DISPLAY Elektronik GmbH
LCD MODULE
DEM 20485 SYH-LY-CYR22
Product Specification Version : 1
21.Aug. 2008
GENERAL SPECIFICATION
MODULE NO. :
DEM 20485 SYH-LY-CYR22
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION DATE
0 ORIGINAL VERSION 31.03.2004
1 CHANGE IC 14.08.2008
PREPARED BY: CXG DATE: 14.08.2008
APPROVED BY: MH DATE: 21.08.2008
DEM 20485 SYH-LY-CYR22 Product Specification
CONTENTS
1. FUNCTIONS & FEATURES----------------------------------------------------------------------------------2
2. MECHANICAL SPECIFICATIONS -------------------------------------------------------------------------2
3. BLOCK DIAGRAM--------------------------------------------------------------------------------------------3
4. EXTERNAL DIMENSIONS----------------------------------------------------------------------------------3
5. PIN ASSIGNMENT --------------------------------------------------------------------------------------------4
6. PCB DRAWING AND DESCRIPTION ---------------------------------------------------------------------4
7. BACKLIGHT VOLTAGE & CURRENT--------------------------------------------------------------------5
8. DISPLAY DATA RAM-----------------------------------------------------------------------------------------6
9. MAXIMUM ABSOLUTE POWER RATINGS-------------------------------------------------------------6
10. ELECTRICAL CHARACTERISTICS --------------------------------------------------------------------- 7
11. CONTROL AND DISPLAY COMMAND----------------------------------------------------------------- 9
12. STANDARD CHARACTER PATTERN -------------------------------------------------------------------10
13. LCD MODULES HANDLING PRECAUTIONS --------------------------------------------------------11
14. OTHERS--------------------------------------------------------------------------------------------------------11
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DEM 20485 SYH-LY-CYR22 Product Specification
1. FUNCTIONS & FEATURES
MODULE NAME LCD TYPE
DEM 20485 SYH-LY-CYR22 STN Yellow Green Transflective Positive Mode
z Viewing Direction : 6 O’clock
z Driving Scheme : 1/16 Duty Cycle, 1/5 Bias
z Power Supply Voltage : 5.0V (typ.)
z Backlight Color : Yellow Green
z VLCD : 4.5V (typ.)
z Display contents : 20 x 4 Characters
z Internal Memory : CGROM (10080 bits)
: CGRAM (64 x 8 bits)
: DDRAM (80 x 8 bits for Digits)
z CGROM : CGROM of the ST7066U-0T
z Operating Temperature : -20°C to +70°C
z Storage Temperature : -30°C to +80°C
z Interface : Easy Interface with a 4-bit or 8-bit MPU
2. MECHANICAL SPECIFICATIONS
z Module Size : 98.00 x 60.00 x 14.50 mm (max.)
z Character Pitch : 3.55 x 5.35 mm
z Character Size : 2.95 x 4.75 mm
z Character Font : 5 x 8 dots
z Dot Size : 0.55 x 0.55 mm
z Dot Pitch : 0.60 x 0.60 mm
z Dot Gap
: 0.05 mm
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2
DEM 20485 SYH-LY-CYR22 Product Specification
3. BLOCK DIAGRAM
DB0~DB7
E
R/W
LCD
Controller
RS
LSI
ST7066U-0T
V0
VDD
VSS
A
K
4. EXTERNAL DIMENSIONS
COM1~COM16
SEG1~SEG40
Control signals
BACKLIGHT
LCD PANEL
4Line*20characters
SEG41
~SEG120
SEGMENT
DRIVER
ST7063
SEG121
~SEG200
SEGMENT
DRIVER
ST7063
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3
DEM 20485 SYH-LY-CYR22 Product Specification
5. PIN ASSIGNMENT
Pin No. Symbol Function
1 VSS Ground terminal of module.
2 VDD Power terminal of module+5.0V.
3 V0 Power Supply for liquid crystal drive.
Register select
4 RS
5 R/W
6 E Enable
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
15 LED – (K) Please also refer to 6.1 PCB drawing and description.
16 LED + (A) Please also refer to 6.1 PCB drawing and description.
RS = 0…Instruction register
RS = 1…Data register
Read /Write
R/W = 1…Read
R/W = 0…Write
Bi-directional data bus, data transfer is performed once, thru DB0 to
DB7, in the case of interface data. Length is 8-bits; and twice, thru
DB4 to DB7 in the case of interface data length is 4-bits. Upper four
bits first then lower four bits.
6. PCB DRAWING AND DESCRIPTION
Note: The part no. DEM20485CYR22 is printed on the PCB.
