DISPLAY Elektronik GmbH
LCD MODULE
DEM 16481 SYH-LY
Product Specification Version :1.1.1
16/Jan/2009
DEM 16481 SYH-LY Product Specification
GENERAL SPECIFICATION
MODULE NO. :
DEM 16481 SYH-LY
CUSTOMER P/N
VERSION NO. CHANGE DESCRIPTION DATE
0 ORIGINAL VERSION 16.01.2001
1 ADD MODEL 06.11.2002
1.1.0 CHANGE IC 14.01.2008
1.1.1 CHANGE PCB DESCRIPTION 16.01.2009
PREPARED BY: OYQ DATE: 16.01.2009
APPROVED BY: MH DATE: 16.01.2009
Version: 1.1.1 PAGE:0
DEM 16481 SYH-LY Product Specification
CONTENTS
1. FUNCTIONS & FEATURES ------------------------------------------------------------------2
2. MECHANICAL SPECIFICATIONS ---------------------------------------------------------2
3. BLOCK DIAGRAM ----------------------------------------------------------------------------3
4. EXTERNAL DIMENSIONS-------------------------------------------------------------------4
5. PIN ASSIGNMENT-----------------------------------------------------------------------------4
6. PCB DRAWING AND DESCRIPTION------------------------------------------------------5
7. BACKLIGHT & SWITCH---------------------------------------------------------------------6
8. DISPLAY DATA RAM -------------------------------------------------------------------------6
9 MAXIMUM ABSOLUTE POWER RATINGS----------------------------------------------7
10. ELECTRICAL CHARACTERISTICS------------------------------------------------------7
11. CONTROL AND DISPLAY COMMAND -------------------------------------------------9
12. STANDARD CHARACTER PATTERN(ST7066U-0A) ------------------------------- 10
13. LCD MODULES HANDLING PRECAUTIONS--------------------------------------- 11
14. OTHERS -------------------------------------------------------------------------------------- 11
Version: 1.1.1 PAGE:1
DEM 16481 SYH-LY Product Specification
1. FUNCTIONS & FEATURES
MODULE NAME LCD TYPE
DEM 16481 SYH-LY 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 Display contents : 16 x 4 Characters
z Backlight : LED, Yellow-Green, Lightbox
z Internal Memory : CGROM (8,320 bits )
: CGRAM (64 x 8 bits )
: DDRAM (80 x 8 bits)
z CGROM : CGROM of the ST7066U (Sitronix)
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
2. MECHANICAL SPECIFICATIONS
z Module Size
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
: 87.00 x 60.00 x 13.50 mm
Version: 1.1.1 PAGE:2
DEM 16481 SYH-LY Product Specification
3. BLOCK DIAGRAM
LCD PANEL
DB0~DB7
E
R/W
RS
V
V
V
A
K
0
DD
SS
LCD
Controller
LSI
ST7066
BACKLIGHT
COM1~COM16
SEG1~SEG40
Control signals
4line
SEGMENT
DRIVER
ST7065
characters
*16
SEG41~SEG80
SEG81~SEG160
SEGMENT
DRIVER
ST7063
Version: 1.1.1 PAGE:3
DEM 16481 SYH-LY Product Specification
4. EXTERNAL DIMENSIONS
5
5. PIN ASSIGNMENT
Pin No. Symbol Function
1 VSS Ground terminal of module.
2 VDD Power terminal of module 5.0V.
3 V0 Power Supply for liquid crystal drive.
Register select
4 RS
5 R/W
6 E Read/Write Enable Signal
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
15 LED – (K) Please also refer to 6.1 PCB drawing and description.
16 LED + (A) Please also refer to 6.1 PCB drawing and description.
RS = 0 - Instruction register
RS = 1 - Data register
Read /Write
R/W = 1 - Read
R/W = 0 - Write
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.
Version: 1.1.1 PAGE:4
DEM 16481 SYH-LY Product Specification
6. PCB DRAWING AND DESCRIPTION
Note:The part no. DEM16481 is printed on the PCB.
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= close, J2=J4=open
6-1-2. The metal-bezel should be on ground when the J1 is solder-Bridge.
Note: In application module,J1 should be closed
6-1-3. The LED resistor should be bridged when the J6 is solder-Bridge.
Note: In application module,J6 should be open.
6-1-4. The R7 and the R8 are the LED resistor.
Note: In application module, R7=R8=15Ω
LED Polarity
15 Pin 16 Pin
6-1-5. The mounting holes are set to ground when J7 is closed:
Note: In application module, J7 is closed.
