VACUUM FLUORESCENT DISPLAY
MODULE
SPECIFICATION
MODEL ： CU209-TW202A
SPECIFICATION NO. : DS-1027-0000-00
DATE OF ISSUE : June 20 , 2003(00)
R E V I S I O N :
Published by
NORITAKE ITRON Corp. / Japan
http://www.noritake-itron.jp/
This specification is subject to change without prior notice.
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Index
1. General Description............................................................................................................................. 3
1.1 Application ..................................................................................................................................... 3
1.2 Construction................................................................................................................................... 3
1.3 Drawing.......................................................................................................................................... 3
2. Absolute Maximum Ratings................................................................................................................. 3
3. Electrical Ratings................................................................................................................................. 3
4. Electrical Characteristics ..................................................................................................................... 3
5. Optical Specifications .......................................................................................................................... 4
6. Environmental Specifications .............................................................................................................. 4
7. Functional Descriptions ....................................................................................................................... 4
7.1 Character data write....................................................................................................................... 4
7.2 Control data write........................................................................................................................... 4
7.2.1 BS : Back Space (08 Hex)....................................................................................................... 4
7.2.2 HT : Horizontal Tab (09 Hex)................................................................................................... 5
7.2.3 LF : Line Feed (0A Hex) .......................................................................................................... 5
7.2.4 FF : Form Feed (0C Hex) ........................................................................................................ 5
7.2.5 CR : Carriage Return (0D Hex) ............................................................................................... 5
7.2.6 CLR: Clear (0E Hex) ............................................................................................................... 5
7.2.7 CAN: Cancel (0F Hex)............................................................................................................. 5
7.2.8 DC1 : Device Control 1 (11 Hex) … Character over write mode........................................... 5
DC2 : Device Control 2 (12 Hex) … Scroll up mode.............................................................. 5
DC3 : Device Control 3 (13 Hex) … Horizontal Scroll mode.................................................. 5
7.2.9 DC4 : Device Control 4 (14 Hex) … Cursor is turned to invisible.(Default).............................. 5
DC5 : Device Control 5 (15 Hex) … Cursor is displayed as a blinking all dot character............ 5
DC6 : Device Control 6 (16 Hex) … Cursor is turned to invisible........................................... 5
DC7 : Device Control 7 (17 Hex) … Cursor is turned to invisible........................................... 5
7.2.10 CT0 : Character Table 0 (18 Hex) … International character font ......................................... 6
CT1 : Character Table 1 (19 Hex) … KATAKANA character font .......................................... 6
EUR: Euro Currency mark (1AH) … Euro Currency mark ..................................................... 6
7.2.11 ESC : Escape (1B Hex) ...................................................................................................... 6
7.3 Test Mode ................................................................................................................................... 9
7.4 Character and control code table .............................................................................................. 10
7.4.1 Inter national character font ................................................................................................ 10
7.4.2 KATAKANA character font.................................................................................................. 11
8. Timing................................................................................................................................................ 12
8.1 Parallel interface Timing........................................................................................................... 12
8.2 Serial Interface Timing ............................................................................................................. 12
9. BUSY Time........................................................................................................................................ 13
10. Jumper wires ................................................................................................................................... 14
11. Connector Pin assignment .............................................................................................................. 15
11.1 16pin Connector ............................................................................................................................ 15
11.2 3pin Connector .............................................................................................................................. 15
12. Outline dimension............................................................................................................................ 16
Notice for the Cautious Handling VFD Modules ....................................................................................17
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1. General Description
1.1 Application
Readout of computer, micro-computer, communication terminal and automatic instruments.
1.2 Construction
Single board display module consists of 20 character (1 x 20) VFD, refresh memory,
character generator, control circuit, DC/DC converter and all necessary control logics.
Interface level is TTL compatible and the module can be connected to the CPU bus of host
directly.
1.3 Drawing
See attached drawings.
