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LC75804 Datasheet

  • LC75804

  • Sanyo Semicon Device [1/3, 1/4 Duty LCD Display Drivers wit...

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  • SANYO

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LC75804E, LC75804W
Pin Functions
Pin
Pin No.
LC75804E
LC75804W
Function
Segment outputs for displaying the display data transferred by serial
data input.
The S1/P1 to S8/P8 pins can be used as general-purpose output ports
under serial data control.
Common driver outputs
The frame frequency fo is given by : fo = (f
OSC
/384)Hz.
The COM4/S74 pin can be used as a segment output in 1/3 duty.
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/S75 and
KS2/S76 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
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.
This pin must be connected to ground.
Used for applying the LCD drive 2/3 bias voltage externally. Must be
connected to V
LCD
2 when a 1/2 bias drive scheme is used.
Used for applying the LCD drive 1/3 bias voltage externally. Must be
connected to V
LCD
1 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 V
DD
鈥?0.5 and 6.0V.
Power supply connection. Connect to ground.
Active
I/O
Handling
when unused
S1/P1 to
S8/P8
S9 to S73
COM1
COM2
COM3
COM4/S74
3 to 10
11 to 75
79
78
77
76
1 to 8
9 to 73
77
76
75
74
鈥?/div>
q
OPEN
鈥?/div>
q
OPEN
KS1/S75
KS2/S76
KS3 to KS6
80
81
82 to 85
78
79
80 to 83
鈥?/div>
O
OPEN
KI1 to KI5
86 to 90
84 to 88
H
I
GND
OSC
97
95
鈥?/div>
I/O
V
DD
CE
CL
DI
DO
100
1
2
99
98
99
100
97
H
v
鈥?/div>
鈥?/div>
I
I
I
O
OPEN
GND
RES
98
96
L
I
V
DD
TEST
V
LCD
1
V
LCD
2
V
DD
V
LCD
V
SS
96
93
94
91
鈥?/div>
鈥?/div>
I
I
鈥?/div>
OPEN
94
92
鈥?/div>
I
OPEN
91
89
鈥?/div>
鈥?/div>
鈥?/div>
92
95
90
93
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
No. 6266-7/37

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