2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
YELLOW
SCDQ5541P/Q/R
HIGH EFFICIENCY RED
SCDQ5542P/Q/R
GREEN
SCDQ5543P/Q/R
HIGH EFFICIENCY GREEN
SCDQ5544P/Q/R
Square 0.134" 4-Character
5x5 Dot Matrix Serial Input Dot Addressable
Intelligent Display
®
Devices
Typical Package Outline & Matrix SCDQ554XP SIP Package
SCDQ554XQ 90° SIP Package SCDQ554XR 90° Connector/Header Package
0.112 (2.83)
0.400 (10.16)
0.200 (5.08)
0.784 (19.91)
0.134 (3.40)
0.187 (4.75)
0.134 (3.40)
0.235 (5.96)
±.010 (±.25)
0.475 (12.07) Max.
±.445 (±11.30) Typ.
0.079 (2.00)
±.010 (±.25)
0.235 (5.96)
±.015 (±.38)
0.050 (1.27)
0.160 (4.06)
0.365 (9.27) Max.
0.345 (8.76) Typ.
0.393 (9.98)
±.015 (±.40)
.012 x .018 (.30 x .46)
±.002 (±.05) Pin
.012 x .018 (.30 x .46)
±.002 (±.05) Pin
0.079 (2.00) ±.010 (±.25)
Tolerance-Non Cum.
0.200 (5.08)
0.065 (1.65)
±.015 (±.38)
1.Par t marking is on this side of the display.
2.Mole x header, 53290-0510 mounted on the display.
3.Mole x receptacle, 52418-0510 mounted on the customer's PCB. Supplied by the customer.
Use Pin 1 designation on this drawing, not the Molex connector specification.
4.Unless otherwise specified all tolerances are ±.010 (±.25)
Pin 1
Pin 1
Pin 1
11
3
0.157 (4.00)
2
1
1
1
1
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
FEATURES
• Four 0.134" (3.40 mm) 5x5 Dot Matrix Characters in Yel-
low, High Efficiency Red, Green, or High Efficiency Green
• Optimum Display Surface Efficiency
(display area to package ratio)
• Square Character Format to Display Data in a
Vertical or Horizontal Format
• High Speed Data Input Rate: 5.0 MHz
• ROMless Serial Input, Dot Addressable Display—
Ideal for User Defined Characters
• Built-in Decoders, Multiplexers and LED Drivers
• Readable from 6 Feet (1.8 meters)
• Wide Viewing Angle, ±55
°
in X-Axis and Y-Axis
• Attributes:
– 100 Bit RAM for User Defined Characters
– Eight Dimming Levels
– Power Down Model (<250
µ
W)
– Software Clear Function
– Lamp Test
– 3.3 V Capability
DESCRIPTION
The SCDQ5541X (Yellow), SCDQ5542X (High Efficiency Red),
SCDQ5543X (Green), and SCDQ5544X (High Efficiency Green)
are four digit, dot addressable 5x5 dot matrix, serial input,
alphanumeric Intelligent Display devices in a square format.
The four digits are packaged in a rugged, high quality, optically
transparent, plastic package several mounting options. The SIP
Pin for standard display mounting and 90
°
Bend SIP for side
mounting. Additionally, a connector/header configuration is also
available for display side mounting.
The on-board CMOS has a 100 bit RAM, one bit associated
with one LED, each to generate User Defined Characters. In
Power Down Mode, quiescent current is <50
µ
A.
The SCDQ554XX is designed for work with the serial port of
most common microprocessors. Data is transferred into the
display through the Serial Data Input (DATA), clocked by the
Serial Data Clock (SDCLK), and enabled by the Load Input
(LOAD).
Absolute Maximum Ratings
Operation in excess of any of these conditions may result in
permanent damage to this device (
T
A
=25
°
C).
