊ Please use in VLCD≧3.0V condition in High power mode.
○ Address set (ADSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C 0 P5 P4 P3 P2 P1 P0
The range of address can be set as 00h to 31h.
Don’t set out of range address, otherwise address will be set 00h.
In reset condition, it will be set 00h.
○ Display control (DISCTL)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C 1 0 1 P3 P2 P1 P0
Set bias level
setup
1/3 Bias
1/2 Bias
P3 Reset initialize condition
0
○
1
Set oscillator mode
setup
P2 Reset initialize condition
Internal oscillation
0
○
External clock input 1
4/22