BU9795AKS2 Datasheet, PDF (5/40 Pages) Rohm – Standard LCD Segment Drivers

BU9795Axxx Series MAX 140 segments (SEG35×COM4)
●Block Diagrams / Pin Configurations / Pin Descriptions – continued
Datasheet
BU9795AKS2
VDD
VLCD
INHb
OSCIN
VSS
LCD voltage generator
COM0…… COM3
SEG0 … SEG34
Common
driver
Segment
driver
＋
－
LCD BIAS
SELECTOR
＋
Common Blink timing
counter
generator
DDRAM
－
OSCILLATOR
Power On Reset
Command
register
Command
Data Decoder
Serial inter face
IF FILTER
TEST
CSB
SD
SCL
Figure 8. ブロック図
39
40
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
COM0
COM1
52
1
27
26
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
14
13
Figure 9. 端子配置図 (TOP VIEW)
端子名
INHb
TEST
OSCIN
SD
SCL
CSB
VSS
VDD
VLCD
SEG0-34
COM0-3
端子番号
13
12
7
10
9
8
6
5
4
14-28,
30-36
38-50
51-52,
1-2
Table 1 端子説明
I/O
機能
I
Input terminal for turn off display
H : turn on display L : turn off display
I
Test input (ROHM use only)
Must be connect to VSS
External clock input
I Ex clock and Int clock can be changed by command.
Must be connect to VSS when use internal oscillation circuit.
I serial data input
I serial data transfer clock
I Chip select : ”L” active
GND
Power supply
Power supply for LCD driving
O SEGMENT output for LCD driving
O COMMON output for LCD driving
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TSZ02201-0A0A2D300020-1-2
12.July.2012 Rev.002