DISPLAY Elektronik GmbH
LCD MODULE
DEM 20485 SBH-PW-N
Product Specification Version : 5.1.0
14/July/2008
GENERAL SPECIFICATION
MODULE NO. :
DEM 20485 SBH-PW-N
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION DATE
0 ORIGINAL VERSION 17.12.2002
1 ADDING VERSION 27.07.2003
2 ADDING VERSION 04.11.2003
3 ADDING VERSION 26.04.2005
4 MODIFY DESCIPTION 19.06.2006
5 MODIFY DESCRIPTION 11.04.2007
5.1.0 CHANGE IC 14.11.2007
PREPARED BY: LSY DATE: 14.11.2007
APPROVED BY: MH DATE: 14.07.2008
DEM 20485 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 VOLTAGE AND CURRENT ........................................................................................6
8. DISPLAY DATA RAM............................................................................................................................6
9. MAXIMUM ABSOLUTE LIMIT..........................................................................................................7
10. ELECTRICAL CHARACTERISTICS ...............................................................................................7
11. CONTROL AND DISPLAY COMMAND...........................................................................................9
12. STANDARD CHARACTER PATTERN (ST7066-0A) ....................................................................10
13. LCM INITIALIZING BY INSTRUCTION......................................................................................11
14. LCD MODULES HANDLING PRECAUTIONS.............................................................................13
15. OTHERS...............................................................................................................................................13
Version: 5.1.0 PAGE: 1
DEM 20485 SBH-PW-N Product Specification
1. FUNCTIONS & FEATURES
MODULE NAME LCD TYPE Remark
DEM 20485 SBH-PW-N STN Blue Transmissive Negative Mode RoHS Conformed
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 Backlight Color : LED, White, Lightguide
z V
z Display contents : 20 x 4 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 Interface : Easy Interface with a 4-bit or 8-bit MPU
z Operating Temperature : -20°C to +70°C
z Storage Temperature : -25°C to +75°C
Adjustable For Best Contrast : 4.5 Volt (typ., VDD-V5)
LCD
2. MECHANICAL SPECIFICATIONS
z Module Size : 98.00 x 60.00 x 14.10 mm
z Character Pitch : 3.55 x 5.35 mm
z Character Size : 2.95 x 4.75 mm
z Character Font : 5 x 8 dots
z Dot Size : 0.55 x 0.55 mm
z Dot Pitch : 0.60 x 0.60 mm
z Dot Gap : 0.05 mm
Version: 5.1.0 PAGE:
2
DEM 20485 SBH-PW-N Product Specification
3. EXTERNAL DIMENSIONS
4. BLOCK DIAGRAM
DB0~DB7
E
R/W
RS
V0
VDD
VSS
LCD
Controller
LSI
ST7066U
COM1~COM16
SEG1~SEG40
Control signals
LCD PANEL
4 Line x 20 Characters
SEG41~SEG120
SEGMENT
DRIVER
ST7063
SEGMENT
DRIVER
ST7063
SEG121~SEG200
A
K
Version: 5.1.0 PAGE:
BACKLIGHT
3
DEM 20485 SBH-PW-N Product Specification
5. PIN ASSIGNMENT
Pin No. Symbol
1 VSS
2 VDD
3 V0 Power Supply for LCD
4 RS
5 R/W
6 E Enable signal
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
15 LED-(K) Place also refer to 6.1 PCB Drawing and description
16 LED-(A) Place also refer to 6.1 PCB Drawing and description
Function
Ground terminal of module
Power supply of module +5V
Register Select
RS=0 (Instruction Register)
RS=1 (Data Register)
Read or Write
R/W=1 (Read)
R/W=0 (Write)
Bi-directional Data Bus, Data Transfer is performed
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.
6. PCB DRAWING AND DESCRIPTION
DEM20485
R2
R3
R4
R
R
R1
J1
6
5
U1
U2
U3
J5
J4
J3
J2
K
A
R8
R7
J6
1
Version: 5.1.0 PAGE:
16
4
DEM 20485 SBH-PW-N Product Specification
6.1 DESCRIPTION:
6-1-1.The polarity of the pin 15 and the pin 16
symbol
J2,J4 Each solder-bridge Each open Each closed Anode Cathode
J3,J5 Each solder-bridge 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=0 Ohm
Note: In application module, J1=0 Ohm
6-1-3. The LED resistor on board are 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=12 Ohm, R8=open
6.2 Example application
6-2-1. The LED resistor should be bridged as following. Then customer needs to use internal resistors
J6
symbol
state
J3,J5 J2, J4
LED Polarity
15 Pin 16 Pin
R7
R8
6-2-2.The 15 pin is the cathode and the 16 pin is the anode as following
J4
J5 J2
0 Ohm resistor
0 Ohm resistor
6-2-3.The metal-bezel is on ground as following.