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DEM 20485 SYH-LY-CYR22 Product Specification
DESCRIPTION:
6-1-1.The polarity of the pin 15 and the pin 16 :
LED Polarity
15 Pin 16 Pin
symbol
symbol
state
J3,J5 J2,J4
J2,J4 Each solder-bridge Each open Each closed Anode Cathode
J3,J5 Each solder-bridge Each closed Each open Cath od e Anode
Note: In application module, J3=J5=closed, J2=J4=open
6-1-2.The metal-bezel is set on ground when the J1 is closed.
Note: In application module, J1=closed
6-1-3.The LED resistor can be bridged when the J6 is closed
Note: In application module, J6=open
6-1-4.The R7 and the R8 are the LED resistor.
Note: R7=R8=10ohm
7. BACKLIGHT & SWITCH (Ta=-20~+70°C)
ITEM
For war d Vol t age
For war d Cur r ent
Po we r Di s s i p a t i o n
Rever se Vol t age
Rever se Cur r ent
Lumi nous I nt ensi t y
Lumi nous Uni f or mity
Emi ssi on Wavel engt h
34. 0
31. 0V. AMIN
SYMBOL
Vf
If
Pd - - 1 . 1 5 W
Vr
Ir
Iv
Lv
¦¤
P
¦Ë
MIN.
--
--
--
100
75
569
8 7 . 0 V. AMIN
91. 0
4. 1
280
--
--
150
--
572 575
MAX.
4. 5
560
--
10. 0--
0. 20
--
1. 25
UNI TTYP.
V
mA
V
mA
cd/ m
%
nm
A
K
6. 0± 0. 2
2. 50± 0. 2
2
10. 0
CONDI T I ONS
If=280mA
If=280mA
If=280mA
If=280mA
If=10mA Ta = 2 5 ° C
Ea c h c h i p
5. 0
CI RCUI T DI AGRAM
LED 28X2=56 PCS
A
K
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0. 60± 0. 10
6. 00± 0. 50
5
DEM 20485 SYH-LY-CYR22 Product Specification
6
8. DISPLAY DATA RAM (DDRAM)
4
FIRST
LINE
SECOND
LINE
00
40
03
43
5
04
44
1
2
3
01
02
41
42
05
45
7
6
06
46
8
07
47
9
08
48
10
09
49
11
0A
4A
12
0B
4B
13
0C
4C
14
15
0D
0E4E0F 10
4D
16
4F
17
50
18 19
11
12
51
52 53
20
13
THIRDD
LINE
FOURTH
LINE
14 15
5554
16
56
17
57
18
58
19
59
1A 1B
5B5A
1C
5C
1D 1E 1F
20 21 22 23 24 25 26 27
5F5E5D
6766656463626160
9. MAXIMUM ABSOLUTE POWER RATINGS ( Ta=25°C)
Item Symbol Standard value
Power supply voltage (1) VDD -0.3~+7.0
Power supply voltage (2) V0 V
Input voltage
VIN -0.3~VDD+0.3
-15.0~VDD+0.3
DD
Operating temperature Topr -20~+70
Storage temperature
Tstg
-30~+80
*Voltage greater than above may damage to the Circuit.
VDD＞V1＞V2＞V3＞V4＞V5
Unit
V
V
V
°C
°C
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DEM 20485 SYH-LY-CYR22 Product Specification
7
10. ELECTRICAL CHARACTERISTICS
10-1 DC Characteristics(VDD=4.5V~5.5V,Ta=-20~+70°C)
Item Symbol
Operating Voltage V
Supply Current I
DD
DD
Standard Value
MIN TYP MAX
4.5 5 5.5 ------- V
---- 0.35 0.6 VDD=5V,fosc=270kHz mA
Test
Condition
LCD Driving Voltage VLCD 3.0 4.5 13.0 VDD-V5 (1/5,1/4 Bias) V
10-2 AC Characteristics (VDD=4.5V~5.5V, Ta=-20~+70°C)
10-2-1. Write mode (writing data from MPU to module)
Characteristic Symbol Min Typ Max Unit Test PIN
E Cycle Time t
E Rise Time t
E Fall Time t
E Pulse width (High, Low) t
R/W and RS Set-up Time t
C
R
F
W
SU1
1200 --- --- ns E
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W, RS
Unit
R/W and RS Hold Time t
Data Set-up Time t
Data Hold Time t
VIH1
RS
VIL1
R/W
E
DB0~DB 7
H1
SU2
H2
tAS
tr
10 --- --- ns R/W, RS
40 --- --- ns DB0~DB7
10 --- --- ns DB0~DB7
tAH
VIL1
tPW
tDSW
Valid Data
tAH
tr
tH
tC
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DEM 20485 SYH-LY-CYR22 Product Specification
10-2-2.Read mode (Reading data from module to MPU)
Characteristic Symbol Min Typ Max Unit Test PIN
E Cycle Time t
E Rise Time t
E Fall Time t
E Pulse width (High, Low) t
R/W and RS Set-up Time t
R/W and RS Hold Time t
Data output Delay Time t
Data Hold Time t
VIH1
RS
IL1
V
tAS
C
R
F
W
SU
H
D
DH
1200 --- --- ns E
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W, RS
10 --- --- ns R/W, RS
--- --- 100 ns DB0~DB7
5 --- --- ns DB0~DB7
tAH
R/W
E
DB0~DB7
tPW
tr
tDDR
Val id Data
tC
tAH
tr
tH
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DEM 20485 SYH-LY-CYR22 Product Specification
11. CONTROL AND DISPLAY COMMAND
Execution
Command RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
time
(fosc=270KHz)
Remark
Clear
Display
Return
home
Entry mode
Set
Display
on/off
control
Cursor
or
Display
Shift
function
Set
Set
CGRAM
address
0 0 0 0 0 0 0 0 0 1 1.52ms
0 0 0 0 0 0 0 0 1 x 1.52ms
0 0 0 0 0 0 0 1 I/D S 37us
0 0 0 0 0 0 1 D C B 37us
0 0 0 0 0 1 S/C R/L x x 37us
0 0 0 0 1 DL N F x x 37us
0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0 37us
Write”20H” to DDRAM. And set
DDRAM address to “00H” from AC
Set DDRAM address to “00H” from
AC and return cursor to its original
position if shifted. The contents of
DDRAM are not changed.
