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LC75884W Datenblatt(PDF) 7 Page - Sanyo Semicon Device

Teilenummer LC75884W
Bauteilbeschribung  1/4 Duty LCD Display Drivers with Key Input Function
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Hersteller  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC75884W Datenblatt(HTML) 7 Page - Sanyo Semicon Device

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


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