Supply Voltage
V
CC
to Gnd (non-operating) ............ –0.5 to 7.0 V
Input Voltage, Any Pin to Gnd......................–0.5 to
V
CC
to 5.5 V
Operating Temperature Range .............................–40
°
C to 85
°
C
Storage Temperature (
T
S
) ...................................–40
°
C to 100
°
C
Relative Humidity (non-condensing).................................... 85
%
Maximum Solder Temperature, Connector Only
0.063” below Seating Plane T
≤
5 s................................ 260
°
C
Maximum Power Dissipation .............................0.65 W at 85
°
C
ESD (100 pF, 1.5 k
Ω
) ........................................................ 2.0 kV
Maximum Input Current ..............................................
±
100 mA
Electrical characteristics
(over operating temperature, un-
less otherwise specified,
T
A
=25
°
C)
Notes:
1)
I
CC
is an average value, the Peak current is
5
/
3
x
I
CC
.
2)
Contact manufacturer for 3.3 volt operation.
Parameter Min. Typ. Max. Units Conditions
V
CC
4.5 — 5.5 V —
I
CC
(Pwr. Dwn. Mode) — — 5.0
µ
A
V
CC
=5.0 V, all inputs=0 V or
V
CC
I
CC
(16 dots on per digit)
(1)
— 100 145 mA
V
CC
=5.0 V, “#” displayed in all 4 digits
at 100% brightness at 25
°
C
V
IH
3.5 — — V
V
CC
=4.5 V to 5.5 V
V
IL
— — 1.5 V
V
CC
=4.5 V to 5.5 V
I
IH
——10
µ
A
V
CC
=
V
IN=
5.0 V (all inputs)
I
IL
— — –10
µ
A
V
CC
=5.0 V,
V
IN
=0 V (all inputs)
Internal Mux Frequency 375 768 1086 Hz —
θ
ja
—65—
°
C/W —
Input Circuit
The input resistor/diode network shown below is used for ESD
protection and to eliminate substrate latch-up caused by input
voltage over/under shoot.
Figure 1. Inputs
VCC
1.0 kΩ
GND
input
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Figure 2.
Close Up of Data “Write” Cycle
Figure 3. Device Timing
Write Cycle Timing
(over operating temperature range,
V
CC
=
V
LL
=4.5 V to 5.5 V)
Notes:
1. T
WR
=Setup Time + 8 Clock Times + Hold Times + Time Between Writes.
2. Data is shifted into the display’s 8 bit shift register on the positive going edge of
the SDClk.
3. Shift register data is evaluated when Load\ goes high.
Symbol Description Min. Max. Units
T
LDS
Load Setup Time 50 — ns
T
DS
Data Setup Time 50 — ns
T
SDCLK
Clock Period 200 — ns
T
SDCW
(HI or LOW)
Clock Width 70 — ns
T
LDH
Load Hold Time 0 — ns
T
DH
Data Hold Time 25 — ns
T
WR
Total Write Time 2.25 —
µ
s
T
BL
Time Between Writes 600 — ns
T
RST
Reset Active Time 600 — ns
SDCLK
SDCLK
T
SDCW
T
DATA
LOAD
D0
DS
T
LDS
T
TDH
D7
LDH
T
LOAD
LOAD
DATA
DATA
SDCLK
SDCLK
D0 D1 D2 D3 D4 D5 D6 D7
D0 D1 D2 D3 D4 D5 D6 D7
D0
D0
BL
T
WR
T
OR
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Optical Characteristics at 25
°
C
(
V
CC
=5.0 V at 100% brightness level, viewing angle: X axis
±
55°, Y axis
±
65°)
Yellow SCDQ5541X
High Efficiency Red SCDQ5542X
Green SCDQ5543X
High Efficiency Green SCDQ5544X
Notes:
1. Dot to dot intensity matching at 100% brightness is 1.8:1.
2. Displays are binned for hue at 2.0 nm intervals.
3. Displays within a given intensity category have an intensity match-
ing of 1.5:1 (max.).
Pinout and Pin Definitions
Description Symbol Min. Typ. Units
Luminous Intensity
Character Average (# displayed all digits)
I
V
1.8 5.4 mcd
Peak Wavelength
λ
peak
— 583 nm
Dominant Wavelength
λ
dom
— 585 nm
Description Symbol Min. Typ.