Sets cursor move direction and specifies
display shift. These operations are
performed during data write and read.
D=1: entire display on
C=1: cursor on
B=1: cursor position on
Set cursor moving and display shift
control bit, and the direction, without
changing DDRAM data.
DL: interface data is 8/4 bits
N: number of line is 2/1
F: font size is 5x11/5x8
Set CGRAM address in address
counter
Set
DDRAM
address
Read busy
flag&
address
Write data
to RAM
Read data
from RAM
Note:
Be sure the ST7066U is not in the busy state (BF=00 before sending an instruction from the MPU to the ST7066U. If
0 0 1 AC6 AC5 AC4 AC3 AC2 AC1 AC0 37us
0 1 BF AC6 AC5 AC4 AC3 AC2 AC1 AC0 0us
1 0 D7 D6 D5 D4 D3 D2 D1 D0 37us
1 1 D7 D6 D5 D4 D3 D2 D1 D0 37us
Set DDRAM address in address
counter
Whether during internal operation or
not can be known by reading BF. The
contents of address counter can also be
read.
Write data into internal RAM
(DDRAM/CGRAM)
Read data from internal RAM
(DDRAM / CGRAM)
an instruction is sent without checking the busy flag, the time between the first instruction and next instruc tion will
take much longer than the instruction time itself. Refer to instruction table for the list of each instruction execution
time.
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DEM 20485 SYH-LY-CYR22 Product Specification
12. STANDARD CHARACTER PATTERN (ST7066U-0T)
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DEM 20485 SYH-LY-CYR22 Product Specification
13. LCD MODULES HANDLING PRECAUTIONS
Please remove the protection foil of polarizer before using.
The display panel is made of glass. Do not subject it to a mechanical shock by dropping it from a
high place, etc.
If the display panel is damaged and the liquid crystal substance inside it leaks out, do not get any in
your mouth. If the substance comes into contact with your skin or clothes promptly wash it off using
soap and water.
Do not apply excessive force to the display surface or the adjoining areas since this may cause the
color tone to vary.
The polarizer covering the display surface of the LCD module is soft and easily scratched. Handle
this polarizer carefully.
To prevent destruction of the elements by static electricity, be careful to maintain an optimum work
environment.
-Be sure to ground the body when handling the LCD module.
-Tools required for assembly, such as soldering irons, must be properly grounded.
-To reduce the amount of static electricity generated, do not conduct assembly and other work under
dry conditions.
-The LCD module is coated with a film to protect the display surface. Exercise care when peeling off
this protective film since static electricity may be generated.
Storage precautions
When storing the LCD modules, avoid exposure to direct sunlight or to the light of fluorescent lamps.
Keep the modules in bags designed to prevent static electricity charging under low temperature /
normal humidity conditions (avoid high temperature / high humidity and low temperatures below
0°C).Whenever possible, the LCD modules should be stored in the same conditions in which they
were shipped from our company.
.14. OTHERS
Liquid crystals solidify at low temperature (below the storage temperature range) leading to defective
orientation of liquid crystal or the generation of air bubbles (black or white). Air bubbles may also be
generated if the module is subjected to a strong shock at a low temperature.
If the LCD modules have been operating for a long time showing the same display, patterns may
remain on the screen as ghost images and a slight contrast irregularity may also appear. Abnormal
operating status can be resumed to be normal condition by suspending use for some time. It should be
noted that this phenomena does not adversely affect performance reliability.
To minimize the performance degradation of the LCD modules resulting from caused by static
electricity, etc. exercise care to avoid holding the following sections when handling the modules:
- Exposed area of the printed circuit board
- Terminal electrode sections
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