AV2020 (ANAG VISION)
20 x 2 Character Display Module

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ANAG VISION
AV2020
20x2 Character
° 5x7 dots with cursor
° 1/16 duty
° +5V single supply
° Built in Controller
(KS0066 or Equivalent)
° B/L driven by pin1 and 2, 15 and 16 or A,K
Pin Assignment
No. Symbol
1 Vss
2 Vdd
3 V0
4 RS
5 R/W
6E
7-14
DB0-DB7
15 A*
16 K
Function
Gnd, 0V
+5V
LCD Drive
Function Select
Read/Write
Enable Signal
Data Bus Line
4.2V for LED
Power Supply for LED 0V
Mechanical Data
Item
Module Size
Viewing Area
Dot Size
Character Size
Standard Value
116.0 x 37.0
85.0 x 18.6
0.6 x 0.65
3.2 x 5.55
Unit
mm
mm
mm
mm
Absolute Maximum Rating
Item
Symbol
V-Module
Vdd-Vss
V-Input
Vss=0V, Vdd=5.0V
VI
Standard Value
Unit
min. typ. max.
-0.3 - - - 7.0
V
-0.3 - - - Vdd V
Electronical Characteristics
Item
Standard Value
Symbol Condit.
Unit
min. typ. max.
Input Voltage
Supply Curent
Vdd
Idd
Vdd=+5V 4.7 5.0 5.3 V
Vdd=+5V - - - 1.6 2.5 mA
Recommended LC Driving
Voltage for Standard Temp. Vdd-V0
Modules
0 °C
25 °C
50 °C
4.6 4.8 5.2
4.1 4.5 4.7 V
3.9 4.2 4.5
LED Forward Voltage
Vf 25 °C - - - 4.2 4.6 V
LED Forward Current
LED weiß Voltage *
If
ILED
25 °C
3.5 V
- - - 210 320 mA
30 40 50 mA
ANAG VISION
This data sheet is for reference only.
The color of the disply may vary slightly depending on different production lots and ambient light. We reserve the right to changes and improvments without prior notice.
Verfügbar STN:
CONRAD Best.-Nr:
gelb-grün
reflectiv positiv
183350
gelb-grün LED
positiv LED gelb
184748
blau negativ
LED weiß
181655
grau positv
LED weiß
181669
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AV2020 (ANAG VISION)
20 x 2 Character Display Module

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CHARACTER MODULE COMMANDS
COMMANDS/CODES/DISCRIPTION
CODE
COMMAND
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
DESCRIPTION
CLEAR
DISPLAY
RETURN
HOME
CLEAR THE DISPLAY AND RETURN THE
0 0 0 0 0 0 0 0 0 1 CURSOR TO THE HOME POSITION
(ADDRESS 0)
RETURN THE CURSOR TO THE HOME
00 00 00 0 01
POSITION (ADDRESS 0); ALSO RETURN A
SHIFTED DISPLAY TO THE HOME POSITION.
DDRAM CONTENTS REMAIN UNCHANGED.
ENTRY
MODE
SET
SET THE CURSOR`S MOVE DIRECTION
0 0 0 0 0 0 0 1 I/D S AND ENABLE/DISABLE THE DISPLAY
DISPLAY
ON/OFF
CONTROL
CURSOR &
DISPLAY
SHIFT
FUNCTION
SET
ANAGSET
TURN THE DISPLAY ON/OFF(D), OR
THE CURSOR ON/OFF(C), AND BLINK
0 0 0 0 0 0 1 D C B OF THE CHARACTER AT THE CURSOR
POSITION(B).
0 0 0 0 0 1 S/C R/L
MOVE THE CURSOR AND SHIFT THE
DISPLAY WITHOUT CHANGING DD
RAM CONTENTS.
0 0 0 0 1 DL N F
SET THE DATA WIDTH(DL), THE
NUMBER OF LINES IN DISPLAY(L),
AND THE CHARACTER FONT(F).
SET THE CG RAM ADDRESS. CG RAM
CG RAM
00 01
ACG
DATA CAN BE READ OR ALTERED
ADDRESS
AFTER MAKING THIS SETTING.
