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參數(shù)資料
| 型號(hào)： | SCF5744 |
| 廠商： | SIEMENS A G |
| 元件分類： | 顯示用LED |
| 英文描述： | 0.270” 4-Character, 5x7 Dot Matrix Serial Input Dot Addressable Intelligent Display |
| 中文描述： | 5X7 DOT MATRIX DISPLAY, HIGH EFFICIENCY GREEN, 6.86 mm |
| 封裝： | PLASTIC, DIP-22 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 93K |
| 代理商： | SCF5744 |
2–207
SCF5740/2/4
Table 4a. Display Brightness
Table 4b. Display Brightness
The SCF574X offers a unique Display Power Down feature
which reduces ICC to less than 50
μ
A. When EF
HEX
is loaded
(Table 5) the display is set to 0% brightness. When in the
Power Down mode data may still be written into the RAM. The
display is reactivated by loading a new brightness Level Con-
trol Word into the display.
Table 5. Power Down
Figure 8. Row and Column Locations for a Character “D”
Op code
D7 D6
Control Word
D5 D4 D3 D2 D1 D0
Hex
Operation
Level
1 1
1 0 0 0 0 0
E0
100%
1 1
1 0 0 0 0 1
E1
53%
1 1
1 0 0 0 1 0
E2
40%
1 1
1 0 0 0 1 1
E3
27%
1 1
1 0 0 1 0 0
E4
20%
1 1
1 0 0 1 0 1
E5
13%
1 1
1 0 0 1 1 0
E6
6.6%
1 1
1 0 0 1 1 1
E7
0.0%
Op code
D7 D6
Control Word
D5 D4 D3 D2 D1 D0
Hex
Operation
Level
1 1
1 0 1 0 0 0
E0
100%
1 1
1 0 1 0 0 1
E1
53%
1 1
1 0 1 0 1 0
E2
40%
1 1
1 0 1 0 1 1
E3
27%
1 1
1 0 1 1 0 0
E4
20%
1 1
1 0 1 1 0 1
E5
13%
1 1
1 0 1 1 1 0
E6
6.6%
1 1
1 0 1 1 1 1
E7
0.0%
Op code
D7 D6
Control Word
D5 D4 D3 D2 D1 D0
Hex
Operation Level
1 1
1 0 1 1 1 1 1
EF
0% brightness
off LED
on LED
Row 0
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Previously “on” LED
0 1 2 3 4
Columns
The user can activate four Control functions. These include:
LED Brightness Level, IC Power Down, Prescaler, or Display
Clear. OPCODEs and six bit words are used to initiate these
functions. The OPCODEs and Control Words for the Charac-
ter Address and Loading Column Data are shown in Tables 2
and 3 .
Table 2. Load Character Address
Table 3. Load Column Data
The user can select eight specific LED brightness levels,
Table 4. Depending on how D3 is selected either one (1) for
maximum peak current or zero (0) for 12.5% of maximum
peak current in the control word per Table 4a and 4b, the user
can select 16 specific LED brightness levels. These bright-
ness levels (in percentages of full brightness of the display)
depending on how the user selects D3 can be one (1) or zero
(0) are as follows: 100% (E0
HEX
or E8
HEX
), 53% (E1
HEX
or
E9
HEX
), 40% (E2
HEX
or EA
HEX
), 27% (E3
HEX
or EB
HEX
), 20%
(E4
HEX
or EC
HEX
), 13% (E5
HEX
or ED
HEX
), and 6.6% (E6
HEX
or EE
HEX
), 0.0% (E7
HEX
or EF
HEX
). The brightness levels are
controlled by changing the duty factor of the row strobe
pulse.
Op code
D7 D6 D5
Character
Address
D4 D3 D2 D1 D0
Hex
Operation Load
1 0 1
0 0 0 0 0
A0
Character 0
1 0 1
0 0 0 0 1
A1
Character 1
1 0 1
0 0 0 1 0
A2
Character 2
1 0 1
0 0 0 1 1
A3
Character 3
Op code
D7 D6 D5
Column Data
D4 D3 D2 D1 D0
Operation Load
0 0 0
C0 C1 C2 C3 C4
Row 0
0 0 0
C0 C1 C2 C3 C4
Row 1
0 0 0
C0 C1 C2 C3 C4
Row 2
0 0 0
C0 C1 C2 C3 C4
Row 3
0 0 0
C0 C1 C2 C3 C4
Row 4
0 0 0
C0 C1 C2 C3 C4
Row 5
0 0 0
C0 C1 C2 C3 C4
Row 6
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