BU9795AFV-LB Datasheet, PDF (17/29 Pages) Rohm – Standard LCD Segment Drivers

BU9795AFV-LB MAX 108 segments (SEG27×COM4)
Datasheet
Initialize Sequence
Please follow sequence below after Power-On to set this device to initial condition.
Power on
↓
CSB ’H’ …I/F initialize condition
↓
CSB ’L’ …I/F Data transfer start
↓
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
1. Start sequence example 1
No.
Input
1
Power on
↓
2
wait 100us
↓
3
CSB ’H’
↓
4
CSB ’L’
↓
5
ICSET
↓
6
BLKCTL
↓
7
DISCTL
↓
8
ICSET
↓
9
ADSET
↓
10
Display Data
Display Data
D7 D6 D5 D4 D3 D2 D1 D0
11101 * 10
11110 * 01
10100110
11101000
00000000
********
********
Descriptions
VDD=0 to 5V (Tr=0.1ms)
Initialize IC
Initialize I/F data
I/F Data transfer start
Software Reset
RAM address MSB set
RAM address set
address
address
00h to 01h
02h to 03h
Display Data
********
↓
11
CSB ‘H’
↓
12
CSB ‘L’
↓
13
MODESET
110*10* *
↓
14
CSB ‘H’
address 22h to 00h
I/F Data transfer stop
I/F Data transfer start
Display ON
I/F Data transfer stop
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TSZ02201-0P4P0D300510-1-2
26.Feb.2014 Rev.002