2. Absolute Maximum Ratings
Parameter Symbol Min. Typ. Max. Unit Condition
Logic Input Voltage VI 0 - Vcc+0.3 VDC VI<Vcc+0.2
Power Supply Voltage Vcc 0 - 6.5 VDC -
3. Electrical Ratings
Parameter Symbol Min. Typ. Max. Unit Condition
"H" VIH 2.0 - VCC
Logic Input Voltage "L" VIL 0 - 0.8
VDC Vcc=5.0V
TA=25degrees
Power Supply Voltage Vcc 4.75 5.0 5.25 VDC -
4. Electrical Characteristics
Measuring Conditions : TA (Ambient temperature)=25degrees, Vcc=5.0V
Parameter Symbol Min. Typ. Max. Unit Condition
"H" VOH 4.4 - - VDC IOH=-2mA
Logic Output Voltage "L" VOL - - 0.5 VDC IOL=2mA
Power Supply Current Icc - 240 320 mADC -
Note : Icc shows the current at all dots in the screen are lighted.
Slow start power supply may cause erroneous operation. The rise time of Vcc should
not exceed 100 ms.
Icc might be anticipated twice as usual at power on rush.
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5. Optical Specifications
Number of characters : 20(1 lines x 20 chars)
Matrix format : 5 x 7 dot
Display area : 112.6 x 8.85mm (X x Y)
Character size : 4.3x 8.85 mm (X x Y)
Character pitch : 5.7 mm
Dot size : 0. 66x 1.05 mm (X x Y)
Dot pitch : 0.91x 1.3 mm (X x Y)
Luminance : 350 cd/m2 (102fL) Min.
Color of illumination : Green(Blue-green)
6. Environmental Specifications
Operating temperature : -40 to +85 degrees
Storage temperature : -40 to +85 degrees
Operating humidity : 20 to 80 % RH ( No Condensation )
Vibration(No operating) : 10 to 55 Hz, all amplitude 1mm, X,Y,Z 3direction
30 minutes
Shock(No operating) : 100G, 9ms, X Y Z 3direction
7. Functional Descriptions
This module provides the functions of 8 bit parallel and serial data write.
Each control data and character fonts are shown in Character Table 0 and Character Table 1.
All data write should be done during BUSY line is low.
CS
WR Function Bus direction
0 Data write Module Host
1 X No operation Module X Host
:Rising edge of pulse X: Do not care
7.1 Character data write
Character font is displayed on the screen, and HT is executed. (see para. 7.2.2 HT)
7.2 Control data write
Detail of control data are shown in this clause. The term "Cursor" is the same meaning of "
Writing Position".
7.2.1 BS : Back Space (08 Hex)
The cursor moves one character to the left.
At the left end, the cursor doesn't move.
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7.2.2 HT : Horizontal Tab (09 Hex)
The cursor moves one character to the right.
At the right end, the cursor motion depends upon DC1, DC2 and DC3 mode.
DC1 : The cursor doesn’t move.
DC2 : The cursor doesn’t move.
DC3 : All displayed characters on the cursor line are scrolled to the left one character
and the right most position is cleared. The cursor doesn’t move.
7.2.3 LF : Line Feed (0A Hex)
All displayed characters are cleared. The cursor doesn’t move.
7.2.4 FF : Form Feed (0C Hex)
The cursor moves to the left end.
7.2.5 CR : Carriage Return (0D Hex)
The cursor moves to the left end.
7.2.6 CLR: Clear (0E Hex)
All displayed characters are cleared. The cursor doesn't move.
7.2.7 CAN: Cancel (0F Hex)
All displayed characters are cleared. The cursor doesn't move.
7.2.8 DC1 : Device Control 1 (11 Hex) … Automatic Carriage Return mode(Default)
When the cursor reaches the right end, additional data write makes automatic
carriage return.
DC2 : Device Control 2 (12 Hex) … Over-Write mode
When the cursor reaches the right end, additional data write makes over-write at the
right most position.
