PT6530 Datasheet, PDF (12/42 Pages) Princeton Technology Corp – LCD Driver IC

PT6530
4. PIN DESCRIPTION
Handling
Pin Name
I/O Active when
Description
unused
Segment outputs for displaying the display data transferred
S1/P1 ~ S8/P8
S9 ~ S73
O
-
OPEN
by serial data input.
The S1/P1 to S8/P8 pins can be used as general-purpose
output ports under serial data control.
COM1
Common driver outputs
COM2
COM3
O
-
OPEN
The frame frequency fo is given by: fo = (fosc/384)Hz.
The COM4/S74 pin can be used as a segment output in 1/3
COM4/S74
duty.
Key scan outputs
Although normal key scan timing lines require diodes to be
KS1/S75
KS2/S76
O
-
KS3 ~ KS6
OPEN
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.
KI1 ~ KI5
I
H
GND
Key scan inputs
These pins have built-in pull-down resistors.
Oscillator connection
OSC
I/O
-
VDD An oscillator circuit is formed by connecting an external
resistor and capacitor at this pin.
CE
I
H
Serial data interface connections to the controller. Note that
DO, being an open-drain output, requires a pull-up resistor.
CL
I
GND _{CE :Chip enable}
DI
I
-
CL :Synchronization clock
DI :Transfer data
DO
O
-
OPEN _{DO :Output data}
Reset signal input
/RES = low.....Display off
Key scan disabled
/RES
I
L
VDD All key data is reset to low
/RES = high....Display on
Key scan enabled
However, serial data can be transferred when /RES is low.
TEST
I
-
-
This pin must be connected to ground.
Used for applying the LCD drive 2/3 bias voltage externally.
VLCD1
I
-
OPEN 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.
VLCD2
I
-
OPEN Must be connected to VLCD1 when a 1/2 bias drive scheme
is used.
VDD
-
-
-
Logic block power supply connection. Provide a voltage of
between 4.5 and 6.0V.
VLCD
-
-
-
LCD driver block power supply connection. Provide a voltage
of between VDD -0.5 and 6.0V.
VSS
-
-
-
Power supply connection. Connect to ground.
Pin No.
1~8
9 ~ 73
77
76
75
74
78
79
80 ~ 83
84 ~ 88
95
98
99
100
97
96
94
91
92
89
90
93
V1.3
12
June 2010