BU97950FUV Datasheet, PDF (15/25 Pages) Rohm – Standard LCD Segment Drivers

BU97950FUV MAX 280 segments (SEG35×COM8)
●Initialize sequence
Please follow the sequence below after Power-On to set this device to initial condition.
Power on
↓
STOP condition
↓
START condition
↓
Issue Slave address
↓
Execute Software Reset by ICSET command
Each register value and DDRAM address is initialized to their default values.
DDRAM data is random after power on.
●Start sequence
○Start sequence example
No.
Input
1
Power on
↓
2
wait 100us
↓
3
Stop
↓
4
Start
5
Slave address
↓
6
ICSET
↓
7
DISCTL
↓
8
EVRSET
↓
9
ADSET
↓
10
Display Data
D7 D6 D5 D4 D3 D2 D1 D0
01111100
11110 * 1 *
11100010
11000000
00000000
********
Descriptions
VDD=0 to 5V (Tr=0.1ms)
Initialize IC
Stop condition
Start condition
Issue slave address
Software Reset
Unnecessary when initial value setup
(If you need to change the condition)
Unnecessary when initial value setup
(If you need to change the condition)
RAM address set
Address 00h
Display Data
********
↓
11
Stop
↓
12
Start
13
Slave address
01111100
↓
14
ICSET
11110 * 01
Address 22h
Stop condition
Start condition
Issue slave address
Display ON
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08.Sep.2015 Rev.004