LC75884 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
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LC75884 Datasheet PDF : 27 Pages
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LC75884E, LC75884W
Pin Functions
Pin
S1/P1
S2/P2
S3/P3
S4/P4
S5 to S53
COM1
COM2
COM3
COM4
Pin No.
LC75884E LC75884W
Function
1
2
3
4
5 to 53
79
80
1
2
3 to 51
Segment outputs for displaying the display data transferred by serial
data input.
The S1/P1 to S4/P4 pins can be used as general-purpose output ports
under serial data control.
54
52
55
53
Common driver outputs
56
54
The frame frequency fo is given by : fo = (fOSC/512)Hz.
57
55
Active
—
—
KS1/S54
KS2/S55
KS3 to KS6
58
59
60 to 63
Key scan outputs
Although normal key scan timing lines require diodes to be inserted in
56
the timing lines to prevent shorts, since these outputs are unbalanced
57
CMOS transistor outputs, these outputs will not be damaged by shorting
—
58 to 61 when these outputs are used to form a key matrix. The KS1/S54 and
KS2/S55 pins can be used as segment outputs when so specified by
the control data.
Key scan inputs
KI1 to KI5
64 to 68
62 to 66 These pins have built-in pull-down resistors.
H
Oscillator connection
OSC
75
73
An oscillator circuit is formed by connecting an external resistor and
—
capacitor at this pin.
CE
78
CL
79
DI
80
DO
77
RES
76
TEST
74
VLCD1
71
VLCD2
72
VDD
69
VLCD
70
VSS
73
76
Serial data interface connections to the controller. Note that DO, being
H
an open-drain output, requires a pull-up resistor.
77
CE :Chip enable
v
CL :Synchronization clock
78
DI :Transfer data
—
75
DO :Output data
—
Reset signal input
RES=low •••• Display off
Key scan disabled
74
All key data is reset to low
L
RES=high ••• Display on
Key scan enabled
However, serial data can be transferred when RES is low.
72
This pin must be connected to ground.
—
Used for applying the LCD drive 2/3 bias voltage externally. Must be
69
connected to VLCD2 when a 1/2 bias drive scheme is used.
—
Used for applying the LCD drive 1/3 bias voltage externally. Must be
70
connected to VLCD1 when a 1/2 bias drive scheme is used.
—
Logic block power supply connection. Provide a voltage of between 4.5
67
and 6.0V.
—
LCD driver block power supply connection. Provide a voltage of
68
between VDD–0.5 and 6.0V.
—
71
Power supply connection. Connect to ground.
—
I/O
Handling
when unused
q
OPEN
q
OPEN
O
OPEN
I
GND
I/O
VDD
I
I
GND
I
O
OPEN
I
VDD
I
—
I
OPEN
I
OPEN
—
—
—
—
—
—
No. 6086-7/27
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