BU9797FUV-M Datasheet, PDF (17/28 Pages) Rohm – Integrated Buffer AMP for LCD Driving

BU9797FUV-M MAX 144 segments (SEG36×COM4)
Datasheet
Initialize sequence
Please follow below sequence after Power-on to set this LSI to initial condition.
Power on
STOP condition
START condition
Issue slave address
Execute Software Reset by sending ICSET command.
(Note) Each register value and DDRAM address, DDRAM data are random condition after power on till initialize sequence is executed.
Start sequence
Start sequence example1
No.
Input
1
Power on
2
wait 100µs
3
Stop
4
Start
5
Slave address
6
ICSET
7
BLKCTL
8
DISCTL
9
ICSET
10
ADSET
11
Display Data
Display Data
Display Data
12
Stop
13
Start
14
Slave address
15
MODESET
16
Stop
D7 D6 D5 D4 D3 D2 D1 D0
Descriptions
VDD=0 5V (Tr: max 5ms)
Initialize IC
Stop condition
Start condition
0 1 1 1 1 1 0 0 Issue slave address
1 1 1 0 1 0 1 0 Software Reset
1 1 1 1 0 0 0 0 Blink OFF
1 0 1 0 0 1 0 0 80Hz, Frame inv., Power save mode1
1 1 1 0 1 0 0 1 External clock input
0 0 0 0 0 0 0 0 RAM address set
* * * * * * * * address
* * * * * * * * address
00h to 01h
02h to 03h
* * * * * * * * address 22h to 23h
Stop condition
Start condition
0 1 1 1 1 1 0 0 Issue slave address
1 1 0 * 1 0 * * Display ON, 1/3bias
Stop condition
*: don‟t care
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26.Aug.2013 Rev.001