Version: 1.1.1 PAGE:5
DEM 16481 SYH-LY Product Specification
7. BACKLIGHT & SWITCH
A
K
8. DISPLAY DATA RAM (DDRAM)
1514
4D 4E 4F
1D 1E 1F
5D 5E 5F
16
FIRST
LINE
SECOND
LINE
THIRDD
LINE
FOURTH
LINE
1
40
10
50
32
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F00
41
42 43
11
12 13
51
52 53
54
44 45
14 15
54 55
7
6
47
46
16
56
17
57
48 49
18 19
58 59
11
1098
4A 4B
1A 1B
5A 5B
1312
4C
1C
5C
9. MAXIMUM ABSOLUTE LIMIT
Item Symbol Standard value
Power supply voltage(1) VDD -0.3~+7.0
Power supply voltage(2) V
Input voltage
V
LCD
-15.0~VDD+0.3
DD
VIN -0.3~VDD+0.3
Unit
V
V
V
Operating temperature Topr -20~+70
Storage temperature
Tstg
-30~+80 °C
°C
*Voltage greater than above may damage to the Circuit.
VDD＞V1＞V2＞V3＞V4＞V5
Version: 1.1.1 PAGE:6
DEM 16481 SYH-LY Product Specification
10. ELECTRICAL CHARACTERISTICS
10-1-1 DC Characteristics (VDD=4.5V~5.5V,Ta=-20~+70°C)
Standard Value
Item Symbol
MIN TYP MAX
Operating Voltage V
Supply Current I
DD
DD1
LCD Driving Voltage VLCD
4.5 --- 5.5
---- 0.7 1.0
4.6
--- 10.0 VDD-V5(1/5,1/4 Bias) V
10-2-1 AC Characteristics
10-2-1 Write mode (writing data from MPU to ST7066)
Item Symbol Min
E Cycle Time t
E Rise/Fall Time tR,t
E Pulse Width (High, Low) t
R/W and RS Setup Time t
R/W and RS Hold Time t
Data Setup Time t
Data Hold Time t
su1
su2
C
F
w
H1
H2
1200
---
140
0
10
40
10
Typ
10-2-2 Read Mode (Reading Data from ST7066 to MPU)
Characteristic Symbol Min Type Max Unit Test PIN
E Cycle Time t
C
1200 --- --- ns E
Test
Condition
-------
Ceramic oscillation
fosc=250kHz
Max
--25
---
---
---
---
---
Unit
ns -
--
ns
ns
ns
-
ns
--
ns
--
ns
--
Unit
V
mA
Test PIN
E
E
E
R/W,RS,E
R/W,RS,E
DB0~DB7
DB0~DB7
E Rise Time
E Fall Time t
E Pulse width
Address Setup Time t
Address Hold Time t
Data Setup Time
Data Hold Time
t
tp
AS
AH
t
DDR
t
R
F
W
H
--- --- 25 ns E
--- --- 25 ns E
140 --- --- ns E
0 --- --- ns R/W,RS,E
10 --- --- ns R/W,RS,E
--- ---
100
ns DB0~DB7
10 --- --- ns DB0~DB7
Version: 1.1.1 PAGE:7
DEM 16481 SYH-LY Product Specification
10-2-3 Write mode
RS
R/W
E
DB0~DB 7
VIH1
VIL1
tAS
tPW
tr
tDSW
Valid Data
tAH
VIL1
tAH
tr
tH
tC
10-2-4 Read mode
RS
R/W
E
DB0~DB7
VIH1
V
IL1
tAS
tPW
tr
tDDR
Val id Data
tC
tAH
tAH
tr
tH
Version: 1.1.1 PAGE:8
DEM 16481 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 0 0 0 0 0 0 0 0 1 x 1.52ms
0 0 0 0 0 0 0 0 0 1 1.52ms
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.
Entry mode
Set
Display
on/off
control
Cursor
or
Display Shift
function
Set
Set CGRAM
address
Set DDRAM
address
Sets cursor move direction and specifies
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
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
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
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 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
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)
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: 1.1.1 PAGE:9
DEM 16481 SYH-LY Product Specification
12. STANDARD CHARACTER PATTERN (ST7066U-0A)
Up per(4bit)
Lo w e rr(4b it)
0000
0000
CG RAM
( 1 )
0001 0010 0011 0100 0101 0110 0111 1000 1001 10010 1011 1100 1101 1110 1111
0001
0010
0011
0100
0101
0110
0111
1000
( 2 )
( 3 )
( 4 )
( 5 )
( 6 )
( 7 )
( 8 )
( 1 )
1001
1010
1011
1100
1101
1110
1111
( 2 )
( 3 )
( 4 )
( 5 )
( 6 )
( 7 )
( 8 )
Version: 1.1.1 PAGE:10
DEM 16481 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 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: 1.1.1 PAGE:11
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