PT6314
Dot Character VFD Controller/Driver IC
DESCRIPTION
PT6314 is a VFD Controller/Driver IC utilizing CMOS
technology providing 80 segment outputs and 24 grid
outputs. It supports dot matrix displays of up to 16
columns x 2 lines, 20 columns x 2 lines or 24 columns
x 2 lines. PT6314 also features a character generator
ROM which stores 248 x 5 x 8 dos characters. Pin
assignments and application circuits are optimized for
easy PCB layout and cost saving advantages.
FEATURES
•
CMOS technology
•
Provides up to 80 x 8 display RAM
•
Capable of driving segment for cursor displays (48
units)
•
Built-in oscillation circuit
•
Parallel data input/output (switchable 4 or 8 bits) or
serial data input/output
•
Alphanumeric and symbolic display via the built-in
ROM (5 x 8 dots): 248 characters
•
Eight user-defined 5 x 8 dot character CGRAM
•
Display contents capability:
- 16 columns x 2(1) rows + 32(16) cursors
- 20 columns x 2(1) rows + 40(20) cursors
- 24 columns x 2(1) rows + 48(24) cursors
•
Custom ROM available (please contact PTC
APPLICATIONS
•
Electronic equipment with VFD display
•
Microprocessor peripherals
BLOCK DIAGRAM
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PT6314
CONTENTS
1.
APPLICATION CIRCUITS ........................................................................................................................................ 3
1.1 SERIAL INTERFACE ........................................................................................................................................... 3
1.2 i80 INTERFACE ................................................................................................................................................... 3
1.3 M68 INTERFACE ................................................................................................................................................. 4
2.
ORDER INFORMATION ........................................................................................................................................... 5
3.
PIN CONFIGURATION ............................................................................................................................................. 5
4.
PIN DESCRIPTION................................................................................................................................................... 6
4.1 DUTY RATIO SETTING ....................................................................................................................................... 8
4.2 SEGMENT SETTING ........................................................................................................................................... 8
4.3 VFD DISPLAY .................................................................................................................................................... 14
5.
FUNCTION DESCRIPTION .................................................................................................................................... 15
5.1 BLOCK FUNCTIONS ......................................................................................................................................... 15
5.2 DISPLAY DATA RAM (DDRAM) ........................................................................................................................ 16
5.3 CHARACTER GENERATOR ROM (CGROM) .................................................................................................. 18
5.4 CHARACTER GENERATOR RAM (CGRAM) ................................................................................................... 18
5.5 TIMING GENERATION CIRCUIT ...................................................................................................................... 19
5.6 VFD DRIVER CIRCUIT ...................................................................................................................................... 19
5.7 CURSOR/BLINK CONTROL CIRCUIT .............................................................................................................. 19
5.8 CPU INTERFACE (DATA TRANSFER) ............................................................................................................. 20
6.
INSTRUCTIONS ..................................................................................................................................................... 23
6.1 “CLEAR DISPLAY” INSTRUCTION ................................................................................................................... 23
6.2 “CURSOR/ HOME” INSTRUCTION .................................................................................................................. 24
6.3 “ENTRY MODE” INSTRUCTION ....................................................................................................................... 24
6.4 “DISPLAY ON/OFF” INSTRUCTION.................................................................................................................. 25
6.6 “FUNCTION SET” I INSTRUCTION ................................................................................................................... 26
6.7 “CGRAM ADDRESS SET” INSTRUCTION ....................................................................................................... 27
6.8 “DDRAM ADDRESS SET INSTRUCTION ........................................................................................................ 27
6.9 “READ BUSY FLAG AND ADDRESS” INSTRUCTION .................................................................................... 27
6.10 “WRITE DATA TO CGRAM OR DDRAM” INSTRUCTION ............................................................................. 27
6.11 “READ DATA FROM CGRAM OR DDRAM” INSTRUCTION ......................................................................... 28
6.12 POWER ON RESET......................................................................................................................................... 28
6.13 CGRAM STROKE FLOWCHART .................................................................................................................... 29
6.14 DDRAM STROKE FLOWCHART .................................................................................................................... 29
7.
ABSOLUTE MAXIMUM RATINGS ......................................................................................................................... 30
8.
RECOMMENDED OPERAING RANGE ................................................................................................................. 30
9.
ELECTRICAL CHARACTERISTICS ....................................................................................................................... 31
10. SWITCHING CHARACTERISTICS ........................................................................................................................ 31
11. SWITCHING TIMING .............................................................................................................................................. 32
11.1 TIMING 1 REQUIREMENTS ............................................................................................................................ 32
11.2 TIMING 2 REQUIREMENTS ............................................................................................................................ 34
11.3 TIMING 3 REQUIREMENTS ............................................................................................................................ 35
11.4 TIMING 4 REQUIREMENTS ............................................................................................................................ 36
12. FONT TABLE .......................................................................................................................................................... 37
12.1 ENGLISH/JAPANESE CHARACTER FONT TABLE (PT6314-001) ............................................................... 37
12.2 ENGLISH /EUROPEAN CHARACTER FONT TABLE (PT6314-002) ............................................................. 38
12.3 UROPEAN CHARACTER FONT TABLE (PT6314-007) ................................................................................. 39
12.4 JAPANESE CHARACTER FONT TABLE (PT6314-008) ................................................................................ 40
13. PACKAGE INFORMATION .................................................................................................................................... 41
IMPORTANT NOTICE ..................................................................................................................................................... 42
V1.5
2
October 2009
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