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参数资料
| 型号： | LC7458B-04 |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP52 |
| 封装： | DIP-52 |
| 文件页数： | 8/11页 |
| 文件大小： | 265K |
| 代理商： | LC7458B-04 |
LC7458B-04
No.4978–6/11
Figure 4. Reset circuit
Figure 5. Pulse input timing conditions 1
Figure 7. Recommended interface circuit
Figure 6. Pulse input timing conditions 2
Mode Control
The LC7458B-04 allows, using a simple interface, a CCS function to be added to any of the existing television systems.
The degree of freedom of using microcontroller input/output pins and different program changes mean that any one of
three possible interfaces can be selected to best match design requirements. The LC7458B-04 interface methods can
broadly be classified into two categories–direct control by external keys and indirect control using signals from a
microcontroller.
LC7458B-04 control method
Direct
External key
TYPE1
Indirect
Parallel signal
5-parallel input control
TYPE2
Serial signal
Pulse width signal control
TYPE3
The control method, parallel signal control (types 1 and 2) or pulse width signal (PWM) control (type 3), is selected by
the level on pin 51 when power is applied.
High : Parallel signal control (types 1 and 2)
Low : Pulse width signal (PWM) control (type 3)
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