BU91799KV-M Datasheet, PDF (19/29 Pages) Rohm – Low Duty LCD Segment Driver for Automotive Application

BU91799KV-M MAX 200 segments (SEG50×COM4)
Start Sequence Example2
Initialize
DISPON
RAM Write
DISPOFF
Initialize Sequence
DISPON Sequence
RAM Write Sequence
DISPOFF Sequence
BU91799KV-M is initialized with Start Sequence, starts to display with “DISPON Sequence”, updates display data with
“RAM Write Sequence” and stops the display with “DISPOFF Sequence”.
Execute “DISPON Sequence” in order to restart display.
Initialize Sequence
Input
DATA
D7
D6
D5
D4
D3
D2
D1
D0
Description
Power on
wait 100us
STOP
START
Slave address
0
1
1
1
1
1
0
0
ICSET
1
1
1
0
1
0
1
0
Execute Software Reset
MODESET
1
1
0
0
0
0
0
0
Display OFF
ADSET
0
0
0
0
0
0
0
0
RAM address set
Display data
*
*
*
*
*
*
*
*
・・・・
Display data
STOP
DISPON Sequence
Input
DATA
D7
D6
D5
D4
D3
D2
D1
D0
Description
START
Slave address
0
1
1
1
1
1
0
0
ICSET
1
1
1
0
1
0
0
1
Execute internal OSC mode
DISCTL
1
0
1
1
1
1
1
1
Set Display Control
BLKCTL
1
1
1
1
0
0
0
0
Set BLKCTL
APCTL
1
1
1
1
1
1
0
0
Set APCTL
EVRSET1
1
1
1
0
0
0
0
0
Set EVR1
EVRSET2
1
1
1
1
1
0
0
0
Set EVR2
MODESET
1
1
0
0
1
0
0
0
Display ON
STOP
RAM Write Sequence
Input
DATA
D7
D6
D5
D4
D3
D2
D1
D0
Description
START
Slave address
0
1
1
1
1
1
0
0
ICSET
1
1
1
0
1
0
0
1
Execute internal OSC mode
DISCTL
1
0
1
1
1
1
1
1
Set Display Control
BLKCTL
1
1
1
1
0
0
0
0
Set BLKCTL
APCTL
1
1
1
1
1
1
0
0
Set APCTL
EVRSET1
1
1
1
0
0
0
0
0
Set EVR1
EVRSET2
1
1
1
1
1
0
0
0
Set EVR2
MODESET
1
1
0
0
1
0
0
0
Display ON
ADSET
0
0
0
0
0
0
0
0
RAM address set
Display data
*
*
*
*
*
*
*
*
・・・・
Display data
STOP
DISPOF Sequence
Input
DATA
D7
D6
D5
D4
D3
D2
D1
D0
Description
START
Slave address
0
1
1
1
1
1
0
0
ICSET
1
1
1
0
1
0
0
1
Execute internal OSC mode
MODESET
1
1
0
0
0
0
0
0
Display OFF
STOP
Abnormal operation may occur in BU91799KV-M due to the effect of noise or other external factor.
To avoid this phenomenon, it is highly recommended to input command according to sequence described above
during initialization, display ON/OFF and refresh of RAM data.
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TSZ02201-0P4P0D301050-1-2
8. Feb. 2016 Rev.001