BU91799KV-M Datasheet, PDF (10/29 Pages) Rohm – Low Duty LCD Segment Driver for Automotive Application

BU91799KV-M MAX 200 segments (SEG50×COM4)
Detailed Command Description
D7 (MSB) is a command or data judgment bit.
Refer to Command and data transfer method.
C: 0: Next byte is RAM write data.
1: Next byte is command.
Mode Set (MODESET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
1
0
0
P3 P2
*
*
( * : Don‟t care)
Set display ON and OFF
Setup
Display OFF (DISPOFF)
Display ON (DISPON)
P3 Reset initialize condition
0
○
1
Display OFF : Regardless of DDRAM data, all SEGMENT and COMMON output will be stopped after 1frame off
data write. Display OFF mode will be disabled after Display ON command.
Display ON : SEGMENT and COMMON output will be active and start to read the display data from DDRAM.
Set bias level
Setup
P2
1/3 Bias
0
1/2 Bias
1
Refer to LCD driving waveform
Reset initialize condition
○
Address Set (ADSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
0
0
P4 P3 P2 P1 P0
The range of address can be set from 000000 to 110001(bin).
Internal register
Command
MSB
Address
[5]
ICSET
P2
Address
[4]
ADSET
P4
Address
[3]
ADSET
P3
Address
[2]
ADSET
P2
Address
[1]
ADSET
P1
LSB
Address
[0]
ADSET
P0
Address [5:0]: MSB bit is specified in ICSET P2 and [4:0] are specified as ADSET P4 - P0.
Don‟t set out of range address, otherwise address will be set 00000.
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TSZ02201-0P4P0D301050-1-2
8. Feb. 2016 Rev.001