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參數資料
| 型號： | LC7458B-04 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP52 |
| 封裝： | DIP-52 |
| 文件頁數： | 11/11頁 |
| 文件大小： | 265K |
| 代理商： | LC7458B-04 |
LC7458B-04
No.4978–9/11
Alarm Function
If the caption data on line 21H is the alarm ON code, then ALARM OUT (pin 6) goes high. This condition is maintained
until either an alarm OFF code is received or a decoder reset occurs.
OSD Display Start Positioning Function
After a reset, the levels on DISP ADJ0 to DISP ADJ5 (pins 36 to 38 and 42 to 44) at the next horizontal sync signal HS
rising edge determine the horizontal display start position out of a possible 64 positions.
The display start posision is given by
Start Position=[DISP ADJ5 to 0]
×2×TLC
where TLC is the LC oscillator period.
Extended Characters
Of the 64 EIA-608 Optional Extended Characters, the following 16 are supported.
1
l
e
n
a
h
c
a
t
a
D2
l
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n
a
h
c
a
t
a
Dl
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b
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Sn
o
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D:
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s
l
A
0
2
10
2
AA
1t
n
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c
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t
u
c
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A
‘
l
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Ce
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P
1
2
11
2
A
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2
12
2
A
1
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O
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3
2
13
2
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1
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U
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4
2
14
2
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5
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15
2
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16
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7
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17
2
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8
2
18
2
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9
2
19
2
A
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A
2
1A
2
A
1–
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B
2
1B
2
A
1
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b
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C
2
1C
2
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1
M
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D
2
1D
2
A
1
°
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2
1E
2
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¨
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