EXECUTING
TIME
(FOSC = 270KHZ)
82µS - 1.64MS
40µS - 1.64MS
FONT TABLE CHARACTER TYPES (STD. ENGL./JAP.)
UPPER 4BIT
LLLL LLLH LLHL LLHH LHLL LHLH LHHL LHHH HLLL HLLH HLHL HLHH HHLL HHLH HHHL HHHH
CG
LLLL RAM
(1)
LLLH ( 2 )
40µS
LLHL ( 3 )
LLHH ( 4 )
40µS
VISION40µS
40µS
LHLL ( 5 )
LHLH ( 6 )
LHHL ( 7 )
40µS
LHHH ( 8 )
SET
DD RAM
ADDRESS
00 1
READ BUSY
FLAG &
0 1 BF
ADDRESS
WRITE DATA
TO CG RAM 1 0
OR DD RAM
ADD
AC
WRITE DATA
SET DD RAM ADDRESS. DATA MAY
BE WRITTEN OR READ AFTER
MAKING THIS SETTING
READ THE BUSY FLAG(BF) INDICATING
THAT AN INTERNAL OPERATION IS BEING
PERFORMED AND READ THE ADDRESS
COUNTER CONTENTS.
WRITE DATA INTO DD RAM OR
CG RAM.
40µS
1µS
43µS
READ DATA
FROM CG OR 1
DD RAM
1
READ DATA
READ DATA FROM DD RAM OR
CG RAM.
I/D=1: INCREMENT
I/D=0 DECREMENT
S=1: ACCOMPANIES DISPLAY SHIFT
S/C=1: DISPLAY SHIFT S/C=0 CURSOR MOVE
R/L=1 SHIFT TO THE RIGHT
R/L=0: SHIFT TO THE LEFT
DL=1: 8 BITS
DL=0: 4 BITS
N=1: 5X10 DOTS
N=0: 5X7 DOTS
BF=1: BUSY
BF=0: CAN ACCEPT DATA
" ": DON`T CARE FOSC: 27KHZ
DD RAM: DISPLAY DATA RAM
CG RAM: CHARACTER GENERATOR RAM
ACG: CG RAM ADDRESS
ADD: DD RAM ADDRESS
CORRESPONDS TO CURSOR ADDRESS
AC: ADDRESS COUNTER USED FOR BOTH DD
AND CG RAM ADDRESS.
43µS
EXECUTION TIME
CHANGES WITH
CHANGE IN INTERNAL
OSCILLATION
FREQUENCY (FOSC).
EXAMPLE: WHEN
FOSC = 270KHZ
250
40µS X 270 = 37µS
HLLL ( 1 )
HLLH ( 2 )
HLHL ( 3 )
HLHH ( 4 )
HHLL ( 5 )
HHLH ( 6 )
HHHL ( 7 )
HHHH ( 8 )
THIS DATA SHEET IS FOR REFERENCE ONLY. WE RESERVE THE RIGHT TO CHANGES AND IMPROVMENTS WITHOUT PRIOR NOTICE.
INSTRUCTIONS AV CHARACTER MODULES
Tel.: +49 89 89979764
Fax: +49 89 89979765
www.DataSheet.in
Email: info@dst-gmbh.de
Internet: www.dst-gmbh.de
INSTRUCTIONS AND FONT TABLE ENGL./JAPANESE
FOR STANDARD CHARACTER MODULES.
