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PT6554 Datasheet(PDF) 6 Page - Princeton Technology Corp

Part # PT6554
Description  LCD Driver IC
PDF  30 Pages
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Manufacturer  PTC [Princeton Technology Corp]
Direct Link  http://www.princeton.com.tw
Logo PTC - Princeton Technology Corp

PT6554 Datasheet(HTML) 6 Page - Princeton Technology Corp

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PT6554
V1.4
6
June 2010
PIN DESCRIPTION
Pin
Pin No.
Function
Active
I/O
Handling
when unused
SG1/P1 to
SG4/P4
SG5 to SG39
1 to 4
5 to 39
Segment outputs for displaying the display data
transferred by serial data input.
The SG1/P1 to SG4/P4 pins can be used as
general-purpose output ports under serial data control.
-
O
Open
COM1
COM2
COM3
COM4
40
41
42
43
Common driver outputs
The frame frequency fO is given by: fO=(fosc/512)Hz
-
O
Open
KS1/SG40,
KS2/SG41,
KS3 to KS6
44
45
46 to 49
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 from a key matrix. The
KS1/SG40 and KS2/SG41 pins can be used as segment
outputs when so specified by the control data
-
O
Open
KI1to KI5
50 to 54
Key scan inputs.
These pins have built-in pull-down resistors.
H
I
GND
OSC
60
Oscillator connection.
An oscillator circuit is formed by connecting an external
resistor and capacitor at this pin.
-
I/O
VDD
CE
CLK
DI
62
63
64
Serial data interface connections to the controller. Note
that DO, being an open-drain output, requires a pull-up
resistor.
CE: Chip enable
CLK: Synchronization clock
DI: Transfer data
DO: Output data
H
-
-
I
I
I
GND
DO
61
O
Open
TEST
55
This pin must be connected to ground.
-
I
-
VDD1
57
Used for applying the LCD drive 2/3 bias voltage
externally. Must be connected to VDD1 when a 1/2 bias
drive scheme is used.
-
I
Open
VDD2
58
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.
-
I
Open
VDD
56
Power supply connection. Provide a voltage of between
4.5 and 6.0V
-
-
-
VSS
59
Power supply connection. Connect to ground.
-
-
-



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