BU91796MUF-M Datasheet, PDF (16/27 Pages) Rohm – Low Duty LCD Segment Driver for Automotive application

BU91796MUF-M MAX 80 segments (SEG20×COM4)
Datasheet
Initialize Sequence
Follow the Power-on sequence below to initialize condition.
Power on
↓
STOP condition
↓
START condition
↓
Issue slave address
↓
Execute Software Reset by sending ICSET command.
After Power-on and before sending initialize sequence, each register value, DDRAM address and DDRAM data are
random.
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
D7 D6 D5 D4 D3 D2 D1 D0
Descriptions
VDD=0→5V
(Tr: Min 1ms to Max 500ms)
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
1 1 1 1 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 1 External clock input
0 0 0 0 0 0 0 0 RAM address set
* * * * * * * * address
* * * * * * * * address
00h to 01h
02h to 03h
Display Data
↓
12
Stop
↓
13
Start
↓
14
Slave address
↓
15
MODESET
↓
16
Stop
(*: don‟t care)
* * * * * * * * address 12h to 13h
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
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