ΤΟΟΣΕ
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AV2020 (ANAG VISION)
20 x 2 Character Display Module

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POWER SUPPLY / INTERFACE TO MCU / INFOMATION ON CHARACTER IC AND LED BACKLIGHT
POWER SUPPLY FOR LCD MODULE
CHARACTER BLOCK DIAGRAM AND LED BACKLIGHT
1.SINGLE SUPPLY VOLTAGE TYPES (INTERNAL N.V.) 2. DUAL SUPPLY VOLTAGE TYPES
CHARACTER BLOCK IC DIAGRAM
VDD
+5V
VDD
+5V
VDD
D
E
AC TIMING CONTROL CIRCUIT
C
VDD-V0
VDD-V0
IR O
RS D
LCM V0
VR VDD
LCM V0
VR VEE
R/W
E
D0-D3
I/O
B
U
F
F
E DD RAM
R
COM
CURSOR DRIVING
AND CIRCUIT
BLINK
LCM
VSS
VSS
D4-D7
E
R
DR
CKT
GND
GND
CG CG
RAM RAM
VDD-V0: LCD DRIVING VOLTAGE
R: 10K - 20K
INTERFACE TO MCU
ANAG VISION1.INTERFACETO Z-80MPU
VDD-V0: LCD DRIVING VOLTAGE
R: 10K - 20K
3. INTERFACE TO 4-BIT MPU (HMCS43C)
VDD
V0
VSS
BUSY
FLAG
P TO S REGISTER
DRIVIN CIRCUIT
DATA REGISTER (DR) IS REGULARLY USED FOR TEMPORARY STORAGE OF DATA READ/WRITE
FROM/INTO DD RAM AND CG RAM.
AD
A1-A7
RS
M
U
X
CQ E
D15
INSTRUCTION REGISTER (IR) IS USED FOR STORING INSTRUCTION CODES AND ADDRESS
INFORMATION OF THE DISPLAY DATA (DD) RAM AND CHARACTER GENERATOR (CG) RAM.
RS
BUSY FLAG (BF) IS "1" WHEN THE LCM IS IN INTERNAL OPERATION AND CANNOT ACCEPT THE
NEXT INSTRUCTION OR DATA.
WR
Z80 RD
DR
LCM
D14
HMCS43C
R/W
LCM
CHARACTER GENERATOR (CG) ROM GENERATES CHARACTER PATTERNS FROM 8-BIT CODE.
THE CG ROM PROVIDES 192 CHARACTER PATTERNS.
IRQ
D13 E CHARACTER GENERATOR (CG) RAM ALLOWES THE USER TO DESIGN AND REWRITE
CHARACTER PATTERNS ACCORDING THE PROGRAM.
D0-D7
R/W
D0-D7
R10-R13
DB4-DB7
ADDRESS COUNTER (AC) IS USED TO GIVE THE ADDRESS INFORMATION OF THE DD RAM AND
CG RAM.
DISPLAY DATA (DD) RAM IS USED TO STORE THE DISPLAY DATA EXPRESSED BY 8-BIT
CHARACTER CODE. THE CAPACITY IS 80 X 8 BITS AND 80 CHARACTERS CAN BE STORED.
2. INTERFACE TO 6800 MCU
4. INTERFACE TO 8051 MCU
CURSOR AND BLINK CONTROL GENERATES THE CURSOR AND BLINK.
VMA
O2
6800 MPU
A15
A14
A13
ADDRESS
DECODER
RS
R/W
D0-D7
E
LCM
RS
R/W
D0-D7
RD
WR
8051 MPU
A15
A14
A13
ALE
ADDRESS
DECODER
AD0-AD7
ADDRESS
LATCH
CONNECTING AV CHARACTER MODULES
Tel.: +49 89 89979764
Fax: +49 89 89979765
www.DataSheet.in
E
LCM
RS
R/W
D0-D7
USAGE OF LED BACKLIGHT
THERE ARE THREE POSSIBILITIES TO USE LED BACKLIGHT IN ANAG VISION CHARACTER MODULES.
DRIVING THE LED THROUGH A CURRENT LIMITING RESISTANCE (RA) WHICH IS ALREADY
INCLUDED IN THE LCM, BY EXTERNAL 5V TO J1 AND J2 BETWEEN PIN 1 AND PIN 2.
PROVIDING 5V BY PIN 15 AND 16 OF THE INTERFACE TO DRIVE THE LED, J15 AND J16 MUST BE
SHORTENED AND RA = 3~7 OHMS IN THIS CASE.
PROVIDING 4.2V BY DIRECT CONNECTION TO THE LED THROUGH A CURRENT LIMITING RESISTANCE.
THIS DATA SHEET IS FOR REFERENCE ONLY.
