DISPLAY Elektronik GmbH
LCD MODULE
DEM 20485 SYH-LY
Product Specification Version:1.1.0
14/Nov/2007
GENERAL SPECIFICATION
MODULE NO. :
DEM 20485 SYH-LY
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION
0 ORIGINAL VERSION 29.10.2001
1.1.0 CHANGE IC 14.11.2007
DATE
PREPARED BY: OYQ DATE: 14.11.2007
APPROVED BY: MH DATE: 22.11.2008
DEM 20485 SYH-LY Product Specification
CONTENTS
1. FUNCTIONS & FEATURES ----------------------------------------------------------------- 2
2. MECHANICAL SPECIFICATIONS -------------------------------------------------------- 2
3. EXTERNAL DIMENSIONS------------------------------------------------------------------ 3
4. BLOCK DIAGRAM -------------------------------------------------------------------------- 3
5. PIN ASSIGNMENT --------------------------------------------------------------------------- 4
6. PCB DRAWING AND APPLICATION ----------------------------------------------------5
7. BACKLIGHT ELECTRICAL/OPTICAL SPECIFICATIONS-------------------------- 6
8. DISPLAY DATA RAM (DDRAM)---------------------------------------------------------- 7
9. MAXIMUM ABSOLUTE POWER LIMIT ------------------------------------------------ 7
10. CONTROL AND DISPLAY COMMAND------------------------------------------------- 8
11. STANDARD CHARACTER PATTERN（ST7066U-0A） ----------------------------- 9
12. ELECTRICAL CHARACTERISTICS ----------------------------------------------------- 10
13. LCD MODULES HANDLING PERCAUTIONS ---------------------------------------- 12
14. OTHERS --------------------------------------------------------------------------------------- 12
Version: 1.1.0 PAGE: 1
DEM 20485 SYH-LY Product Specification
1.FUNCTIONS & FEATURES
MODULE NAME LCD TYPE
DEM 20485 SYH-LY STN Yellow Green Transflective Positive Mode
z Viewing Direction : 6 o'clock
z Driving Scheme
z Power Supply Voltage
z V
(VDD-V0) :4.5 Volt (typ.)
LCD
z Backlight Color
z Display contents
z Internal Memory
z CGROM
: CGROM of the ST7066-0A
z Interface : Easy Interface with a 4-bit or 8-bit MPU
z Operating Temperature : -20°C to +70°C
z Storage Temperature : -30°C to +80°C
: 1/16 Duty Cycle, 1/5 Bias
: 5 Volt (typ.)
: LED, Lightbox, Yellow-Green
: 20 x4 Characters (5 x 8 dots, Format: 208 Kinds)
: CGROM (10,080 bits )
: CGRAM (64 x 8 bits )
: DDRAM (80 x 8 bits for Digits)
2. MECHANICAL SPECIFICATIONS
z Module Size : 98.00 x 60.00 x 14.50 mm
z Character Font
z Character Size
z Character Pitch
z Dot Size
: 5 x 8 dots
: 4.75 x 2.95 mm
: 5.35 x 3.55 mm
: 0.55 x 0.55 mm
z Dot Pitch : 0.60 x 0.60 mm
Dot Gap : 0.05mm
z
Version: 1.1.0 PAGE: 2
DEM 20485 SYH-LY Product Specification
3. EXTERNAL DIMENSIONS ( unit: mm)
4. BLOCK DIAGRAM
DB0~DB7
E
R/W
RS
V
0
V
DD
V
SS
LCD
Controller
LSI
ST7066
COM1~COM16
SEG1~SEG40
Control signals
LCD PANEL
4line*20characters
SEG41~SEG120
SEGMENT
DRIVER
ST7063
SEGMENT
SEG121~SEG200
DRIVER
ST7063
A
K
Version: 1.1.0 PAGE: 3
BACKLIGHT
DEM 20485 SYH-LY Product Specification
b
5. PIN ASSIGNMENT
Pin No. Symbol
1 VSS Ground terminal of module
2 VDD Supply terminal of module +5 V
3 V0 Power Supply for Liquid crystal Drive
4 RS Register Select, RS = 0… Instruction Register, RS = 1… Data Register
5 R/W Read / Write, R/W = 1… Read, R/W = 0… Write
6 E Enable
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
15 LED- (K)
16 LED+ (A)
Function
Bi-directional Data Bus, Data Transfer is performed once , thru DB0~DB7 , in
the case of interface data . Length is 8case of interface data length is 4-bits. Upper four bits first then lower four
bits .
Please also refer to 6.1 PCB drawing and description.
its; and twice , thru DB4~DB7 in the
Version: 1.1.0 PAGE: 4
DEM 20485 SYH-LY Product Specification
6. PCB DRAWING AND APPLICATION
6.1 PCB Drawing And Description
Note: on application module, R1~R5=820Ω, R6=91KΩ
Description :
6-1-1.The polarity of the pin 15 and the pin 16
J3,J5 J2, J4
Each open Each closed Anode Cathode
Each closed Each open Cathode Anode
Note: on application module, J3=J5= closed, J2=J4=open
LED Polarity
15 Pin 16 Pin
6-1-2. The metal-bezel is set on ground when the J1 is closed .
Note: on application module, J1=closed
6-1-3.The LED resistor should can be bridged when the J6 is open.
Note: on application module, J6=open
6-1-4.The R7 and the R8 are the LED resistor.
Note: on application module, R7= R8=10Ω.