DC3 : Device Control 3 (13 Hex) … Horizontal Scroll mode
When the right end, the next data write makes the cursor overflow , further data
write shifts all displayed characters to left by one , and those new characters are
written at the right most position. Writing position moves to the left end when DC1 or
DC2 mode selects in DC3 mode.
Alternative LINE ENDING MODE is specified by DC1, DC2 and DC3 when character data or
HT is written. Just after power on or initialize, DC1 is selected (Default Mode).
7.2.9 DC4 : Device Control 4 (14 Hex) … Cursor is turned to invisible.(Default)
DC5 : Device Control 5 (15 Hex) … Cursor is displayed as a blinking all dot character.
DC6 : Device Control 6 (16 Hex) … Cursor is turned to invisible.
DC7 : Device Control 7 (17 Hex) … Cursor is turned to invisible.
Above four codes control the cursor rendition. DC4 is default mode. The mode is maintained
until other mode is selected. The blinking speed can be varied by ESC sequence. (see para.
7.2.10 ESC)
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7.2.10 CT0 : Character Table 0 (18 Hex) … International character font
CT1 : Character Table 1 (19 Hex) … KATAKANA character font
Above two codes select Character Table. Just after power on, CT0 is selected(Default Mode ).
Any characters from those 2 tables can be displayed on the screen by the bank selection.
EUR: Euro Currency mark (1AH) … Euro Currency mark
Euro Currency mark is stored instead of Blank in character code location AD Hex of CT0.
This is replaced to Blank if CT0 is selected again, and it affect displayed character of AD Hex.
7.2.11 ESC : Escape (1B Hex)
The character or data strings succeeding of ESC code control the various functions such as
user definable font, cursor addressing, screen luminance control, selection of data writing
mode, blink speed control and initialize.
(1) User Definable Font (UDF)
Users desired fonts can be defined by software. The fonts will be memorized in RAM of the
CPU.
Syntax : ESC (1B Hex) + "C" (43 Hex) + CHR + PT1 + PT2 + PT3 + PT4 + PT5
Any 5x7 dot patterns consisted of data from PT1 thru PT5 can be stored in character code
location specified by CHR.
Maximum number of UDF are 16 characters at once. Storing more than 16 will kill the oldest
font. However, within the 16 character codes where already defined by UDF, the over-write-
latest font replaces the former font.
1st byte : ESC(1B Hex)
2nd byte : "C"(43 Hex)
3rd byte : CHR(00 Hex to FF Hex)
Specify the character code location from 00 Hex to FF Hex by CHR.
If CHR overlaps the control codes such as BS, HT, etc. , the control function will
be lost. And therefore, the overlap to the ESC code may not avail further UDF.
4th to 8th byte : PT 1 through PT5
Specify ON or OFF of 35 dot position (5x7 dot).
Following table shows the relation of dot position and the data formation ("1" = dot
turn on, "0" = dot turn off)
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7(MSB) 6 5 4 3 2 1 0(LSB)
4th byte P8 P7 P6 P5 P4 P3 P2 P1
5th byte P16 P15 P14 P13 P12 P11 P10 P9
6th byte P24 P23 P22 P21 P20 P19 P18 P17
7th byte P32 P31 P30 P29 P28 P27 P26 P25
8th byte * * * * * P35 P34 P33
* : don't care
Following is the dot assignment.
P1 P2 P3 P4 P5
P6 P7 P8 P9 P10
P11 P12 P13 P14 P15
P16 P17 P18 P19 P20
P21 P22 P23 P24 P25
P26 P27 P28 P29 P30
P31 P32 P33 P34 P35
After execution of above sequence, a defined font will be stored in the character code location
"CHR" (Hex)
Following is an example of UDF sequence.
Example : "!" dot pattern should be stored in character code location A0 Hex.