THE COLOR OF THE DISPLAY MAY VARY SLIGHTLY DEPENDING ON DIFFERENT PRODUCTION
LOTS AND AMBIENT LIGHT. WE RESERVE THE RIGHT TO CHANGES AND IMPROVMENTS WITHOUT
PRIOR NOTICE.
Email: info@dst-gmbh.de
POWER SUPPLY FOR LCD MODULE/INTERFACE TO MCU ΤΟΟΣΕ
Internet: www.dst-gmbh.de CHARACTER BLOCK DIAGRAM AND LED BACKLIGHT
ΙΥΝΙ


AV2020 (ANAG VISION)
20 x 2 Character Display Module

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INITIALIZATION PROCEDURE
POWER ON
WAIT FOR MORE THAN 30MS
AFTER VCC RISES TO 4.5V
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00 0 0 1 1
INITIALIZATION BY SETTING THE SOFTWARE [CHARACTER TYPE LCM].
REFERE TO FIGURES 1 AND 2 FOR PROCEDURES ON 8-BIT AND 4-BIT
INITIALIZATION ACCORDINGLY.
BF CANNOT BE CHECKED BEFORE THIS INSTRUCTION.
FUNCTION SET INTERFACE IS 8 BITS LONG.
POWER ON
WAIT FOR MORE THAN 30MS
AFTER VCC RISES TO 4.5V
RS R/W DB7 DB6 DB5 DB4
00 0 0 1 1
WAIT FOR MORE THAN 4.1µS
WAIT FOR MORE THAN 4.1µS
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00 0 0 1 1
WAIT FOR MORE THAN 100µS
ANAG VISIONRSR/WDB7DB6DB5DB4DB3DB2DB1DB0
BF CANNOT BE CHECKED BEFORE THIS INSTRUCTION.
FUNCTION SET INTERFACE IS 8 BITS LONG.
BF CANNOT BE CHECKED BEFORE THIS INSTRUCTION.
RS R/W DB7 DB6 DB5 DB4
00 0 0 1 1
WAIT FOR MORE THAN 100µS
RS R/W DB7 DB6 DB5 DB4
00 0 0 1 1
FUNCTION SET INTERFACE IS 8 BITS LONG.
00 0 0 1 1
BF CAN BE CHECKED AFTER THE FOLLOWING
INSTRUCTIONS. IF THE BF IS NOT CHECKED,
THE WAITING TIME BETWEEN INSTRUCTIONS IS
LONGER THAN THE INSTRUCTION EXECUTION TIME.
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00 0 0 1 1NF
00 0 0 0 01 0 0 0
00 0 0 0 00 0 0 1
0 0 0 0 0 0 0 1 I/D S
INITIALIZATION ENDS
FUNCTION SET [INTERFACE IS 8 BITS LONG. THE NUMBER
OF DISPLAY LINES AND CHARACTERS IS SPECIFIED.
NEITHER CANNOT BE CHANGED AFTERWARDS].
DISPLAY OFF
DISPLAY CLEAR
ENTRY MODE SET
[COND.: FOSC=270KHZ]
RS R/W DB7 DB6 DB5 DB4
00 0 0 1 0
00 0 0 1 0
00 N F
00 0 0 0 0
00 1 0 0 0
00 0 0 0 0
00 0 0 0 1
00 0 0 0 0
0 0 0 1 I/D S
FIGURE1: 8-BIT INTERFACE
INITIALIZATION ENDS
FIGURE2: 4-BIT INTERFACE
THIS DATA SHEET IS FOR REFERENCE ONLY. WE RESERVE THE RIGHT TO CHANGES AND IMPROVMENTS WITHOUT PRIOR NOTICE.
INITIALIZING AV CHARACTER MODULES
www.DataSheet.in
Tel.: +49 89 89979764
Fax: +49 89 89979765
Email: info@dst-gmbh.de
Internet: www.dst-gmbh.de
INITIALIZATION PROCEDURE ON 8-BIT AND 4-BIT
INTERFACES OF STANDARD CHARACTER MODULES.
ΤΟΟΣΕ
ΙΥΝΙ




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