DISPLAY Elektronik GmbH
LCD MODULE
DEM 20487 SBH-PW-N
Product specification Version: 7
24.Aug.2011
GENERAL SPECIFICATION
MODULE NO. :
DEM 20487 SBH-PW-N
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION
0 ORIGINAL VERSION 08.05.2008
1 ADD VERSION 21.05.2008
2
3 UPDATE PCB DESCRIPTION 18.09.2008
4 ADD VERSION 14.04.2011
5
6 UPDATE BACKLIGHT 02.06.2011
7 ADD VERSION 24.08.2011
UPDATE MECHANICAL
DRAWING
CHANGE BACKLIGHT
RESISTOR
DATE
10.06.2008
27.042011
PREPARED BY: LX DATE: 24.08.2011
APPROVED BY: MHO
DATE: 24.08.2011
DEM 20487 SBH-PW-N 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 DESCRIPTION ..................................................................................4
7. BACKLIGHT ELECTRICAL/OPTION CHARATERISTICS.................................................6
8. DISPLAY DATA RAM (DDRAM)..........................................................................................7
9. MAXIMUM ABSOLUTE LIMIT (TA=25°C) .........................................................................7
10. ELECTRICAL CHARACTERISTICS .................................................................................7
12. STANDARD CHARACTER PATTERN .............................................................................10
13. LCM INITIALIZING BY INSTRUCTION......................................................................... 11
14. LCD MODULES HANDLING PRECAUTIONS.................................................................13
15. OTHERS..........................................................................................................................13
Version: 7 PAGE: 1
DEM 20487 SBH-PW-N Product Specification
1. FUNCTIONS & FEATURES
MODULE LCD TYPE
DEM 20487 SBH-PW-N STN Blue Transmissive Negative Mode
z Viewing Direction : 6 O’clock
z Driving Scheme : 1/16 Duty Cycle, 1/5 Bias
z Power Supply Voltage : 5.0 Vo lt (typ.)
z Backlight Color : White
z VLCD
z Display contents : 20x4 Characters
z Internal Memory : CGROM (13200 bits )
: DDRAM (80 x 8 bits for Digits)
z Interface : Easy Interface with a 4-bit or 8-bit MPU
z ROHS : Compliant
: 4.5 Volt (typ.)
: CGRAM (64 x 8 bits )
2. MECHANICAL SPECIFICATIONS
z Module Size : 146,00 x 62,50 x 14,00 mm
z Character Pitch : 6,00 x 9,75 mm
z Character Size : 4,85 x 9,23 mm
z Character Font : 5 x 8 dots
z Dot Size : 0,93 x 1,11 mm
z Dot Pitch : 0,98 x 1,16 mm
Version: 7 PAGE: 2
DEM 20487 SBH-PW-N Product Specification
3. EXTERNAL DIMENSIONS
4. BLOCK DIAGRAM
DB0~DB7
E
R/W
RS
V0
VDD
VSS
LCD
Controller
LSI
ST7066
COM1~COM16
SEG1~SEG40
Control signals
LCD PANEL
4 Line x 20 Characters
SEG41~SEG120
SEGMENT
DRIVER
ST2067
SEGMENT
DRIVER
ST2067
SEG121~SEG20
A
K
BACKLIGHT
Version: 7 PAGE: 3
DEM 20487 SBH-PW-N Product Specification
5. PIN ASSIGNMENT
Pin No. Symbol Function
1 VSS
2 VDD
3 V0 Power Supply for LCD
4 RS Register Select RS=0: Instruction Register; RS=1: Data Register
5 R/W Read / Write R/W=0: Read; R/W=1: 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)
17 NC No connect
18 NC No connect
Ground terminal of module
Power supply of module 5V
Bi-directional data bus, data transfer is performed once, thru DB0~DB7,
in the case of interface data. Length is 8-bit; and twice, thru DB4~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.
6. PCB DRAWING AND DESCRIPTION
6.1 PCB DRAWING
Note: The PCB drawing just for reference!! The”DEM20487” Print on the front side of PCB.
