HDSP-2533 Avago Technologies US Inc., HDSP-2533 Datasheet - Page 9

LED DISPLAY 5X7 8CHAR 5MM GREEN

HDSP-2533

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

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
Display Internal Block Diagram
Figure 1 shows the internal block­ diagram of the HDSP-
253X display. The CMOS IC consists of an 8 byte Character
RAM, an 8 bit Flash RAM, a 128 character ASCII decoder, a
16 character UDC RAM, a UDC Address Register, a Control
Character Ram
Figure 2 shows the logic levels needed to access the HDSP-
253X Character RAM. During a normal access the CE = “0”
and either RD = “0” or WR = “0”. However, erroneous data
may be written into the Character RAM if the Address lines
are unstable when CE = “0” regardless of the logic levels of
the RD or WR lines. Address lines A
the location in the Character RAM. Two types of data can
be stored in each Character RAM location: an ASCII code
or a UDC RAM address. Data bit D
ate between the ASCII character and a UDC RAM address.
D
UDC RAM. D
are used to input a UDC address.
9
7
Character RAM
Flash RAM
User-Defined Character RAM
(UDC RAM)
User-Defined Character
Address Register
(UDC Address Register)
Control Word Register
= 0 enables the ASCII decoder and D
0
-D
6
are used to input ASCII data and D
0
7
-A
is used to differenti-
2
are used to select
7
This RAM stores either ASCII character data or a UDC RAM address.
This is a 1 x 8 RAM which stores Flash data.
This RAM stores the dot pattern for custom characters.
This register is used to provide the address to the UDC RAM when
the user is writing or reading a custom character.
This register allows the user to adjust the display brightness, flash
individual characters, blink­, self test or clear the display.
= 1 enables the
0
-D
3
Word Register and the refresh circuitry necessary to syn-
chronize the decoding and driving of eight 5 x 7 dot
matrix characters. The major user accessible portions of
the display are listed below:
CONTROL SIGNALS
CHARACTER RAM ADDRESS
CHARACTER RAM DATA FORMAT
DISPLAY
0 = LOGIC 0; 1 = LOGIC 1; X = DO NOT CARE
Figure 2. Logic levels to access the character RAM.
DIG
RST
000
D
FL
1
1
0
1
7
SYMBOL IS ACCESSED IN LOCATION
SPECIFIED BY THE CHARACTER ADDRESS ABOVE
0
DIG
001
CE
A
D
0
1
X
4
6
1
DIG
WR
010
A
D
0
0
1
1
1
X
3
5
2
128 ASCII CODE
DIG
RD
011
A
D
0
1
0
1
X
2
4
3
CHARACTER
ADDRESS
UNDEFINED
WRITE TO DISPLAY
READ FROM DISPLAY
UNDEFINED
DIG
A
100
D
1
3
4
DIG
A
101
D
0
UDC CODE
2
5
000 = LEFT MOST
111 = RIGHT MOST
DIG
110
D
1
6
DIG
111
D
0
7

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