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參數(shù)資料
| 型號： | HDSP-2500 |
| 英文描述： | Eight Character 5 mm and 7 mm Smart Alphanumeric Displays |
| 中文描述： | 八字5毫米和7毫米智能字母數(shù)字顯示器 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 406K |
| 代理商： | HDSP-2500 |
12
UDC RAM and UDC Address
Register
Figure 3 shows the logic levels
needed to access the UDC RAM
and the UDC Address Register.
The UDC Address Register is
eight bits wide. The lower four
bits (D
0-D3) are used to select one
of the 16 UDC locations. The
upper four bits (D
4-D7) are not
used. Once the UDC address has
been stored in the UDC Address
Register, the UDC RAM can be
accessed.
To completely specify a 5 x 7
character, eight write cycles are
required. One cycle is used to
store the UDC RAM address in the
UDC Address Register and seven
cycles are used to store dot data
in the UDC RAM. Data is entered
by rows and one cycle is needed
to access each row. Figure 4
shows the organization of a UDC
character assuming the symbol to
be stored is an “F.” A
0-A2 are used
to select the row to be accessed
and D
0-D4 are used to transmit
the row dot data. The upper three
bits (D
5-D7) are ignored. D0 (least
significant bit) corresponds to the
right most column of the 5 x 7
matrix and D
4 (most significant
bit) corresponds to the left most
column of the 5 x 7 matrix.
Flash RAM
Figure 5 shows the logic levels
needed to access the Flash RAM.
The Flash RAM has one bit
associated with each location of
the Character RAM. The Flash
input is used to select the Flash
RAM while address lines A
3-A4 are
ignored. Address lines A
0-A2 are
used to select the location in the
Flash RAM to store the attribute.
D
0 is used to store or remove the
flash attribute. D
0 = “1” stores
the attribute and D
0 = “0”
removes the attribute.
When the attribute is enabled
through bit 3 of the Control Word
and a “1” is stored in the Flash
RAM, the corresponding
character will flash at approxi-
mately 2 Hz. The actual rate is
dependent on the clock frequency.
For an external clock the flash
rate can be calculated by dividing
the clock frequency by 28,672.
CCCCC
OOOOO
LLLLL
12345
UDC
HEX
D4
D3
D2
D1
D0
CHARACTER
CODE
11111
ROW 1
*
1F
10000
ROW 2
*
10
10000
ROW 3
*
10
11110
ROW 4
*
1D
10000
ROW 5
*
10
10000
ROW 6
*
10
10000
ROW 7
*
10
IGNORED
0 = LOGIC 0; 1 = LOGIC 1; * = ILLUMINATED LED.
Figure 4. Data to Load ""F'' into the UDC RAM.
Figure 3. Logic Levels to Access a UDC Character.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HDSP-2501 | Dual Differential Drivers And Receivers 16-PDIP 0 to 70 |
| HDSP-5553-EB000 | CAP 820PF 100V 0.1 NP0(C0G) RAD-.10IN .200X.260 CONF T&R |
| HDSP-5553-EC000 | Low Current Seven Segment Displays |
| HDSP-5553-ED000 | Low Current Seven Segment Displays |
| HDSP-5553-EE000 | Low Current Seven Segment Displays |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HDSP-2501 | 功能描述:LED 顯示器和配件 Yellow 585nm 5x7 Smart Display RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| HDSP-2502 | 功能描述:LED 顯示器和配件 Red 626nm 5x7 Smart Display RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| HDSP2502 | 制造商:Avago Technologies 功能描述:LED DISPLAY ALPHANUMERIC |
| HDSP-2503 | 功能描述:LED 顯示器和配件 Green 574nm 5x7 Smart Display RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| HDSP2503 | 制造商:Avago Technologies 功能描述:LED DISPLAY ALPHANUMERIC |
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