Version: 1.1.0 PAGE: 5
DEM 20485 SYH-LY Product Specification
7. BACKLIGHT ELECTRICAL/OPTICAL SPECIFICATIONS
7.1 Absolute Maximum Ratings (Ta=25°C)
Item Symbol Conditions Rating Unit
Absolute maximum forward current Ifm 480 mA
Peak forward current Ifp 1 msec plus 10% guty cycle 1152 mA
Reverse Voltage Vr 5 V
Power dissipation Pd 2400 mW
7.2 Electrical-optical characteristics (Ta=25°C)
Item Symbol Min. Typ . Max. Unit Condition
Forward voltage Vf 3.8 4.0 4.3 V If=240mA
Reverse current Ir 100 uA Vr=4.0V
Dominant wave length
λ D
569 572 575 nm If=240mA
Spectral line half width
Δλ
25 nm If=240mA
Luminance Lv (140) cd/m2 If=240mA
7.3 Backlight Drawing ( unit: mm)
）
）
）
Version: 1.1.0 PAGE: 6
DEM 20485 SYH-LY Product Specification
8. DISPLAY DATA RAM (DDRAM)
9. MAXIMUM ABSOLUTE POWER LIMIT
Item Symbol Standard value Unit
Power supply voltage (1) VDD -0.3~+7.0 V
Power supply voltage (2) V
V
LCD
-15.0~VDD+0.3 V
DD
Input voltage VIN -0.3~VDD+0.3 V
Volt. For BL VLED1 4~4.5 V
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
Version: 1.1.0 PAGE: 7
DEM 20485 SYH-LY Product Specification
10. CONTROL AND DISPLAY COMMAND
Command RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Clear
Display
Return home 0 0 0 0 0 0 0 0 1 x 1.52ms
Entry mode
Set
Display
on/off
control
Cursor
or
Display Shift
function
Set
0 0 0 0 0 0 0 0 0 1 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
Execution time
(fosc=270KHz)
Remark
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
Set DDRAM
address
Read busy
flag&
address
Write data
to RAM
Read data
from RAM
Note:
Be sure the ST7066U is not is not in the busy state (BF=00 before sending an instruction from the MPU to the
0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0 37us Set CGRAM address in address counter
0 0 1 AC6 AC5 AC4 AC3 AC2 AC1 AC0 37us Set DDRAM address in address counter
Whether during internal operation or not
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
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)
ST7066U. If an instruction is sent without checking the busy flag, the time between the first instruction and next
instruction will take much longer than the instruction time itself. Refer to instruction table for the list of each
instruction execution time.
Version: 1.1.0 PAGE: 8
DEM 20485 SYH-LY Product Specification
11.STANDARD CHARACTER PATTERN (ST7066U-0A)
Lo w e rr(4 b it)
0000
0001
0010
0011
0100
0101
0110
U p p e r(4b it)
0000
CG RAM
( 1 )
( 2 )
( 3 )
( 4 )
( 5 )
( 6 )
( 7 )
0001 0010 0011 0100 0101 0110 0111 1000 1001 10010 1011 1100 1101 1110 1111
0111
1000
1001
1010
1011
1100
1101
1110
( 8 )
( 1 )
( 2 )
( 3 )
( 4 )
( 5 )
( 6 )
( 7 )
1111
( 8 )
Version: 1.1.0 PAGE: 9
DEM 20485 SYH-LY Product Specification
12. ELECTRICAL CHARACTERISTICS
12-1-1 DC Characteristics (VDD=4.5V~5.5V, Ta=-30~+80°C)
Item Symbol
Operating Voltage V
Supply Current I
LCD Driving Voltage
V
DD
DD
LCD
Standard Value
MIN TYP MAX
4.5 5 5.5 ------- V
---- 0.35 0.6
3.0 4.5 13.0
VDD=5V,fosc=270kHz
VDD-V0(5, 1/4 Bias)
Test
Condition
12-2 AC Characteristics (VDD=4.5V~5.5V , Ta=-30~+80°C)
12-2-1 Write mode (writing data from MPU to module)
Characteristic Symbol Min Type Max Unit Tes t P IN
E Cycle Time t
E Rise Time
E Fall Time t
E Pulse width
Address Setup Time t
Address Hold Time
C
t
R
F
t
W
SU1
t
H1
1200 --- --- ns E
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W,RS,E
10 --- --- ns R/W,RS,E
Unit
mA
V
Data Set-up Time t
Data Hold Time t
RS
R/W
E
DB0~DB 7
VIH1
VIL1
SU2
H2
tAS
tr
40 --- --- ns DB0~DB7
10 --- --- ns DB0~DB7
tAH
VIL1
tPW
tDSW
Valid Data
tAH
tr
tH
tC
Version: 1.1.0 PAGE: 10
DEM 20485 SYH-LY Product Specification
12-2-2 Read mode (reading data from module to MPU )
Characteristic Symbol Min Ty pe Max Unit Tes t PI N
E Cycle Time t
C
1200 --- --- ns E
E Rise Time
E Fall Time t
E Pulse width
Address Setup Time t
Address Hold Time t
Data Setup Time
Data Hold Time
VIH1
RS
V
IL1
tAS
R/W
t
tp
t
DDR
t
R
F
AS
AH
H
W
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W,RS,E
10 --- --- ns R/W,RS,E
--- ---
100
ns DB0~DB7
10 --- --- ns DB0~DB7
tAH
tPW
tAH
tr
E
DB0~DB7
tr
tDDR
Val id Data
tC
tH
Version: 1.1.0 PAGE: 11
DEM 20485 SYH-LY 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 come 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 polarize
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
Version: 1.1.0 PAGE: 12
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