DISPLAY Elektronik GmbH
LCD MODULE
DEM 20231 SYH-PY-CYR22
Product Specification
Version:2
02/Aug/2011
GENERAL SPECIFICATION
MODULE NO. :
DEM 20231 SYH-PY-CYR22
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION DATE
0 Original Version 14.06.2004
1 CHANGE IC 27.12.2007
2 ADD VERSION 02.08.2011
PREPARED BY: LX DATE: 02.08.2011
APPROVED BY: WH DATE: 02.08.2011
DEM 20231 SYH-PY-CYR22 Product Specification
CONTENTS
1. FUNCTIONS & FEATURES-----------------------------------------------------------------2
2. MECHANICAL SPECIFICATIONS --------------------------------------------------------2
3. BLOCK DIAGRAM ---------------------------------------------------------------------------2
4. EXTERNAL DIMENSIONS-----------------------------------------------------------------3
5. PIN ASSIGNMENT---------------------------------------------------------------------------4
6. PCB DRAWING AND DESCRIPTION-----------------------------------------------------4
7. BACKLIGHT & SWITCH--------------------------------------------------------------------5
8. DISPLAY DATA RAM (DDRAM) ----------------------------------------------------------6
9. MAXIMUM ABSOLUTE POWER RATINGS --------------------------------------------7
10. ELECTRICAL CHARACTERISTICS-----------------------------------------------------7
11. CONTROL AND DISPLAY COMMAND ------------------------------------------------9
12. STANDARD CHARACTER PATTERN --------------------------------------------------10
13. LCD MODULES HANDLING PRECAUTIONS----------------------------------------14
14. OTHERS ---------------------------------------------------------------------------------------14
Version: 2 PAGE:1
DEM 20231 SYH-PY-CYR22 Product Specification
1. FUNCTIONS & FEATURES
MODULE LCD TYPE
DEM 20231 SYH-PY-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 : 5.0 Volt (typ.)
z VLCD Adjustable for Best Contrast : 4.5 Volt (typ.)
z Backlight Color : Yellow Green, Lightguide
z Display contents : 20x2 Characters (5x8 dots, Format: 208 Kinds )
z Internal Memory : CGROM (10,080 bits )
: CGRAM (64 x 8 bits )
: DDRAM (80 x 8 bits for Digits)
z CGROM
z Interface : Easy Interface with a 4-bit or 8-bit MPU
: CGROM of the ST7066-0T (Cyrillic Character Font)
2. MECHANICAL SPECIFICATIONS
z Module Size : 116.00 x 37.00 x 12.00 mm (max.)
z Character Pitch : 3.70 x 5.95 mm
z Character Size : 3.20 x 5.55 mm
z Character Font : 5 x 8 dots
z Dot Size : 0.60 x 0.65 mm
z Dot Pitch : 0.65 x 0.70 mm
3. BLOCK DIAGRAM
COM1~COM16
DB0~DB7
E
R/W
RS
V0
VDD
VSS
A
K
LCD
Controller
LSI
ST7066U-0T
SEG1~SEG40
BACKLIGHT
Control signals
LCD PANEL
2 Line * 20 Characters
SEG41~SEG100
ST7063
Version: 2 PAGE:2
DEM 20231 SYH-PY-CYR22 Product Specification
4. EXTERNAL DIMENSIONS ( unit: mm)
□:
5. PIN ASSIGNMENT
Pin No. Symbol
1 VSS Ground terminal of module
2 VDD Supply terminal of module +5 V
3 VLCD Power Supply for LCD
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
16
LED(-)
LED(+)
Bi-directional Data Bus, Data Transfer is performed is once , thru DB0~DB7 , in
the case of interface data . Length is 8-bits; and twice , thru DB4~DB7 in the case
of interface data length is 4-bits. Upper four bits first then lower four bits .
LED power supply terminals.
Function
Version: 2 PAGE:3
DEM 20231 SYH-PY-CYR22 Product Specification
6. PCB DRAWING AND DESCRIPTION
Note: The part no. DEM20231-CYR22 is printed on the PCB.
DESCRIPTION:
6-1-1.The polarity of the pin 15 and the pin 16:
Each closed Each open Cathode Anode
Note: in application module, J2=J4=open, J3=J5=closed.
6-1-2. The metal-bezel should be on ground when the J1 is solder-Bridge.
Note: in application module, J1= closed.
6-1-3.The LED resistor should be bridged when the J6 is solder-Bridge.
Note: in application module, J6=open
6-1-4.The R7 and the R8 are the LED resistor.
Note: in application module, R7=12Ohm, R8=open
J3,J5 J2, J4
Each open Each closed Anode Cathode
LED Polarity
15 Pin 16 Pin
Version: 2 PAGE:4
DEM 20231 SYH-PY-CYR22 Product Specification
7. BACKLIGHT & SWITCH (Ta=-20~+70°C)
VR=5 V Ea c h c h i p
□:
8. DISPLAY DATA RAM (DDRAM)
9. MAXIMUM ABSOLUTE POWER RATINGS (Ta=25°C)
Item Symbol Standard value Unit
Power supply voltage (1) VDD -0.3~+7.0 V
Power supply voltage (2) V
Input voltage
Operating temperature Topr -20~+70 °C
Storage temperature Tstg -25~+75 °C
V
LCD
-0.3~VDD+0.3
V
IN
-15.0~VDD+0.3 V
DD
V
*Voltage greater than above may damage to the Circuit. VDD＞V1＞V2＞V3＞V4＞V5
Version: 2 PAGE:5
DEM 20231 SYH-PY-CYR22 Product Specification
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
Unit
LCD Driving Vo ltage VLCD 3.0 4.5 13.0 VDD-V5 (1/5 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 Type 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
C
R
F
W
SU1
H1
1200 --- --- ns E
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W,RS
10 --- --- ns R/W,RS
Data Set-up Time t
Data Hold Time t
VIH1
RS
VIL1
R/W
E
tr
DB0~DB 7
tAS
SU2
H2
40 --- --- ns DB0~DB7
10 --- --- ns DB0~DB7
tAH
VIL1
tPW
tDSW
Valid Data
tAH
tr
tH
tC
Version: 2 PAGE:6
DEM 20231 SYH-PY-CYR22 Product Specification
10-2-2 Read mode (Reading data from module to MPU)
Characteristic Symbol Min Type 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
R/W
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
--- --- 120 ns DB0~DB7
10 --- --- ns DB0~DB7
tAH
tPW
tAH
tr
E
DB0~DB7
tr
tDDR
Valid Data
tC
tH
Version: 2 PAGE:7
DEM 20231 SYH-PY-CYR22 Product Specification
11. CONTROL AND DISPLA Y 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 in the busy state (BF=00 before sending an instruction from the MPU to the ST7066U. If
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)
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.
Version: 2 PAGE:8
DEM 20231 SYH-PY-CYR22 Product Specification
12. STANDARD CHARACTER PATTERN (ST7066U-0T)
Version: 2 PAGE:9
DEM 20231 SYH-PY-CYR22 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.
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: 2 PAGE:10
Loading...