HDSP-2179 Avago Technologies US Inc., HDSP-2179 Datasheet - Page 11

• Manufacturer Part Number: HDSP-2179
• Description: DISPLAY 5X7 8DIGIT .2" 32DIP ORN
• Manufacturer: Avago Technologies US Inc.
• Series: HDSP-2179r

Specifications of HDSP-2179

• Package / Case: 32-DIP
• Color: Orange
• Size / Dimension: 1.68" x 0.77" (42.59mm x 19.58mm)
• Display Type: Alphanumeric
• Number Of Digits/alpha: 8
• Digit/alpha Size: 0.20" (5mm)
• Character Format: Dot Matrix
• Character Size: 5mm
• Led Color: Orange
• Luminous Intensity: 7.5mcd
• No. Of Digits / Alpha: 8
• Display Area Width: 42.72mm
• Display Area Height: 9.91mm
• Number Of Digits: 8
• Illumination Color: Orange
• Wavelength: 602 nm
• Operating Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Common Pin: -
• Lead Free Status / Rohs Status: Details

Character RAM
Flash RAM
User-Defined Character RAM
(UDC RAM)
User-Defined Character
Address Register
(UDC Address Register)
Control Word Register
11
Display Internal Block Diagram
Character Ram
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.
Figure 2. Logic levels to access the character RAM.
CONTROL SIGNALS
CHARACTER RAM ADDRESS
CHARACTER RAM DATA FORMAT
DISPLAY
0 = LOGIC 0; 1 = LOGIC 1; X = DO NOT CARE
DIG
RST
000
D
FL
1
1
0
1
7
SYMBOL IS ACCESSED IN LOCATION
SPECIFIED BY THE CHARACTER ADDRESS ABOVE
0
DIG
CE
001
A
D
X
0
1
4
6
1
DIG
WR
010
A
D
X
0
0
1
1
1
3
5
2
128 ASCII CODE
DIG
RD
A
011
D
0
1
0
1
X
2
4
CHARACTER
3
ADDRESS
UNDEFINED
WRITE TO DISPLAY
READ FROM DISPLAY
UNDEFINED
DIG
100
A
D
1
3
4
DIG
A
101
D
UDC CODE
0
2
5
000 = LEFT MOST
111 = RIGHT MOST
DIG
110
D
1
6
DIG
111
D
0
7