● P3
● P8
● P13
● P18
● P33
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Assign turn on dot number to the bit table as follows.
b7 b6 b5 b4 b3 b2 b1 b0 Data (Hex)
4th byte 1 0 0 0 0 1 0 0 84
5th byte 0 0 0 1 0 0 0 0 10
6th byte 0 0 0 0 0 0 1 0 02
7th byte 0 0 0 0 0 0 0 0 00
8th byte 0 0 0 0 0 0 0 1 01
Then Syntax should be written : 1B + 43 + A0 + 84 + 10 + 02 + 00 + 01 (Hex)
(2) Cursor Moving
The cursor can be moved to any position of the screen by following ESC sequence.
Syntax : ESC (1B Hex) + "H" (48 Hex) + 1 Byte data
Left end 2nd 3rd ------------- Right end
00 01 02 ------------- 13
Data = 14 Hex to FF Hex : The cursor doesn't move.
(3) Luminance Control
The screen luminance can be varied by following ESC sequence.
Just after power on, the screen luminance is set to 100%.
Syntax : ESC (1B Hex) + " L " (4C Hex) + 1 Byte data
Data = 00 Hex to 3F Hex : approx. 25%
40 Hex to 7F Hex : approx. 50%
80 Hex to BF Hex : approx. 75%
C0 Hex to FF Hex : 100%
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(4) Selection of Writing Mode
Flicker less Mode can be selected by following ESC sequence.
Syntax : ESC (1B Hex) + "S" (53 Hex) … Flicker less Mode
Within Flicker less Mode, although BUSY might become longer, flicker less-high speed-
continuous-data write can be achieved since refreshing of the screen has priority over the
data acceptance.
Quick data write with minimum BUSY time will be given by Quick Write Mode since the
data acceptance has the priority over the refreshing of the screen.
Within this mode, continuous high speed data write may cause flicker display.
Note :
When serial data write with high speed baud rate at Flickerless Mode, it may have the
read error of the data. Busy check within Flickerless Mode or setting to the Quick Write
Mode is recommended for serial data write.
Just after power on or initialize, Quick Write Mode is selected until other mode is set. After
selected Flickerless Mode, Quick Write Mode can't be selected unless otherwise initialize.
(5) Blink Speed Control
Blinking speed of cursor can be varied by following ESC sequence.
Syntax : ESC (1B Hex) + "T" (54 Hex) + 1 Byte Data
Data = 00 Hex … 256
FF Hex … 255
FE Hex … 254
:
01 Hex … 1
Period of Blinking = Data Value x Approx.14.5 mS
At power on default, 20 (14 Hex) is set to data.
(6) Initialize
All displayed characters and all setting factors are cleared by following ESC sequence.
Syntax : ESC (1B Hex) + "I" (49 Hex)
Execution of above sequence, module is reset as just after power on.
7.3 Test Mode
Test Mode is set by keeping SIN (T0) is low for more than 100mS at power on or initialize.
During Test Mode, all character fonts are displayed automatically, and no any data are
acceptable.
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7.4 Character and control code table
Following 2 character tables can be selected. ( see para. 7.2.9 )
7.4.1 Inter national character font
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
1
0
A
1
0
0
0
8
1
0
1
1
B
1
0
0
1
9
1
1
0
0
C
1
1
0
1
D
1
1
1
0
E
1
1
1
1
F
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 A
1011 B
1100 C
1101 D
1110 E
1111 F
DDDD
3210
D7
D6
D5
D4
DC1
DC2
DC5
DC6
CT0
CT1
ESC
HT
BS
D
C
C
L
4
R
SP
C
D
R
C
F
7
F
CFX101
LF
DC3
CAN
EUR
Character Table 0
Note: When EUR(1AH) is selected, Euro Currency mark is stored instead of Blank in
character code location AD Hex of CT0. This is replaced to Blank if CT0 is selected again,
and it affect displayed character of AD Hex.
