BU9796FS-E2 Datasheet, PDF (10/18 Pages) Rohm – Standard Segment Drivers

BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2
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
regi st er
Command
Data Decoder
serial inter face
IF FILTER
SDA
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
I GND
VDD
1
I Power supply
VLCD
SEG0-35
COM0-7
2
4-24
33-46
25-32
I 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.
10/15
2011.11 - Rev.B