DISPLAY Elektronik GmbH
LCD MODULE
DEM 20486 SYH-LY
Product Specification Version: 1
04/Dec/2007
GENERAL SPECIFICATION
MODULE NO. :
DEM 20486 SYH-LY
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION DATE
0 ORIGINAL VERSION 11.01.2001
1
CHANGE IC
04.12.2007
PREPARED BY: LSY DATE: 04.12.2007
APPROVED BY: MH DATE: 04.12.2007
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 ----------------------------------------------------------------------- 4
7. BACKLIGHT ELECTRICAL/OPTICAL SPECIFICATIONS ------------------------------------------ 6
8. DISPLAY DATA RAM (DDRAM)------------------------------------------------------------------------------ 6
9. MAXIMUM ABSOLUTE POWER LIMIT ------------------------------------------------------------------ 7
10. ELECTRICAL CHARACTERISTICS ---------------------------------------------------------------------- 7
11. CONTROL AND DISPLAY COMMAND ------------------------------------------------------------------- 9
12. LCM INITIALIZING BY INSTRUCTION---------------------------------------------------------------- 10
13. CHARACTER GENERATOR ROM (ST7066) ----------------------------------------------------------- 12
14. LCD MODULES HANDLING PRECAUTIONS--------------------------------------------------------- 13
15. OTHERS ---------------------------------------------------------------------------------------------------------- 13
Version: 1 PAGE: 1
DEM 20486 SYH-LY Product Specification
1. FUNCTIONS & FEATURES
MODULE NAME LCD TYPE
DEM 20486 SYH-LY STN Yellow Green Transflective Positive Mode
z Viewing Direction : 6 o’clock
z Driving Scheme
z Power Supply Voltage
z Backlight Color : LED, Lightbox, Yellow Green
z VLCD Adjustable For Best Contrast : 4.5 Volt (typ.)
z Display contents
z Internal Memory
z CGROM
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.)
: 20 x4 Characters
: CGROM (10,080 bits )
: CGRAM (64 x 8 bits )
: DDRAM (80 x 8 bits for Digits)
: CGROM of the ST7066
2. MECHANICAL SPECIFICATIONS
z Module Size : 98.00 x 60.00 x 14.5 mm
z Character Font
z Dot Size
z Dot Pitch : 0.70 x 0.80 mm
z Dot Gap : 0.05mm
: 5 x 8 dots
: 0.65 x 0.75 mm
Version: 1 PAGE: 2
DEM 20486 SYH-LY Product Specification
3. EXTERNAL DIMENSIONS ( unit: mm)
4. BLOCK DIAGRAM
DB0~DB7
E
R/W
RS
0
V
DD
V
V
SS
A
K
LCD
Controller
LSI
ST7066
BACKLIGHT
COM1~COM16
SEG1~SEG40
Control signals
LCD PANEL
4line*20characters
SEG41~SEG120
SEGMENT
DRIVER
ST7063
SEGMENT
SEG121~SEG200
DRIVER
ST7063
Version: 1 PAGE: 3
DEM 20486 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)
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
Function
its; and twice , thru DB4~DB7 in the
6. PCB DRAWING AND APPLICATION
6.1 PCB Drawing And Description
Note: on application module, R1~R5=1kΩ, R6=91kΩ
Version: 1 PAGE: 4
DEM 20486 SYH-LY Product Specification
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= 0 Ohm, J2=J4= open
6-1-2. The metal-bezel is set on ground when the J1 = 0 Ohm.
Note: on application module, J1= 0 Ohm
6-1-3.The LED resistor should can be bridged when the J6 is open.
Note: on application module, J6=open
LED Polarity
15 Pin 16 Pin
6-1-4.The R7 and the R8 are the LED resistor.
Note: on application module, R7= R8=10Ω.
6.2 Example application
6-2-1. The LED resistor should be bridged as following.
6-2-2. The 15 pin is the anode and the 16 pin is the cathode as following.
J4
J5
6-2-3.The 15 pin is the cathode and the 16 pin is the anode as following.
J4
J5
6-2-4. The metal-bezel is on ground as following.
