PT6584 Datasheet, PDF (7/42 Pages) Princeton Technology Corp – LCD Driver IC

LCD Driver IC
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URL:http://www.princeton.com.tw
PT6584
PIN DESCRIPTION
Handling
Pin Name I/O Active when
Description
unused
S1/P1
S2/P2
S3/P3 O
-
S4/P4
S4 ~ S53
OPEN
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.
COM1
COM2
COM3
O
-
OPEN
Common driver outputs
The frame frequency fo is given by: fo = (fOSC/512)Hz.
COM4/S74
Key scan outputs
Although normal key scan timing lines require diodes to be
KS1/S54
KS2/S56 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/S54 and KS2/S55
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 3.3 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.
QFP
1
2
3
4
5 ~ 53
54
55
56
57
LQFP
79
80
1
2
3 ~ 51
52
53
54
55
58
56
59
57
60 ~ 58 ~
63
61
64 ~ 62 ~
68
66
75
73
78
76
79
77
80
78
77
75
76
74
74
72
71
69
72
70
69
67
70
68
73
71
PT6584 V1.1
-7-
August, 2006