16
KDV-3241Y/MP4339
/MP4439/MP5032
• PIN DESCRIPTION
Pin No.
Pin Name
I/O
Pin Description
1 ~ 12
SG1/P1 ~ SG12/P12
O
Segment Driver Output/General Purpose Output Ports
13 ~ 51
SG13 ~ SG51
O
Segment Driver Output Pins
52 ~55
COM1 ~ COM4
O
Common Driver Output Pins
56
VDD
-
Power Supply
57
VDD1
-
Power Supply.
This pin is used to apply a 2/3 LCD Drive Bias Voltage.
If the 1/2 Bias Drive Technique is used, this pin must be short to VDD2.
58
VDD2
-
Power Supply.
This pin is used to apply a 1/3 LCD Drive Bias Voltage.
If the 1/2 Bias Drive Technique is used, this pin must be short to VDD1.
59
VSS
-
Ground
60
OSC
I/O Oscillation Input / Output Pin
61
INH
I
Display OFF Control Pin.
If this pin is set to “LOW” (VSS), the display is forced to turn OFF. Output driver pins -- SG1/P1 to
SG12/P12, SG13 to SG51, COM1 to COM4 are set to “LOW”. If this pin is set to “HIGH” (VDD), the
display is turned ON. (see Note)
62
CE
I
Chip Enable Pin
63
CLK
I
Clock Input Pin
64
DI
I
Data Input Pin
CIRCUIT DESCRIPTION
COMMON
DRIVE R
CLOCK
GEN ERATOR
SE GME NT DR IV ER & LATCH
S HIFT REGIST ER
ADD RESS
DETECTOR
V DD1
COM1
D I
CLK
CE
COM2 COM3 COM4
S G51 S G50
S G13 S G12/P12
SG2/P2 SG1/P1
V DD2
/INH
OS C
VDD
VSS
OILNRPY004B (FRONT UNIT IC901)
• BLOCK DIAGRAM