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LC75893M Datasheet(Hoja de datos) 6 Page - Sanyo Semicon Device

No. de Pieza. LC75893M
Descripción  1/3 Duty LCD Display Driver with Key Input Function
Descarga  23 Pages
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Fabricante  SANYO [Sanyo Semicon Device]
Página de inicio  http://www.ssdc-jp.com/eng/
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 6 page
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No. 5971-6/23
LC75893M
Pin Functions
Pin
Pin No.
Function
Active
I/O
Handling
when unused
S1/P1 to S4/P4
S5 to S14
COM1
COM2
COM3
KS1/S15
KS2/S16
KS3
KS4
KI1 to KI5
OSC
CE
CL
DI
DO
TEST
VDD1
VDD2
VDD
VSS
1 to 4
5 to 14
15
16
17
18
19
20
21
22 to 26
32
34
35
36
33
27
29
30
28
31
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/384) 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/S15 and KS2/S16
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
This pin must be connected to ground.
Used for applying the LCD drive 2/3 bias voltage externally. Must be
connected to VDD2 when a 1/2 bias drive scheme is used.
Used for applying the LCD drive 1/3 bias voltage externally. Must be
connected to VDD1 when a 1/2 bias drive scheme is used.
Power supply connection. Provide a voltage of between 4.5 and 6.0 V.
Power supply connection. Connect to ground.
H
H
O
O
O
I
I/O
I
I
I
O
I
I
I
Open
Open
Open
GND
VDD
GND
Open
Open
Open




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