Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
LCD Driver IC with Key Input Function
PT6547
DESCRIPTION
PT6547 is a high performance Liquid Crystal Display (LCD) Driver IC utilizing CMOS Technology
specially designed with Key Input Function. It can drive up to a maximum of 300 segments and control
up to 8 general purpose output ports. It includes a Key Scan Circuit that can support up to 30 key inputs
and provides On-Chip Voltage Detection Type Reset Circuit which prevents incorrect display. Display
Data can be directly displayed without using any decoder. PT6547 also supports 1/3 to 1/4 duty-1/2
bias and 1/3 to 1/4 duty-1/3 bias drive techniques. Pin assignments and application circuit are
optimized for easy PCB Layout and cost saving advantages.
FEATURES
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CMOS Technology
1/3 duty and 1/4 duty Drive Techniques
1/2 bias and 1/3 bias Drive Techniques
Up to 228 segments using 1/3 duty and up to 300 segments using 1/4 duty
Up to 8 General Purpose Output Ports
Key input function for up to 30 keys [6(O) x 5(I)]
Serial interface for Clock, Data Input, Data Output, Strobe pins
Sleep Mode & All segment OFF function
On-Chip voltage detection type Reset circuit
Power Supply: 4.5V ~ 6.0V
/RES pin provided forcibly initializing the internal circuit
RC Oscillation Circuit
Available in 100 pins, LQFP Package
APPLICATION
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Electronic Equipment with LCD Display
PT6547 V1.2
-1-
January, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
LCD Driver IC with Key Input Function
PT6547
INPUT/OUPUT CONFIGURATIONS
The schematic diagrams of the input and output circuits of the logic section are shown below:
INPUT PIN: CLK, STB, DIN
VDD
VSS
INPUT PIN: KI1 TO KI5
VLCD
VDD
VSS
OUTPUT PIN: DOUT
VDD
VSS
PT6547 V1.2
-4-
January, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
LCD Driver IC with Key Input Function
PT6547
OUTPUT PIN: SG1/P1 TO SG8/P8, SG9 TO SG73, SG75/KS1,
SG76/KS2
VLCD
VLCD
VLCD1
VSS
VSS
VLCD2
OUTPUT PIN: KS3 TO KS6
VLCD
VSS
OUTPUT PIN: COM1 TO COM3, COM4/SG74
VLCD
VLCD1
VSS
VLCD2
PT6547 V1.2
-5-
January, 2006
Analogue and Mixed Signal
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