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參數資料
| 型號： | SCF5742 |
| 元件分類： | 顯示用LED |
| 英文描述： | 5X7 DOT MATRIX DISPLAY, SUPER RED, 6.86 mm |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-22 |
| 文件頁數： | 14/15頁 |
| 文件大小： | 683K |
| 代理商： | SCF5742 |
SCF5740, SCF5742, SCF5744
2006-01-23
8
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 eight
8 bit words. The first word encodes the display character location
and the succeeding seven bytes are row data. The row data repre-
sents the status (On, Off) of individual column LEDs. Figure Load-
ing Serial Character Data c“ (page 8) shows that each 8 bit word is
formatted to represent Character Address, or Column 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 256 bits of data are required to load all four characters
into the display.
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 140 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.
Loading Serial Character Data
Character “D”
Op code
D7
D6 D5
Column Data
D4
D3
D2
D1
D0
C0
C1
C2
C3
C4
Hex
Row 0
00
0
11
1
0
1E
Row 1
00
0
10
0
1
11
Row 2
00
0
10
0
1
11
Row 3
00
0
10
0
1
11
Row 4
00
0
10
0
1
11
Row 5
00
0
10
0
1
11
Row 6
00
0
11
1
0
1E
Character 0
Character 1
Character 2
Character 3
352 Clock Cycles, 70.4
s
Example: Serial Clock = 5.0 MHz, Clock Period = 200 ns
Time between LOADS
LOAD
Clock
Period
t 0
D0
D1
D2
D3
D4
D5
D6
D7
11 Clock Cycles, 2.2
s
Time
Between
Loads
600 ns(min)
OPCODE
Character Address
OPCODE
Column Data
D0
D
D1
D
D2
D
D3
D
D4
D
11 Clock Cycles, 2.2
s
Character 0
Address
Row 0 Column
Data
88 Clock Cycles, 17.6
s
Row 1 Column
Data
Row 2 Column
Data
Row 3 Column
Data
Row 4 Column
Data
D0
0
D1
0
D2
0
D3
0
D4
0
D5
1
D6
0
D7
1
a.
b.
c.
d.
Row 5 Column
Data
Row 6 Column
Data
D5
0
D6
0
D7
0
Time
Between
Loads
600 ns(min)
Serial
Clock
DATA
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相關代理商/技術參數 |
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| SCF5744 | 功能描述:LED 顯示器和配件 5x7 Hi-Eff Green 0.27" 4-CHARACTER RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數位數量: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 |
| SCF62160 | 制造商:CELDUC 制造商全稱:celduc-relais 功能描述:Power Solid State Relay |
| SCF-6C22-01-72 | 制造商:CORNING CABLE SYSTEMS 功能描述:6" dia., 22" length - 72 Fiber Canister Closure |
| SCF-6C28-01-144 | 制造商:CORNING CABLE SYSTEMS 功能描述:SPLICE CLOSURE 144 FIBER WITH TRAYS FOR HEAT SHRINK FUSION NO SPECIAL TOOLS |
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