R8
R7
J6
J3
J2
J3
J2
J1
Version: 1 PAGE: 5
DEM 20486 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)
）
）
）
8. DISPLAY DATA RAM (DDRAM)
Version: 1 PAGE: 6
DEM 20486 SYH-LY Product Specification
9. MAXIMUM ABSOLUTE POWER LIMIT
Item Symbol Standard value Unit
Power supply voltage VDD -0.3~+7.0 V
LCD Driver voltage V
Input voltage VIN -0.3~VDD+0.3 V
V
LCD
-10.0~VDD+0.3 V
DD
Operating temperature Topr -20~+70
Storage temperature Tstg -30~+80
10. ELECTRICAL CHARACTERISTICS
10-1-1 DC Characteristics (VDD=5.0V, Ta=-20~+70°C)
Item Symbol
Operating Voltage V
Supply Current I
LCD Driving Voltage
V
DD
DD
LCD
10-2 AC Characteristics (VDD=5.0V , Ta=-20~+70°C)
10-2-1 Write mode
Characteristic Symbol Min Type Max Unit Test PIN
Enable Cycle Time t
Enable Pulse Time T
Enable Rise/Fall Time
Address Set-up Time T
Address Hold Time T
Data Set-up Time T
Data Hold Time T
T
R
DSW
Standard Value
MIN TYP MAX
4.5 5 5.5 ------- V
---- 0.2 0.5
V
DD
3.0 --- 10.0
C
PW
，
AS
AH
T
F
1200 --- --- ns E
460 --- --- ns E
--- --- 25 ns E
0 --- --- ns R/W,RS,E
10 --- --- ns R/W,RS,E
80 --- --- ns DB0~DB7
H
10 --- --- ns DB0~DB7
Test
Condition
=5V,fosc=270kHz
VDD-V5
℃
℃
Unit
mA
V
Version: 1 PAGE: 7
DEM 20486 SYH-LY Product Specification
10-2-2 Read mode (reading data from module Series to MPU )
Characteristic Symbol Min Type Max Unit Te s t P I N
Enable Cycle Time t
Enable Pulse Time T
Enable Rise/Fall Time
T
Address Set-up Time T
Address Hold Time T
Data Set-up Time T
Data Hold Time T
PW
，
R
AS
AH
DDR
C
T
H
1200 --- --- ns E
480 --- --- ns E
F
--- --- 25 ns E
0 --- --- ns R/W,RS,E
10 --- --- ns R/W,RS,E
--- --- 320 ns DB0~DB7
10 --- --- ns DB0~DB7
Version: 1 PAGE: 8
DEM 20486 SYH-LY Product Specification
11. CONTROL AND DISPLAY COMMAND
Command RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
clear
Display
Return home L L L L L L L L H --- 1.52ms
Entry mode
Set
Display
on/off
control
Cursor
or
Display Shift
L L L L L L L L L H 1.52ms
L L L L L L L H I/D SH 37us
L L L L L L H D C B 37us
L L L L L H S/C R/L --- --- 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
function
Set
Set CGRAM
address
Set DDRAM
address
Read busy
flag&
address
Write data
to RAM
Read data
from RAM
L L L L H DL N F --- --- 37us
L L L H AC5 AC4 AC3 AC2 AC1 AC0 37us
L L H AC6 AC5 AC4 AC3 AC2 AC1 AC0 37us
L H BF AC6 AC5 AC4 AC3 AC2 AC1 AC0 0us
H L D7 D6 D5 D4 D3 D2 D1 D0 37us
H H D7 D6 D5 D4 D3 D2 D1 D0 37us
N:number of line is 2/1
F:font size is 5x11/5x8
37 us
Set CGRAM address in
address counter
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)
37 us
Read data from internal
RAM
(DDRAM/CGRAM)
37 us
Note:
Be sure the ST7066U is not in the busy state(BF=0)before sending an instruction from the MPU to the
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 PAGE: 9
DEM 20486 SYH-LY Product Specification
12. LCM INITIALIZING BY INSTRUCTION
12-1 8-bit interface mode
Power on
Wait time > 40ms Condition : fosc=270khz
After VDD> 4.5v
0 1-line mode
Function set
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 1 N F X X 0 5 x 8 font
Wait for more than 37us
0 display off
Display on/off control
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 1 D C B 0 cursor off
Wait for more than 37us 0 blink off
Display clear
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 0 0 0 1
Wait for more than 1.52ms
Entry mode set
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 0 1 I/D SH
0 entire shift off
Initialization end
0 decrement mode
N
F
D
1 2-line mode
1 5 x 11 font
1 display on
C
1 cursor on
B
I/D
SH
1 blink on
1 increment mode
1 entire shift on
Version: 1 PAGE: 10
DEM 20486 SYH-LY Product Specification
12-2 4-bit interface mode
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 1-line mode
0 0 0 0 1 0 X X X X
0 0 0 0 1 0 X X X X 0 5 x 8 font
0 0 N F X X X X X X
Wait for more than 37us
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 X X X X C 0 cursor off
0 0 1 D C B X X X X 1 cursor on
Wait for more than 37us
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 X X X X
0 0 0 0 0 1 X X X X
Wait for more than 1.52ms
Entry mode set 0 decrement mode
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 X X X X 0 entire shift off
0 0 0 1 I/D SH X X X X
Initialization end
Power on
Wait time > 40ms
After VDD> 4.5v
Function set
Display on/off control 0 display off
0 blink off
Display clear
Condition: fosc=270khz
N
F
D
1 2-line mode
1 5 x 11 font
1 Display on
B
I/D
SH
1 blink on
1 increment mode
1 entire shift on
Version: 1 PAGE: 11
DEM 20486 SYH-LY Product Specification
13. CHARACTER GENERATOR ROM (ST7066-0A)
Upper(4bit)
Lowerr(4bit)
LLLL
LLLL
CG RAM
(1)
LLLH LLHL LLHH LHLL LH LH LHHL LHHH HLLL HLLH HLHL HLHH HH LL HHLH HHHL HHHH
LLLH
LLHL
LLHH
LHLL
LHLH
LHHL
LHHH
HLLL
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(1)
HLLH
HLHL
HLHH
HHLL
HHLH
HHHL
HHHH
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Version: 1 PAGE: 12
DEM 20486 SYH-LY Product Specification
14. 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.
15. 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 PAGE: 13
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