J1
J3
0 Ohm resistor
Version: 5.1.0 PAGE:
5
DEM 20485 SBH-PW-N Product Specification
7. BACKLIGHT VOLTAGE AND CURRENT
Item Symbol MIN. TYP. MAX. Unit Conditions
Forward Voltage Vf 4.0 - V
Forward Current If 40 60 80 mA Vf=4.0V
Power Dissipation Pd 0.24 W Vf=4.0V
Reverse Voltage VR 4.0 V
Reverse Current IR - 0.40 mA
Luminous Intensity LV 300 450 600 cd/m
Luminous Uniformity 70 %
Chromaticity coordinate
Emission W avelength
λ p
X=0.27
Y=0.27
White nm
-
X=0.33
Y=0.33
2
=20mA, Ta=25°C
I
f
=4.0V
V
f
Each chip
8. DISPLAY DATA RAM (DDRAM)
DISPLAY POSITION
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
FIRST LINE 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
SECOND LINE 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53
THIRD LINE 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27
FOURTH LINE 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67
DDRAM ADDRESS
Version: 5.1.0 PAGE:
6
DEM 20485 SBH-PW-N Product Specification
7
9. MAXIMUM ABSOLUTE LIMIT (Ta=25°C)
Item Symbol Standard value Unit
Power supply voltage VDD -0.3 ~ +7.0 V
LCD Driver voltage V
V
LCD
-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
10. ELECTRICAL CHARACTERISTICS
10-1 DC Characteristics(VDD=5.0V, Ta=-20~+70°C)
Item Symbol
Operating Voltage V
Supply Current I
LCD Driving Voltage
V
DD
DD
LCD
Standard Valu e
MIN TYP MAX
4.5 5 5.5 ------- V
---- 0.2 0.5
3.0 --- 10.0
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
T
R
Address Set-up Time T
Address Hold Time T
Data Set-up Time T
Data Hold Time T
C
PW
T
，
AS
AH
DSW
H
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
10 --- --- ns DB0~DB7
Condition
V
=5V,fosc=270kHz
DD
Test
VDD-V5
Unit
mA
V
Version: 5.1.0 PAGE:
DEM 20485 SBH-PW-N Product Specification
10-2-2 Read 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
C
PW
T
，
AS
AH
DDR
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: 5.1.0 PAGE:
8
DEM 20485 SBH-PW-N 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: 5.1.0 PAGE:
9
DEM 20485 SBH-PW-N Product Specification
12. STANDARD CHARACTER PATTERN (ST7066-0A)
Lowerr(4bit)
LLLL
LLLH
LLHL
LLHH
LHLL
LHLH
LHHL
Upper(4bit)
LLLL
CG RAM
(1)
(2)
(3)
(4)
(5)
(6)
(7)
LLLH LLHL LLHH LHLL LHLH LHHL LHHH HLLL HLLH HLHL HLHH HHLL HHLH HHHL HHHH
LHHH
HLLL
HLLH
HLHL
HLHH
HHLL
HHLH
HHHL
(8)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
HHHH
Version: 5.1.0 PAGE:
(8)
10
DEM 20485 SBH-PW-N Product Specification
13. LCM INITIALIZING BY INSTRUCTION
13-1 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 dots
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 dots
1 display on
C
1 cursor on
B
I/D
SH
1 blink on
1 increment mode
1 entire shift on
Version: 0 PAGE:
11
DEM 20485 SBH-PW-N Product Specification
13-2 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 dots
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 0 cursor off
0 0 1 D C B 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
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 dots
1 Display on
C
B
I/D
SH
1 cursor on
1 blink on
1 increment mode
1 entire shift on
Version: 5.1.0 PAGE:
12
DEM 20485 SBH-PW-N 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: 5.1.0 PAGE:
13
Loading...