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7.4.2 KATAKANA character font
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
1
0
A
1
0
0
0
8
1
0
1
1
B
1
0
0
1
9
1
1
0
0
C
1
1
0
1
D
1
1
1
0
E
1
1
1
1
F
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 A
1011 B
1100 C
1101 D
1110 E
1111 F
DDDD
3210
D7
D6
D5
D4
DC1
DC2
DC5
DC6
CT0
CT1
ESC
HT
BS
D
C
C
L
4
R
SP
C
D
R
C
F
7
F
CFX102
LF
DC3
CAN
EUR
Character Table 1
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8. Timing
8.1 Parallel interface Timing
・・
CS
WR
D0～D7
BUSY
TW* : see para 9. BUSY TIME
TW*Max 200nSMin 2μs
Min 100nS Min 10nS
Min 0nSMin 160nSMin 0nS
Valid
8.2 Serial Interface Timing
Serial data write, asynchronous-8bit TTL level is also acceptable.
Following baud rates can be selected by combination of the Jumper wires.
( see para. 10. Jumper wires )
600, 1200, 2400, 4800, 9600, 19200 BPS
Besides, parity bit-even, odd and non parity can be selected by 2 jumper wires.
( see para 10. Jumper wires )
STOP
STO P
SIN
non Parity
SIN
with Parity
STRT D0 D1 D2 D3 D4 D5 D6 D7
STRT D0 D1 D2 D3 D4 D5 D6 D7 PRTY
BUSY
Td TW *
STRT : Start Bit
D0 : LSB
:
D7 : MSB
PRTY : Parity Bit
STOP : Stop Bit
Td : 10uS ( Typ. ) at Quick Write Mode
0uS ( Min. ) ～ 450uS ( Max. ) at Flicker less Mode
TW* : see para. 9. BUSY Time
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9. BUSY Time
Input data execution time ( TW* ) at Quick Write Mode are shown as follows.
Excution time (TW)
Data DC1,2 Mode DC3 Mode
Data Writing
Mode
Character Data, HT, LF 200 uS
(MAX.)
600 uS (MAX.)
at scrolling
BS,FF,CR,CT0,CT1,EUR
DC1,DC2,DC3,DC4,DC5,DC6,DC7 200 uS (MAX.)
CLR 500 uS (MAX.)
CAN 300 uS (MAX.)
1st byte 200 uS (MAX.)
“C” 200 uS (MAX.)
“I” 1200 uS (MAX.)
2nd
byte Expect”C”,”I” 200 uS (MAX.)
ESC
3rd byte ～ 200 uS (MAX.)
Quick Write
Mode
Above execution time are only talking about Quick Write Mode as mentioned.
Within Flicker less Mode , Approximately 2 to 15 times of above table should be considered .
Operating with Flicker less Mode, therefore, always watching of BUSY line is recommended.
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10. Jumper wires
Position of jumper wire
JA J0 J1 J2 J4J3
PCB Parts Side
Jumper Function Table
JA J4 J3 J2 J1 J0 Function
X X X 1 1 1 19200 BPS
X X X 1 1 0 9600 BPS
X X X 1 0 1 4800 BPS
X X X 1 0 0 2400 BPS
X X X 0 1 1 1200 BPS
X X X 0 1 0 600 BPS
X X X 0 0 1 600BPS
X X X 0 0 0
Baud rate
600BPS
X 1 1 X X X Even Parity
X 1 0 X X X Odd Parity
X 0 X X X X
Parity selection
Non Parity
0 X X X X X International Font(CT0)
1 X X X X X Character fonts selection JIS Font(CT1)
0 1 1 1 1 1 Setting at Factory
0 : short 1 : open X : Don’t care
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11. Connector Pin assignment
11.1 16pin Connector
Connection Connection
No. Terminal Parallel Serial No. Terminal Parallel Serial
1 D7 ○ NC 2 D6 ○ NC
3 D5 ○ NC 4 D4 ○ NC
5 D3 ○ NC 6 D2 ○ NC
7 D1 ○ NC 8 D0 ○ NC
9
WR ○ NC 10
CS ○ NC
11 SIN/T0 NC ○ 12 BUSY ○ ○
13 GND ○ ○ 14 GND ○ ○
15 VCC ○ ○ 16 VCC ○ ○
○ :Connection
NC : No Connection
11.2 3pin Connector
123
Connection
No. Terminal Parallel Serial
1 VCC ○ ○
2 SIN/T0 NC ○
3 GND ○ ○
○ :Connection
NC : No Connection
1
216
15
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12. Outline dimension
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Notice for the Cautious Handling VFD Modules
Handling and Usage Precautions:
Please carefully follow the appropriate product application notes for proper usage, safety handling, and operation standards for
maximum performance.
