BU91R63CH-M3BW Datasheet, PDF (27/37 Pages) Rohm – Low Duty LCD Segment Driver

BU91R63CH-M3BW Max 176 segments (SEG44 x COM4)
Start Sequence Example2
In i ti al ize
DISPON
RAMwrite
DISPOFF
Initialize Sequence
DISPON Sequence
RAM w rite Sequence
DISPOFF Sequence
BU91R63CH-M3BW is initialized with “Initialize 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 (In case of VDD ≠ VLCD)
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
VDD ON
w ait 100us
STOP
START
Slave address
01111100
ICSET
11101010
VLCD ON
STOP
START
Slave address
01111100
ICSET
11101010
MODESET
11000000
ICSET
11101000
ADSET
00000000
Display data
********
Description
7C
Execute Softw are Reset
7C
Execute Softw are Reset
Display OFF
Set RAM Address
Set RAM Address
Display data
STOP
DISPON Sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
START
Slave address
01111100
ICSET
11101000
DISCTL
10100010
BLKCTL
11110000
APCTL
11111100
EVRSET
11100000
MODESET
11001000
STOP
RAM Write Sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
START
Slave address
01111100
DISCTL
10100010
BLKCTL
11110000
APCTL
11111100
EVRSET
11100000
MODESET
11001000
ICSET
11101000
ADSET
00000000
Display Data
********
Description
7C
Set Internal OSC mode
Set Display Control
Set BLKCTL
Set APCTL
Set Contrast Setting
Display ON
Description
7C
Set Display Control
Set BLKCTL
Set APCTL
Set Contrast Setting
Display ON
Set MSB of RAM address
RAM address set
Display data
Initialize Sequence (In case of VDD = VLCD)
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
VDD, VLCD ON
w ait 100us
STOP
START
Slave address
01111100
ICSET
11101010
MODESET
11000000
ICSET
11101000
ADSET
00000000
Display data
********
Description
7C
Execute Softw are Reset
Set Display OFF
Set MSB of RAM address
Set RAM Address
Display data
STOP
STOP
DISPOFF Sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
START
Slave address
01111100
MODESET
11000000
STOP
Description
7C
Display OFF
Abnormal operation may occur in BU91R63CH-M3BW 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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TSZ02201-0P4P0D301380-1-2
10 Feb. 2016 Rev.001