SCDV5544 OSRAM Opto Semiconductors Inc, SCDV5544 Datasheet - Page 8

• Manufacturer Part Number: SCDV5544
• Description: DISPLAY 4CHAR .123" 5X5 HEG DIP
• Manufacturer: OSRAM Opto Semiconductors Inc
• Series: Intelligent Display®r

Specifications of SCDV5544

• Millicandela Rating: 6.4mcd
• Size / Dimension: 0.78" L x 0.40" W x 0.20" H (19.91mm x 10.16mm x 5.08mm)
• Color: Green
• Configuration: 5 x 5
• Number Of Digits: 4
• Character Size: 0.123 in
• Illumination Color: High Efficiency Green
• Wavelength: 568 nm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 6.4 mcd
• Viewing Area (w X H): 2.41 mm x 3.41 mm
• Display Type: 5 x 7 Dot Matrix
• Emitting Color: Hi-Eff. Green
• Digit Size (in): .123in
• Viewing Area Height (mm): 3.124mm
• Package Type: DIP
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Industrial
• Operating Temp Range: -40C to 85C
• Mounting: Through Hole
• Pin Count: 11
• Total Thickness (mm): 5.08mm
• Opto Display Type: Panel
• Pattern Type: Dot Matrix
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Forward (vf) Typ: -
• Internal Connection: -
• Lead Free Status / Rohs Status: Compliant
• Other names: Q68000A8894

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 „Loading
Serial Character Data a“ (page 8). Figure „Loading Serial Charac-
ter Data b“ (page 8) shows that each character consist 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 „Loading
Serial Character Data c“ (page 8) 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 „Loading Serial Character Data d“ (page 8) 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.
As indicated in Figure „Loading Serial Character Data a“ (page 8),
a total of 264 bits of data are required to load all eight characters
into the display.
Loading Serial Character Data
2006-01-23
c.
d.
a.
b.
Character 0
Character 0
D0
Address
0
Character Address
LOAD
Serial
Clock
DATA
D1
0
D2
Character 1
0
264 Clock Cycles, 52.8 µs
11 Clock Cycles, 2.2µs
SCDV5540, SCDV5541, SCDV5542, SCDV5543, SCDV5544
D3
0
Row 0 Column
t 0
D4
Data
0
Example: Serial Clock = 5MHz, Clock Period = 200ns
66 Clock Cycles, 13.2µs
Clock
Period
D0
D5
1
Character 2
OPCODE
D6
0
D1
Row 1 Column
D7
0
Data
D2
Between
600ns(min)
Character 3
Time
Loads
D3
8
Row 2 Column
The Character Address Register bits, D4–D0 (Table „Load Charac-
ter Address“ (page 9)) and Row Address Register bits, D7–D5
(Table „Load Column Data“ (page 9)) direct the Column Data bits,
D4–D0 (Table „Load Column Data“ (page 9)) to specific RAM loca-
tion. Table „Character ’D’“ (page 8) shows the Row Address for the
example character “D.” Column data is written and read asynchro-
nously 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 Figures
„Row and Column Location“ (page 9) and „Row Strobing“
(page 10). The character strobe rate is determined by the internal
or user supplied external MUX Clock and the IC’s ÷320 counter.
Character “D”
Row 0
Row 1
Row 2
Row 3
Row 4
D0
C4
Data
D4
11 Clock Cycles, 2.2µs
D1
C3
Column Data
D2
C2
D5
Op code
D7
0
0
0
0
1
D3
C1
Row 3 Column
D6 D5
0
0
1
1
0
D6
Data
D4
C0
0
1
0
1
0
D5
OPCODE
D7
D6
Column Data
D4
C0
1
1
1
1
1
Row 4 Column
Time between LOADS
D7
D3
C1
Data
1
0
0
0
1
Between
600ns(min)
Time
Loads
D2
C2
1
0
0
0
1
D1
C3
1
0
0
0
1
D0
C4
0
1
1
1
0
Hex
1E
31
51
71
9E