[VFD tubes are made of glass]
• Because the edges of the VFD glass-envelop are not smooth, it is necessary to handle carefully to avoid injuries to your
hands
• Please avoid breaking the VFD glass-envelop to prevent injury from sharp glass particles.
• The tip of the exhaust pipe is fragile so avoid shock from impact.
• It is recommended to allow sufficient open space surrounding the exhaust pipe to avoid possible damage.
• Please design the PCB for the VFD-module within 0.3 mm warping tolerance to avoid any forces that may damage the
display due to PCB distortion causing a breakdown of the electrical circuit leading to VFD failure.
[High voltage]
• Avoid touching conductive electrical parts, because the VFD-module uses high voltage exceeding approx.35 volts.
• Even when electric power is turned off, it may take more than one minute for the electrical current to discharge.
[Electrostatic charge]
• VFD-modules needs electrostatic free packaging and protection from electrostatic charges during handling and usage.
[Structure]
• During operation, VFD and VFD-modules generate heat. Please consider sufficient heat radiation dissipation using
heat sink solutions.
• We prefer to use UL grade materials or components in conjunction with VFD-modules.
• Wrap and twist motion causes stress and may break VFDs & VFD modules. Please adhere to allowances within
0.3mm at the point of attachment.
[Power]
• Apply regulated power to the VFD-module within specified voltages to protect from failures.
• Because some VFD-modules may consume in rush current equal to twice the typical current at power-on timing,
we recommend using a sufficient power capability and quick starting of the power regulator.
• VFD-module needs a specified voltage at the point of connection. Please use an adequate power cable to avoid a
decrease in voltage. We also recommend inserting a power fuse for extra protection.
[Operating consideration]
• Illuminating phosphor will decrease in brightness during extended operation. If a fixed pattern illuminates for an
extended period,( several hours), the phosphor efficiency will decrease compared to the non operating phosphor
causing a non uniform brightness among pixels. Please consider programming the display patterns to use all phosphor
segments evenly. Scrolling may be a consideration for a period of time to refresh the phosphor condition and improve
even illumination to the pixels.
• We recommend using a signal cable 30cm or less to avoid some possible disturbances to the signal.
[Storage and operating environment]
• Please use VFD-modules under the recommended specified environmental conditions. Salty, sulfur and dusty
environments may damage the VFD-module even during storage.
[Discard]
• Some VFDs contain a small amount of cadmium in the phosphor and lead in the solder. When discarding VFDs or
VFD-modules, please adhere to governmental related laws or regulations.
[Others]
• Although the VFD-module is designed to be protected from electrical noise, please plan your circuitry to exclude as
much noise as possible.
• Do not reconstruct or repair the VFD-module without our authorization. We cannot assure the quality or reliability of
unauthorized reconstructed VFD-modules.
Notice:
･We do not authorize the use of any patents that may be inherent in these specifications.
･Neither whole nor partial copying of these specifications are permitted without our approval.
If necessary , please ask for assistance from our sales consultant.
･This product is not designed for military, aerospace, medical or other life-critical applications. If you choose to use this product for
these applications, please ask us for prior consultation or we cannot take responsibility for problems that may occur.
