DISPLAY Elektronik GmbH
LCD MODULE
DEM 20121 SYH-LY
Product Specification Version : 4.1.1
13/June/2008
GENERAL SPECIFICATION
MODULE NO. :
DEM 20121 SYH-LY
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION
0 ORIGINAL VERSION 17.05.2003
1 CHANGE PIN 15&16 29.05.2003
2 CHANGE PCB 05.06.2003
3 CHANGE DRIVING SCHEME 10.06.2003
4 CHANGE BACKLIGHT CURRENT 08.09.2006
4.1.1 CHANGE LCD-DRIVER 13.06.2008
DATE
PREPARED BY: XYP DATE: 13.06.2008
APPROVED BY: MH DATE: 13.06.2008
DEM 20121 SYH-LY Product Specification
CONTENTS
1.FUNCTIONS & FEATURES ..........................................................................................................................2
2. MECHANICAL SPECIFICATIONS.............................................................................................................2
3. EXTERNAL DIMENSIONS...........................................................................................................................3
4. BLOCK DIAGRAM........................................................................................................................................4
5. PIN ASSIGNMENT.........................................................................................................................................4
6. PCB DRAWING AND DESCRIPTION ........................................................................................................5
7. BACKLIGHT ELECTRICAL/OPTION CHARATERISTICS..................................................................6
8. MAXIMUM ABSOLUTE POWER RATINGS ( TA=25°C)........................................................................6
9. ELECTRICAL CHARACTERISTICS .........................................................................................................7
10. CONTROL AND DISPLAY COMMAND ...................................................................................................9
11. STANDARD CHARACTER PATTERN (ST7066-0A).............................................................................10
12. LCM INITIALIZATION............................................................................................................................11
13. LCD MODULES HANDLING PRECAUTIONS.....................................................................................13
14. OTHERS.......................................................................................................................................................13
Version:4.1.1 PAGE:1
DEM 20121 SYH-LY Product Specification
1. FUNCTIONS & FEATURES
MODULE NAME LCD TYPE
DEM 20121 SYH-LY STN Green Transflective Positive Mode
z Viewing Direction : 6 O’clock
z Driving Scheme : 1/8 Duty Cycle, 1/4 Bias
z Power Supply Voltage : 5.0 Volt (typ.)
z Backlight : LED, Yellow Green, Lightbox
z V
z Display Fo rmat : 20 x 1 Characters
z Operation temperature : -20°C to +70°C
z Storage temperature : -30°C to +80°C
z LCD-Driver : ST7066 (Sitronix)
z Internal Memory : CGROM (13200 bits)
z Interface : Easy Interface with 4-bit or 8-bit MPU
Adjustable For Best Contrast : 4.5 Volt (typ.)
LCD
: CGRAM (64 x 8 bits )
: DDRAM (80 x 8 bits )
2. MECHANICAL SPECIFICATIONS
z Module Size : 182.00 x 33.50 x 14.50 mm
z Character Pitch : 7.40 x 10.20 mm
z Character Size : 6.70 x 9.40 mm
z Character Font : 5 x 7 dots + cursor line
z Dot Size : 1.30 x 1.30 mm
z Dot Pitch : 1.35 x 1.35 mm
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DEM 20121 SYH-LY Product Specification
3. EXTERNAL DIMENSIONS
Version:4.1.1 PAGE:3
DEM 20121 SYH-LY Product Specification
4. BLOCK DIAGRAM
DB0~DB7
E
R/W
RS
V
0
VDD
VSS
A
K
LCD
Controller
LSI
ST7066
BACKLIGHT
COM1~COM8
SEG1~SEG40
Control Signals
LCD PANEL
1 Line x 20 Characters
SEG41~SEG100
SEGMENT
DRIVER
ST7063
5.PIN ASSIGNMENT
Pin No. Symbol Function
1 VSS
2 VDD
3 V0
4 RS
5 R/W
6 E
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
15 LED – (K)
16 LED + (A)
Ground terminal of module.
Power terminal of module 5.0V.
Power Supply for liquid crystal drive.
Register select
RS = 0…Instruction register
RS = 1…Data register
Read /Write
R/W = 1…Read
R/W = 0…Write
Read/Write Enable Signal
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.
Please also refer to 6.1 PCB drawing and description.