Units
Luminous Intensity
Character Average (# displayed all digits)
I
V
1.8 5.4 mcd
Peak Wavelength
λ
peak
— 630 nm
Dominant Wavelength
λ
dom
— 620 nm
Description Symbol Min. Typ. Units
Luminous Intensity
Character Average (# displayed all digits)
I
V
1.8 5.4 mcd
Peak Wavelength
λ
peak
— 565 nm
Dominant Wavelength
λ
dom
— 570 nm
Description Symbol Min. Typ. Units
Luminous Intensity
Character Average (# displayed all digits)
I
V
2.1 6.4 mcd
Peak Wavelength λpeak — 568 nm
Dominant Wavelength λdom — 574 nm
Pin Function Definitions
1 LOAD Low input enables data clocking into
8-bit serial shift register. When LOAD
goes high, the contents of 8- bit serial
Shift Register will be decoded.
2 SDATA Serial data input
3 SDCLK Loads data into the 8-bit serial data
register on a low to high transition
4VCC Power supply
5 GND Power supply ground
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Figure 4. Dot Matrix Format
Figure 5. Character Address, Row, & Column Data Map
1. Viewed from the LED side of the display with the display in a hori-
zontal position.
2. The row address and column data are typical for all character positions.
The LED is on when the data bit = 1 and off when the data bit = 0.
Figure 6. Suggested Display Mounting
Operation of the SCDQ554XX
The SCDQ554XX display consists of a CMOS IC containing
control logic and drivers for four 5x5 characters. These compo-
nents are assembled in a compact plastic package.
Individual LED dot addressablity allows the user great freedom
in creating special characters or mini-icons. The User Definable
Character Set examples illustrate 200 different character and
symbol possibilities. Each example has the hexadecimal code
required to display characters in a horizontal or vertical format.
See Figure 6., Suggested Display Mounting for the display posi-
tioning. Generally, the contacts should be on the right side of
the display for the vertical format and on the top of the display
for the horizontal format.
SIP Package 90º SIP Connector/Header Packages
0.031
(0.79)
0.031
(0.79)
0.134
(3.40)
0.134
(3.40)
Char
0Char
1Char
2Char
3
Pins/Connector located
at the top of the display.
Col4(D4)
Col3(D3)
Col2(D2)
Col1(D1)
Col0(D0)
Rw0
Rw1
Rw2
Rw3
Rw4
PCB
Pins/Connector located
at the top of the display
Pins/Connector
located at the top
of the display
PCB
PCB
The serial data interface provides a highly efficient interconnec-
tion between the display and the mother board. The
SCDQ554XX requires only three input lines as compared to 15
for an equivalent four character parallel input part.
The on-board CMOS IC is the electronic heart of the display.
The IC accepts decoded serial data, which is stored in the inter-
nal RAM. Asynchronously the RAM is read by the character
multiplexer at a strobe rate that results in a flicker free display.
Figure 7. shows the three functional areas of the IC. These
include: the input serial data register and control logic, a 100
bits two port RAM, and an internal multiplexer/display driver.
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Figure 7. SCDQ Block Diagram
The following explains how to format the serial data to be loaded into the display. The user supplies a string of bit mapped decoded
characters. The contents of this string is shown in Figure 8.A. Figure 8.B shows that each character consists of six 8 bit words. The
first word encodes the display character location and the succeeding five bytes are row data. The row data represents the status
(On, Off) of individual column LEDs. Figure 8.C shows that each 8 bit word is formatted to include a three bit Operational Code
(OPCODE) defined by bits D7–D5 and five bits (D4–D0) representing Column Data, Character Address, or Control Word Data.
Figure 8.D shows the sequence for loading the bytes of data. Bringing the LOAD line low enables the serial register to accept data.
The shift action occurs on the low to high transition of the serial data clock (SDCLK). The least significant bit (D0) is loaded first.
