BU9795AKV_11 Datasheet, PDF (10/15 Pages) Rohm – Standard Segment Drivers

BU9795AKV,BU9795AFV,BU9795AGUW,BU9794AKV,BU97950FUV
Technical Note
<BU97950FUV>
●Block Diagram
VLCD
VSS
LCD voltage generator
＋
－
＋
LCD
－
BIAS
SELECTOR
＋
－
＋
－
COM0……COM7
SEG0……SEG34
common
driver
Segment
driver
common
counter
DDRAM
VDD
OSCILLATOR
Power On Reset
Command
register
Command
Data Decoder
serial inter face
IF FILTER
SD A
SCL
Fig.12 Block Diagram (BU97950FUV)
●Pin Arrangement
Fig.13 Pin Arrangement (BU97950FUV)
●Terminal Description
Terminal
Terminal No.
SDA
48
SCL
47
I/O
I/O
serial data input
register read data output port
I serial data transfer clock
Function
VSS
3
- GND
VDD
1
- Power supply
VLCD
SEG0-35
COM0-7
2
4-24
33-46
25-32
- Power supply for LCD driving
O SEGMENT output for LCD driving
O COMMON output for LCD driving
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© 2011 ROHM Co., Ltd. All rights reserved.
10/14
2011.03 - Rev.A