BU9799KV Datasheet, PDF (17/28 Pages) Rohm – Standard LCD Segment Driver

BU9799KV MAX 200 segments (SEG50×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.
*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
EVRSET1
10
EVRSET2
↓
11
ICSET
↓
12
ADSET
↓
13
Display Data
Display Data
Display Data
↓
14
Stop
↓
15
Start
↓
16
Slave address
↓
17
MODESET
↓
18
Stop
D7 D6 D5 D4 D3 D2 D1 D0
Descriptions
VDD=0→5V (Tr=0.1ms)
Initialize IC
Stop condition
Start condition
0 1 1 1 1 1 0 0 Issue slave address
1 1 1 0 1 * 1 0 Software Reset
11110 * 01
10100000
11100001
11111001
11101 * 01
0 0 0 0 0 0 0 0 RAM address set
* * * * * * * * address
* * * * * * * * address
00h - 01h
02h - 03h
* * * * * * * * address 12h - 13h
Stop condition
Start condition
0 1 1 1 1 1 0 0 Issue slave address
1 1 0 0 1 0 * * Display ON
Stop condition
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23.Jan.2015 Rev.003