Version: 7 PAGE: 4
DEM 20487 SBH-PW-N 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: In application module, J2=J4= open and J3=J5=0 Ohm.
6-1-2. The metal-bezel is set be on ground when the J1 is closed.
Note: In application module, J1=0 Ohm.
6-1-3. The LED resistor on board is used when J6 is open.
Note: In application module, J6=open.
6-1-4.The R7 and the R8 are the LED resistor.
Note: In application module, R7=R8=33 Ohm.
6-1-5. The mounting holes is set on ground when the J7 is closed.
LED Polarity
15 Pin 16 Pin
Note: In application module, J7=0 Ohm.
6.2 Example application
6-2-1. The LED resistor should be bridged as following.
R8
R7
J6
6-2-2. The 15 pin is the anode and the 16 pin is the cathode as following.
J3
J4
J5
6-2-3.The 15 pin is the cathode and the 16 pin is the anode as following.
J2
J4
J5
6-2-4.The metal-bezel is on ground as following.
J1
J2
J3
Version: 7 PAGE: 5
DEM 20487 SBH-PW-N Product Specification
7. BACKLIGHT ELECTRICAL/OPTION CHARATERISTICS
Version: 7 PAGE: 6
DEM 20487 SBH-PW-N Product Specification
8. DISPLAY DATA RAM (DDRAM)
7
6
06
05
45
46
1A 1B
19
59
9
8
08
07
47
48
1C
5B5A
5C
11
10
09
0A
4A
49
1D 1E 1F
12
0B
4B
5F5E5D
14
13
0C
4C
20 21 22 23 24 25 26 27
15
0D
0E4E0F 10
4D
17
16
4F
18 19
11
12
51
50
52 53
20
13
6766656463626160
FIRST
LINE
SECOND
LINE
THIRDD
LINE
FOURTH
LINE
1
00
40
14 15
5
4
3
2
04
03
02
01
41
42
16
5554
56
44
43
17
18
57
58
9. MAXIMUM ABSOLUTE LIMIT (Ta=25°C)
Item Symbol Standard value Unit
Power supply voltage (1) VDD -0.3~+7.0 V
Power supply voltage (2) V0 V
-10.0~VDD+0.3 V
DD
Input voltage VIN -0.3~VDD+0.3 V
Operating temperature Topr -20~+70 °C
Storage temperature Tstg -25~+75 °C
*Voltage greater than above may damage to the Circuit.
VDD＞V1＞V2＞V3＞V4＞V5
10. ELECTRICAL CHARACTERISTICS
Test
--------
Unit
V
10-1 DC Characteristics(VDD=5V,Ta=25°C)
Standard Value
Item Symbol
Operating Voltage V
DD
MIN TYP MAX
4.7 5.0 5.3
Condition
LCD Driving Voltage VLCD 4.2 4.5 4.8 VDD-V5 V
Consume Current IDD ---- TBD ----- ------- uA
10-2. AC Characteristics (VDD=5V , Ta=25°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
E Fall Time t
E Pulse width (High,Low)
R/W and RS Set-up Time t
t
t
PW
C
R
F
AS
1200 --- --- ns E
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W,RS,E
R/W and RS Hold Time t
Data Set-up Time t
Data Hold Time t
AH
DSW
H
10 --- --- ns R/W,RS,E
40 --- --- ns DB0~DB7
10 --- --- ns DB0~DB7
Version: 7 PAGE: 7
DEM 20487 SBH-PW-N 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
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: 7 PAGE: 8
DEM 20487 SBH-PW-N Product Specification
11. CONTROL AND DISPLAY COMMAND
Version: 7 PAGE: 9
DEM 20487 SBH-PW-N Product Specification
12. STANDARD CHARACTER PATTERN
Version: 7 10
DEM 20487 SBH-PW-N Product Specification
13. LCM INITIALIZING BY INSTRUCTION
Version: 7 PAGE: 11
DEM 20487 SBH-PW-N Product Specification
Version: 7 PAGE: 12
DEM 20487 SBH-PW-N Product Specification
14. LCD Modules Handling Precautions
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: 7 PAGE: 13
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