PT6311
VFD Driver/Controller IC
DESCRIPTION
PT6311 is a Vacuum Fluorescent Display (VFD)
Controller driven on a 1/8 to 1/16 duty factor housed in
52-pin plastic QFP Package. Twelve segment output
lines, 8 grid output lines, 8 segment/grid output drive
lines, one display memory, control circuit, key scan
circuit are all incorporated into a single chip to build a
highly reliable peripheral device for a single chip micro
computer. Serial data is fed to PT6311 via a three-line
serial interface.
FEATURES
CMOS Technology
Low Power Consumption
Key Scanning (12 x 4 matrix)
Multiple Display Modes: (12 segments, 16 digits to
20 segments, 8 digits)
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8-Step Dimming Circuitry
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LED Ports Provide (5 channels, 20mA max.)
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4- Bits General Purpose Input Ports Provided
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Serial Interface for Clock, Data Input, Data Output,
Strobe Pins
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No External Resistors Needed for Driver Outputs
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Available in 52pins QFP and LQFP
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APPLICATIONS
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Microcomputer Peripheral Devices
BLOCK DIAGRAM
Con tro l
DIN
DOUT
CLK
STB
VDD
Ser ial
Data
Inter face
SG 1/KS 1
SG 2/KS 2
SG 3/KS 3
SG 4/KS 4
SG 5/KS 5
SG 6/KS 6
SG 7/KS 7
SG 8/KS 8
SG 9/KS 9
SG 10/KS 10
SG 11 /K S11
SG 12/KS 12
SG 13/G R1 6
SG 14/G R1 5
SG 15/G R1 4
SG 16/G R1 3
SG 17/G R1 2
SG 18/G R11
SG 19/G R1 0
SG 20/G R9
GR1
GR2
GR3
GR4
GR5
GR6
GR7
GR8
Displa y Memo ry
OS C
OS C
Ti ming Ge ner ato r
S egmen t Driver /
G rid Driver /
Ke y Scan O utput
SW1
SW2
SW3
SW4
Ge ner al
Inp ut
Reg iste r
Ke y Matrix Memory
LE D1
LE D2
LE D3
LE D4
LE D5
LED
Drive r
Gr id
Drive r
Dimming Cir cu it
K1 K2 K3 K4
VDD
GND
VE E
Tel: 886-66296288
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Fax: 886-29174598
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http://www.princeton.com.tw
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2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan