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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： | 9/11頁 |
| 文件大小： | 265K |
| 代理商： | LC7458B-04 |
LC7458B-04
No.4978–7/11
Type 1 : External Key Control
Changed microcontroller parameters :
1. Hardware
None
2. Software
None
If pin 50 (DISP ON/OFF) is tied to GND, then 4-key control is also possible.
Note that pin 51 (PARA/SERI) is used pull-up.
Changed microcontroller parameters :
1. Hardware
5 output pins required
2. Software
Parallel signal generation
Note that pin 51 (PARA/SERI) is used pull-up.
Changed microcontroller parameters :
1. Hardware
1 output pin required
2. Software
PWN control signal generation
Note that pin 51 (PARA/SERI) and pin 52 are connected to GND.
Type 2 : 5 Parallel input Control
Type 3 : Pulse Width Signal (PWM)
Parallel Input Control
DEC ON/OFF (pin 45)
CH1/CH2 (pin 48)
Caption system decoder function ON/OFF switching
Caption channel switching
High : Caption OFF
High : Channel 1
Low : Caption ON
Low : Channel 2
CAP/TEXT (pin 46)
DISP ON/OFF (pin 50)
Caption/text switching
Caption display ON/OFF switching
High : Caption
High : Caption display OFF
Low : Text
Low : Caption display ON
F1/F2 (pin 47)
Each switch should be lock-type with a chattering rejection
Caption field switching
time of 60ms
High : Field 1
Low : Field 2
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