BU9794AKV Datasheet, PDF (16/26 Pages) Rohm – Standard LCD Segment Driver

BU9794AKV MAX 200 Segments (SEG50×COM4)
○Start sequence example 2
Initialize
DISPON
RAM write
DISPOFF
Initialize Sequence
DISPON Sequence
RAM writes 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
DATA
D7 D6 D5 D4 D3 D2 D1 D0
Power on
Description
wait 100us
CSB 'H'
CSB 'L'
IC is initialized
I/F is initialized
SWRST
1 1 1 0 1 0 1 1 Software Reset
MODESET 1 1 0 0 0 0 1 0 Display OFF
ADSET
0 0 0 0 0 0 0 0 RAM address set
Display Data * * * * * * * * ^{Display data}
CSB 'H'
DISPON sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
CSB 'L'
Description
DISCTL
1 1 0 1 0 0 1 1 Display Control
BLKCTL
APCTL
MODESET
CSB 'H'
1 1 1 1 0 0 0 0 BLKCTL
1 1 1 1 1 1 0 0 APCTL
1 1 0 0 1 1 0 0 Display ON
RAM write sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
Description
CSB 'L'
DISCTL
1 1 0 1 0 0 1 1 Display Control
BLKCTL
1 1 1 1 0 0 0 0 BLKCTL
APCTL
1 1 1 1 1 1 0 0 APCTL
MODESET 1 1 0 0 1 1 0 0 Display ON
ADSET
0 0 0 0 0 0 0 0 RAM address set
Display Data * * * * * * * * Display data
CSB 'H'
DISPOFF sequence
Input
DATA
D7 D6 D5 D4 D3 D2 D1 D0
CSB 'L'
MODESET _{1 1 0 0 0 1 0 0}
CSB 'H'
Description
Display OFF
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