Version:4.1.1 PAGE:4
DEM 20121 SYH-LY Product Specification
6. PCB DRAWING AND DESCRIPTION
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: In application module, J3=J5=closed and J2=J4=open
6-1-2. The metal-bezel is set be ground when the J1 is closed
Note: In application module, J1=closed
6-1-3. The LED resistor should be bridged when the J6 is open
Note: In application module, J6=open
6-1-4. The mounting-hole is set be ground when the J7 is closed
Note: In application module, J7=closed
6-1-5. The R7 and the R8 are the LED resistor.
LED Polarity
15 Pin 16 Pin
Note: In application module, R7=6.8 Ohm and R8=5.6 Ohm.
Version:4.1.1 PAGE:5
DEM 20121 SYH-LY Product Specification
7. BACKLIGHT ELECTRICAL/OPTION CHARATERISTICS
8. 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
Operating temperature Topr -20 ~ +70
Storage temperature
Version:4.1.1 PAGE:6
VIN -0.3 ~ VDD+0.3
Tstg
-15.0 ~ VDD+0.3
DD
-30 ~ +80
Unit
V
V
V
°C
°C
DEM 20121 SYH-LY Product Specification
9. ELECTRICAL CHARACTERISTICS
9-1 DC Characteristics (VDD=5V, Ta=-20~+70°C)
Item Symbol
Operating Voltage V
Consumed Current I
DD
DD
Standard Value
MIN TYP MAX
4.7 5 5.3
---- TBD ---- mA
Test
Condition
-------
Unit
V
LCD Driving Voltage VLCD 3.0 4.5 13.0 VDD-V5 (1/5,1/4 Bias) V
9-2. AC Characteristics (VDD=5V , Ta=-20~+70°C)
9 -2-1 Write mode (writing data from MPU to ST7066)
Characteristic Symbol Min Type Max Unit Test PIN
E Cycle Time t
E Rise Time
E Fall Time t
E Pulse width (High,Low)
t
C
t
R
F
PW
1200 --- --- ns E
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
R/W and RS Set-up Time t
R/W and RS Hold Time t
Data Set-up Time t
Data Hold Time t
AS
AH
DSW
H
0 --- --- ns R/W,RS,E
10 --- --- ns R/W,RS,E
40 --- --- ns DB0~DB7
10 --- --- ns DB0~DB7
Version:4.1.1 PAGE:7
DEM 20121 SYH-LY Product Specification
9-2-2 Read mode (reading data from ST7066 to MPU)
Characteristic Symbol Min Type Max Unit Test PIN
E Cycle Time t
C
1200 --- --- ns E
E Rise Time
E Fall Time t
E Pulse width (High, Low)
R/W and RS Set-up Time t
R/W and RS Hold Time t
Data Setup Time t
Data Hold Time t
t
R
F
t
PW
AS
AH
DDR
H
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W,RS
10 --- --- ns R/W,RS
--- ---
100
ns DB0~DB7
10 --- --- ns DB0~DB7
Version:4.1.1 PAGE:8
DEM 20121 SYH-LY Product Specification
10. CONTROL AND DISPLAY COMMAND
Description
Time
(270KHz)
1.52 ms
1.52 ms
37 us
37 us
37 us
37 us
37 us
37 us
0 us
37 us
37 us
Instruction
Clear
Display
Return
Home
Entry Mode
Set
Display
ON/OFF
Cursor or
Display
Shift
Function
Set
Set CGRAM
address
Set DDRAM
address
Read Busy
flag and
address
Write data to
RAM
Read data
from RAM
Instruction Code
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 1 X
0 0 0 0 0 0 0 1 I/D S
0 0 0 0 0 0 1 D C B
0 0 0 0 0 1 S/C R/L X X
0 0 0 0 1 DL N F X X
0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0
0 0 1 AC6 AC5 AC4 AC3 AC2 AC1 AC0
0 1 BF AC6 AC5 AC4 AC3 AC2 AC1 AC0
1 0 D7 D6 D5 D4 D3 D2 D1 D0
1 1 D7 D6 D5 D4 D3 D2 D1 D0
Description
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
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)
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:4.1.1 PAGE:9
DEM 20121 SYH-LY Product Specification
11. STANDARD CHARACTER PATTERN (ST7066-0A)
Version:4.1.1 PAGE:10
DEM 20121 SYH-LY Product Specification
12. LCM INITIALIZATION
Version:4.1.1 PAGE:11
DEM 20121 SYH-LY Product Specification
Version:4.1.1 PAGE:12
DEM 20121 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 tem peratures 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:4.1.1 PAGE:13
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