After eight clock pulses the LOAD line is brought high. With this transition the OPCODE is decoded. The decoded OPCODE directs
D4–D0 to be latched in the Character Address register, stored in the RAM as Column data, or latched in the Control Word register.
The control IC requires a minimum 600 ns delay between successive byte loads.
Figure 8. Loading Serial Character Data
SD CLK
S DATA
LOAD
Counter Chain
& Timing
Oscillator
Row Decoder
& Driver
4 - 5x5
Characters
20
20
Column Logic
& Driver
Display Multiplexer
20 x 5 Bit
Dual Port Ram
LampTest
Brightness
Power Down
Serial Data Register
D7 D6 D5
OPCODE D4 D3 D2 D1 D0
DATA
OPCODE
Decoder
Software
Clear Character
Address
Register
Write
Character/Row
Address Decode
Column Output
Control
Word
Register
5
5
3
3
Character 0 Character 1 Character 2 Character 3
LOAD
SDCLK
DATA
TBL
600 nS
Min.
TBL
600 nS
Min.
Character Address
D0
C4
D0 D1 D2 D3 D4 D5 D6 D7 TBL DD
D1
C3
D2
C2
D3
C1
D4
C0
Character
Address 0
Row 0
Column Data
Row 1
Column Data
Row 2
Column Data
Row 3
Column Data
Row 4
Column Data
D0
0
D1
0
D2
0
D3
0
D4
0
D5
1
D6
0
D7
1
A
B
B
C
C
D
D
D5
0
D6
0
D7
0
OpcodeOpcode Column Data
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
The Character Address bits, D4–D0 stored in the Character Address Register and the Column Data Instruction’s Row Address bits,
D7–D5, direct the Column Data bits, D4–D0 to specific RAM location. See the Instruction Set Table for address and data format. Fig-
ure 9. shows the Row Address for the example character “D” See Figure 5., Character Address, Row, & Column Data Map for the
dot positioning (Display contacts are at the top of the display).
Column data is written and read asynchronously from the 200 bit RAM. Once loaded the internal oscillator and character multiplexer
reads the data from the RAM. These characters are row strobed with column data as shown in Figure 10. The character strobe rate
is determined by the internal IC’s÷320 counter.
Instruction Set
Row data is written to the character address contained in the Character Address Register.
Figure 9. Writing Character “D” Example
Row and Column Locations for a Character “D”
OPERATION D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
HEX DESCRIPTION
CONTROL WORD 1 1 1 1 L
T
B
r
B
r
B
r
F0+X Select Control Word plus operand
See Control Word Format
Power Down Mode 1 1 1 11111FF Power Down Mode–0% Brightness
SFT CLEAR 1 1 0 00000C0 Software Clear
ADDRESS 1 0 1 00000A0 Select Digit Address 0
REGISTER 1 0 1 00001A1 Select Digit Address 1
CHR ADRS 1 0 1 00010A2 Select Digit Address 2
0–3 10100011A3 Select Digit Address 3
COLUMN DATA
000D
4
D
3
D
2
D
1
D
0
00+X Row 0
D4–D0=Column Data
001D
4
D
3
D
2
D
1
D
0
20+X Row 1
D4–D0=Column Data
010D
4
D
3
D
2
D
1
D
0
40+X Row 2
D4–D0=Column Data
011D
4
D
3
D
2
D
1
D
0
60+X Row 3
D4–D0=Column Data
100D
4
D
3
D
2
D
1
D
0
80+X Row 4
D4–D0=Column Data
Op code
D7 D6 D5 Column Data
D4 D3 D2 D1 D0
C0 C1 C2 C3 C4
Hex
Row 0 0 0 0 1 1 1 1 0 1E
Row 1 0 0 1 1 0 0 0 1 31
Row 2 0 1 0 1 0 0 0 1 51
Row 3 0 1 1 1 0 0 0 1 71
Row 4 1 0 0 1 1 1 1 0 9E
off LED
on LED
Row 0
Row 1
Row 2
Row 3
Row 4 0 1 2 3 4
Columns
Previously “on” LED
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Figure 10. Row Strobe Example
The user can activate four Control functions. These include:
LED Brightness Level, Lamp Test, IC Power Down, or Display
Clear. OPCODEs and five bit words are used to initiate these
functions. The OPCODEs and Control Words for the Character
Address and Loading Column Data are shown in Instruction Set
Table.
