BU9794KV Datasheet, PDF (14/23 Pages) Rohm – For 200 Segment type LCD LCD Segment Driver

● Command Description （BU9799KV）
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
C1 0
0 P3 P2 *
*
Set display ON and OFF
Setting
P3
Display OFF
0
Display ON
1
Reset initialize condition
○
Set bias level
setup
1/3 Bias
1/2 Bias
P3 Reset initialize condition
0
○
1
○ Address set (ADSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C 0 0 P4 P3 P2 P1 P0
It is set address as follows;
MSB
LSB
Internal register Address [5] Address [4]
・・・
Address [0]
command
ICSET [P2] ADSET [P4]
・・・
ADSET [P0]
The range of address can be set as 00000 to 10001(2).
Don’t set out of range address, otherwise address will be set 00000.
ICSET command is only define MSB bit of address, not set the address of DDRAM.
If want to set the address of DDRAM, it has to be input ADSET command.
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