BU9796AFS-E2 Datasheet, PDF (20/32 Pages) Rohm – Standard LCD Segment Driver

BU9796Axxx Series MAX 80 segments (SEG20×COM4)
Datasheet
○Start sequence example2
Initialize
DISPON
RAM write
DISPOFF
Initialize Sequence
DISPON Sequence
RAM write Sequence
DISPOFF Sequence
This LSI is initialized with Initialize Sequence. And start to display with DISPON Sequence.
This LSI will update display data with RAM write Sequence.
And stop the display with DISPOFF sequence.
If you want to restart to display, This LSI will restart to display with DISPON Sequence.
Initialize sequence
Input
Power on
wait 100us
STOP
START
Slave address
ICSET
MODESET
ADSET
Display data
…
DATA
D7 D6 D5 D4 D3 D2 D1 D0
01111100
11101010
11000000
00000000
********
Description
Execute Software Reset
Display OFF
RAM address set
Display data
STOP
Dispon sequence
Input
START
DATA
D7 D6 D5 D4 D3 D2 D1 D0
Description
Slave address
ICSET
DISCTL
BLKCTL
APCTL
MODESET
01111100
11101000
10111111
11110000
11111100
11001000
Execute internal OSC mode
Set Display Control
Set BLKCTL
Set APCTL
Display ON
STOP
RAM write sequence
Input
START
Slave address
ICSET
DISCTL
BLKCTL
APCTL
MODESET
ADSET
Display Data
…
STOP
DATA
D7 D6 D5 D4 D3 D2 D1 D0
01111100
11101000
10111111
11110000
11111100
11001000
00000000
********
Description
Execute internal OSC mode
Set Display Control
Set BLKCTL
Set APCTL
Display ON
RAM address set
Display data
Dispoff sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
START
Slave address 0 1 1 1 1 1 0 0
ICSET
11101000
MODESET
11000000
STOP
Description
Execute internal OSC mode
Display OFF
Abnormal operation may occur in BU9796A due to the effect of noise or other external factor.
To avoid this phenomenon, please input command according to sequence described above during initialization, display
ON/OFF and refresh of RAM data.
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13.Jun.2014 Rev.003