The user can select seven specific LED brightness levels.
These brightness levels (in percentages of full brightness of the
display) include: 100% (F0HEX), 53% (F1HEX), 40% (F2HEX),
27% (F3HEX), 20% (F4HEX), 13% (F5HEX), and 6.6% (F6HEX).
The brightness levels are controlled by changing the duty factor
of the row strobe pulse.
Display Brightness
The SCDQ554X offers a unique Display Power Down feature
which reduces ICC to less than 50 µA. When FFHEX is loaded
the display is set to 0% brightness and the internal multiplex
clock is stopped. When in the Power Down mode data may still
be written into the RAM. The display is reactivated by loading a
new rightness Level Control Word into the display.
Power Down
The Lamp Test is enabled by loading F8HEX into the serial shift
register. This Control Word sets all of the LEDs to a 53% bright-
ness level. Operation of the Lamp Test has no affect on the
RAM and is cleared by loading a Brightness Control Word.
Op code
D 7 D6 D5 Control W ord
D4 D3 D2 D1 D0 Hex Operation
Level
111 10000 F0 100%
111 10001 F1 53%
111 10010 F2 40%
111 10011 F3 27%
111 10100 F4 20%
111 10101 F5 13%
111 10110 F6 6.6%
Op code
D 7 D 6 D 5
Control Word
D4 D3 D2 D1 D0
Hex Operation
Level
111 11111 FF 0%
brightness
LOAD ROW 0
ROW LOAD
Column 0
Column 1
Column 2
Column 3
Column 4
Row 0
Row 1
Row 2
Row 3
Row 4
Row 0
Row 1
Row 2
Row 3
Row 4
Row 0
Row 1
Row 2
Row 3
Row 4
Row 0
Row 1
Row 2
Row 3
Row 4
Column 0
Column 1
Column 2
Column 3
Column 4
Column 0
Column 1
Column 2
Column 3
Column 4
Column 0
Column 1
Column 2
Column 3
Column 4
LOAD ROW 1 LOAD ROW 2 LOAD ROW 3
Row 0
Row 1
Row 2
Row 3
Row 4
OAD ROW 4
Column 0
Column 1
Column 2
Column 3
Column 4
Lamp Test
The Software Clear (C0HEX) clears the Address Register and
the RAM. The display is blanked and the Character Address
Register will be set to Character 0. The internal counter and the
Control Word Register are unaffected. The Software Clear will
remain active until the next data input cycle is initiated.
Software Clear
Electrical & Mechanical Considerations
Interconnect Considerations
Optimum product performance can be had when the following
electrical and mechanical recommendations are adopted. The
SCDQ554XX’s IC is constructed in a high speed CMOS pro-
cess, consequently high speed noise on the SERIAL DATA,
SERIAL DATA CLOCK, and LOAD lines may cause incorrect
data to be written into the serial shift register. Adhere to trans-
mission line termination procedures when using fast line driv-
ers and long cables (>10 cm).
Good digital grounds (pin 1) and power supply decoupling (pin
2) will insure that ICC (<350 mA peak) switching currents do not
generate localized ground bounce. Therefore it is recom-
mended that each display package use a 0.1 µF and 20 µF
capacitor between VCC and ground.
