PT6547 Datasheet, PDF (6/35 Pages) Princeton Technology Corp – LCD Driver IC with Key Input Function

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LCD Driver IC with Key Input Function
PT6547
PIN DESCRIPTON
Pin Name
I/O
Description
Pin No.
SG1/P1 to SG8/P8 O Segment Driver/General Purpose Output Pins
1 to 8
SG9 to SG73 O Segment Driver Output Pins
9 to 73
SG74/COM4
COM1 to COM3
SG75/KS1,
SG76/KS2
O
Common/Segment Driver Output Pins
This pin can used as segment output pin in 1/3 duty.
O Common Driver Output Pins
O Key Scan/Segment Driver Output Pins
74
77 to 75
78, 79
KS3 to KS6
O Key Scan Output Pins
80 to 83
KI1 to KI5
I Key Scan Input Pins
84 to 88
VDD
VLCD
VLCD1
- Power Supply
89
- LCD Driver Power Supply
90
LCD Drive 2/3 Bias Voltage Power Supply
- Must be connected to VLCD2 when a 1/2 bias drive scheme is
91
used.
VLCD2
LCD Drive 1/3 Bias Voltage Power Supply
- Must be connected to VLCD1 when a 1/2 bias drive scheme is
92
used.
VSS
- Ground Pin
93
TEST
OSC
/RES
I This pin must be connected to ground.
94
Oscillator Input/Output Pin
I/O An oscillator circuit is formed by connecting an external resistor 95
and capacitor at this pin.
I
Reset Input Pin
When this pin is set to “Low”, reset to initial state.
96
DOUT
Data Output Pin (see Note)
O This pin outputs serial data at the falling edge of the shift clock
97
(starting from the lower bit).
Chip Enable Input Pin
STB
I
The data input after the STB has fallen is processed as a
command.
98
When this pin is “High”, CLK is ignored.
Clock Input Pin
CLK
I This pin reads serial data at the rising edge and outputs data at 99
the falling edge.
Data Input Pin
DIN
I This pin inputs serial data at the rising edge of the shift clock
100
(starting from the lower bit).
Note: This pin is open-drain output, a pull-up resistor of between 1K and 10KΩ is required.
PT6547 V1.2
-6-
January, 2006