HDSP-2533 Avago Technologies US Inc., HDSP-2533 Datasheet - Page 11

• Manufacturer Part Number: HDSP-2533
• Description: LED DISPLAY 5X7 8CHAR 5MM GREEN
• Manufacturer: Avago Technologies US Inc.
• Series: HDSP-253xr

Specifications of HDSP-2533

• Display Type: Alphanumeric
• Common Pin: *
• Package / Case: 28-DIP
• Color: Green
• Size / Dimension: 1.69" x .45" (42.9mm x 11.4mm)
• Number Of Digits/alpha: 8
• Digit/alpha Size: 0.20" (5mm)
• Number Of Digits: 8
• Character Size: 2.54 mm x 4.57 mm
• Illumination Color: Green
• Wavelength: 574 nm
• Operating Voltage: 5 V
• Operating Current: 370 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 7.5 ucd
• Viewing Area (w X H): 40.06 mm x 4.57 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-1169-5

Control Word Register
Figure 6 shows how to access the Control Word Register.
This is an eight bit register which performs five functions.
They are Brightness control, Flash RAM control, Blink­ing,
Self Test and Clear. Each function is independent of the
others. However, all bits are updated during each Control
Word write cycle.
Brightness (Bits 0-2)
Bits 0-2 of the Control Word adjust the brightness of the
display. Bits 0-2 are interpreted as a three bit binary code
with code (000) corresponding to maximum brightness
and code (111) corresponding to a blank­ed display. In
addition to varying the display brightness, bits 0-2 also
vary the average value of I
any brightness level by multiplying the percent bright-
ness level by the value of I
These values of I
Flash Function (Bit 3)
Bit 3 determines whether the flashing character attribute
is on or off. When bit 3 is a “1, ” the output of the Flash RAM
is check­ed. If the content of a location in the Flash RAM is
a “1, ” the associated digit will flash at approximately 2 Hz.
For an external clock­, the blink­ rate can be calculated by
dividing the clock­ frequency by 28,672. If the flash enable
bit of the Control Word is a “0, ” the content of the Flash
RAM is ignored. To use this function with multiple display
systems see the Reset section.
Blink Function (Bit 4)
Bit 4 of the Control Word is used to synchronize blink­ing of
all eight digits of the display. When this bit is a “1” all eight
digits of the display will blink­ at approximately 2 Hz. The
actual rate is dependent on the clock­ frequency. For an
external clock­, the blink­ rate can be calculated by dividing
the clock­ frequency by 28,672. This function will override
the Flash function when it is active. To use this function
with multiple display systems see the Reset section.
Table 2. Current Requirements at Different Brightness Levels for All Colors Except AlGaAs
Symbol
I
11
DD
(V)
DD
D
0
0
0
0
1
1
1
2
are shown in Table 2.
DD
DD
at the 100% brightness level.
. I
DD
D
0
0
1
1
0
0
1
can be calculated at
1
D
0
1
0
1
0
1
0
0
CONTROL SIGNALS
CONTROL WORD ADDRESS
Figure 6. Logic levels to access the control word register.
RST
FL
D
0 NORMAL OPERATION
1 CLEAR FLASH AND CHARACTER RAMS
CONTROL WORD DATA FORMAT
0 = LOGIC 0; 1 = LOGIC 1; X = DO NOT CARE
1
1
C
7
CE
A
D
0
1
0
1
S
4
6
%
Brightness
100
80
53
40
27
20
13
WR
X NORMAL OPERATION; X IS IGNORED
X START SELF TEST; RESULT GIVEN IN X
A
D
0
0
1
1
0
S
3
5
X = 0 FAILED X = 1 PASSED
RD
A
BL
D
0
1
0
1
X
0 DISABLE BLINKING
1 ENABLE BLINKING
2
4
UNDEFINED
WRITE TO DISPLAY
READ FROM DISPLAY
UNDEFINED
A
D
X
F
0 DISABLE FLASH
1 ENABLE FLASH
1
3
V
25°C Typ.
200
160
106
80
54
40
26
DD
A
D
B
X
0
0
0
0
1
1
1
1
0
2
= 5.0 V
D
B
0
0
1
1
0
0
1
1
1
D
B
0
1
0
1
0
1
0
1
0
100%
80%
53%
40%
27%
20%
13%
0%
Units
mA
mA
mA
mA
mA
mA
mA
BRIGHTNESS
CONTROL
LEVELS