Op code
D 7 D 6 D 5
Control Word
D4 D3 D2 D1 D0
Hex Operation
Level
1 1 1 1 0 B B B Lamp Test
(OFF)
1 1 1 1 1 0 0 0 F8 Lamp Test
(ON)
Op code
D 7 D 6 D 5
Control Word
D4 D3 D2 D1 D0
Hex Operation
Level
1 1 0 0 0 0 0 0 C0 CLEAR
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
ESD Protection
The input protection structure of the SCDQ554XX provides sig-
nificant protection against ESD damage. It is capable of with-
standing discharges greater than 2.0 kV. Take all the standard
precautions, normal for CMOS components. These include
properly grounding personnel, tools, tables, and transport carri-
ers that come in contact with unshielded parts. If these condi-
tions are not, or cannot be met, keep the leads of the device
shorted together or the parts in anti-static packaging.
Soldering Considerations
The SCDQ554XX can be hand soldered with SN63 solder using
a grounded iron set to 260°C.
Wave soldering is also possible following these conditions: Pre-
heat that does not exceed 93°C on the solder side of the PC
board or a package surface temperature of 85°C. Water soluble
organic acid flux (except carboxylic acid) or resin-based RMA
flux without alcohol can be used.
Wave temperature of 245°C ±5°C with a dwell between 1.5 s
to 3.0 s. Exposure to the wave should not exceed tempera-
tures above 260°C for five seconds at 0.063" below the seating
plane. The packages should not be immersed in the wave.
The SCDQ554XR connects to an external connector receptacle
which may be soldered before inserting the SCDQ554XR Dis-
play. In this way, only the connector is subject to the user’s sol-
dering process. The Molex 52418-0510 receptacle called out in
the product drawing can be used in solder reflow processes.
See Molex for specifications.
Post Solder Cleaning Procedures
The least offensive cleaning solution is hot D.I. water (60°C) for
less than 15 minutes. Addition of mild saponifiers is accept-
able. Do not use commercial dishwasher detergents.
For faster cleaning, solvents may be used. Exercise care in
choosing solvents as some may chemically attack the nylon
package. For further information refer to Appnotes 18 and 19 at
www.infineon.com/opto or in the current Infineon Optoelec-
tronic Data Book. See Appnote 19, Table 2, “Displays–
Group 2”.
Optical Considerations
The 0.123" high character of the SCDQ554XX gives readability
up to five feet. Proper filter selection enhances readability over
this distance.
Using filters emphasizes the contrast ratio between a lit LED
and the character background. This will increase the discrimina-
tion of different characters. The only limitation is cost. Take into
consideration the ambient lighting environment for the best
cost/benefit ratio for filters.
Incandescent (with almost no green) or fluorescent (with
almost no red) lights do not have the flat spectral response of
sunlight. Plastic band-pass filters are an inexpensive and effec-
tive way to strengthen contrast ratios. The SCDQ5542X is a
high efficiency red display and should be matched with long
wavelength pass filter in the 570 nm to 590 nm range. The
SCDQ5541X/3X/4X should be matched with a yellow-green
band-pass filter that peaks at 565 nm. For displays of multiple
colors, neutral density grey filters offer the best compromise.
Additional contrast enhancement is gained by shading the dis-
plays. Plastic band-pass filters with built-in louvers offer the
next step up in contrast improvement. Plastic filters can be
improved further with anti-reflective coatings to reduce glare.
The trade-off is fuzzy characters. Mounting the filters close to
the display reduces this effect. Take care not to overheat the
plastic filter by allowing for proper air flow.
Optimal filter enhancements are gained by using circular polar-
ized, anti-reflective, band-pass filters. The circular polarizing fur-
ther enhances contrast by reducing the light that travels through
the filter and reflects back off the display to less than 1%.
Several filter manufacturers supply quality filter materials.
Some of them are: Panelgraphic Corporation, W. Caldwell, NJ;
SGL Homalite, Wilmington, DE; 3M Company, Visual Products
Division, St. Paul, MN; Polaroid Corporation, Polarizer Division,
Cambridge, MA; Marks Polarized Corporation, Deer Park, NY,
Hoya Optics, Inc., Fremont, CA.
