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LCD Driver IC
PT6584
PIN DESCRIPTION
Handling
Pin No.
Pin Name I/O Active
when
Description
QFP
LQFP
unused
S1/P1
S2/P2
S3/P3
S4/P4
S4 ~ S53
COM1
COM2
COM3
COM4/S74
1
2
3
79
80
1
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.
O
O
-
-
OPEN
OPEN
4
2
5 ~ 53
54
55
56
57
3 ~ 51
52
53
54
Common driver outputs
The frame frequency fo is given by: fo = (fOSC/512)Hz.
55
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/S54 and KS2/S55
pins can be used as segment outputs when so specified by
the control data.
58
59
60 ~
63
56
57
58 ~
61
KS1/S54
KS2/S56
KS3 ~ KS6
O
-
OPEN
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.
64 ~
68
62 ~
66
KI1 ~ KI5
OSC
I
H
GND
VDD
I/O
-
75
73
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
CE
CL
DI
I
I
H
78
79
80
77
76
77
78
75
GND
I
-
-
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
76
74
/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 VLCD2 when a 1/2 bias drive scheme
is used.
TEST
I
I
-
-
-
74
71
72
69
VLCD1
OPEN
Used for applying the LCD drive 1/3 bias voltage externally.
Must be connected to VLCD1 when a 1/2 bias drive scheme
is used.
Logic block power supply connection. Provide a voltage of
between 3.3 and 6.0V.
VLCD2
VDD
I
-
-
OPEN
-
72
69
70
67
-
LCD driver block power supply connection. Provide a voltage
of between VDD-0.5 and 6.0V.
Power supply connection. Connect to ground.
VLCD
VSS
-
-
-
-
-
-
70
73
68
71
PT6584 V1.1
- 7 -
August, 2006
PTC [ PRINCETON TECHNOLOGY CORP ]