One last note on mounting filters: recessing displays and bezel
assemblies is an inexpensive way to provide a shading effect in
overhead lighting situations. Several Bezel manufacturers are:
R.M.F. Products, Batavia, IL; Nobex Components, Griffith Plas-
tic Corp., Burlingame, CA; Photo Chemical Products of Califor-
nia, Santa Monica, CA; I.E.E.-Atlas, Van Nuys, CA.
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Figure 11. SCDQ554XX Interface to Siemens/Intel 8031
Microprocessor (using serial port in mode 0)
Figure 12. SCDQ554XX Interface to Siemens/Intel 8031 Microprocessor (using one bit of parallel port as serial input)
Microprocessor Interface
The microprocessor interface is through the serial port, SPI port or one out of eight data bits on the eight bit parallel port and also
control lines SDCLK and LOAD.
Power Up Sequence
Upon power up display will come on at random. Thus the display should be reset at power-up. The reset will set the Address Regis-
ter to Digit 0, User RAM is set to 0 (display blank) the Control Word is set to 0 (100% brightness with Lamp Test off) and the internal
counters are reset.
Figure 13. SCDQ554XX Interface with Motorola 68HC05C4 Microprocessor (using SPI port)
SCDQ554XX
RST
XTAL
RXD
TXD
P3.3
20 µf
.01 µf
VCC
VCC
VCC
SDCLK
SData
Load
3
1
5
+
24
8031
SCDQ554XX
RST
XTAL
20 µf
.01 µf
VCC
VCC
VCC
SDCLK
SData
Load
3
1
5
+
24
8031
P0.0
P3.6
P3.0
SCDQ554XX
RST
XTAL
20 µf
.01 µf
VCC
VCC
VCC
SDCLK
SData
Load
3
1
5
+
24
68HC05
P0.0
SCLK
MOSI
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
Data Contents for the Display in a Horizontal Format “↑AB↓”
Step D7 D6 D5 D4 D3 D2 D1 D0 Function
A
B (optional)
11 0
11 1
00 0 0 0
10 B B B
CLEAR
BRIGHTNESS SELECT
1
2
3
4
5
6
10 1
00 0
00 1
01 0
01 1
10 0
00000
00100
01110
10101
00100
00100
DIGIT D0 SELECT
ROW 0 D0 (↑)
ROW 1 D0 (↑)
ROW 2 D0 (↑)
ROW 3 D0 (↑)
ROW 4 D0 (↑)
7
8
9
10
11
12
10 1
00 0
00 1
01 0
01 1
10 0
00001
00100
01010
11111
10001
10001
DIGIT D1 SELECT
ROW 0 D1 (A)
ROW 1 D1 (A)
ROW 2 D1 (A)
ROW 3 D1 (A)
ROW 4 D1 (A)
13
14
15
16
17
18
10 1
00 0
00 1
01 0
01 1
10 0
00010
11110
01001
01110
01001
11110
DIGIT D2 SELECT
ROW 0 D2 (B)
ROW 1 D2 (B)
ROW 2 D2 (B)
ROW 3 D2 (B)
ROW 4 D2 (B)
19
20
21
22
23
24
10 1
00 0
00 1
01 0
01 1
10 0
00011
00100
00100
10101
01110
00100
DIGIT D3 SELECT
ROW 0 D3 (↓)
ROW 1 D3 (↓)
ROW 2 D3 (↓)
ROW 3 D3 (↓)
ROW 4 D3 (↓)
Loading Data into the Display
Use following procedure to load data into the display:
1. Power up the display.
2. Step A: software clear the display.
3. Step B: Load the Control Word with the desired
brightness level.
4. Load the Digit Address into the display.
5. Load display row and column data for the selected digit.
6. Repeat steps 4 and 5 for all digits.
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
User Definable Character Set Examples*
Upper and lower case alphabets
Numerals and punctuation
*CAUTION: No more than 128 LEDs “on” at one time at 100% brightness.
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA SCDQ5541/5542/5543/5544/P/Q/R
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
User Definable Character Set Examples* (continued)
Scientific notations, ect.
Foreign characters
*CAUTION: No more than 128 LEDs “on” at one time at 100% brightness.
