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參數(shù)資料
| 型號(hào)： | LC7455 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Closed Caption Signal Extraction IC |
| 中文描述： | 字幕信號(hào)提取集成電路 |
| 文件頁數(shù)： | 9/13頁 |
| 文件大?。?/td> | 232K |
| 代理商： | LC7455 |
Caption Data Transfer from the LC7455A/M to the Decoder IC (microcontroller): Method 2
(For applications that cannot provide an input port on the decoder IC (microcontroller) to detect LN21 falling edges.)
N
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In modes 1 and 2, since data is output to the output buffer once every frame (in the even field), the decoder IC (microcontroller) must perform a transfer control operation at least twice every frame (about 32 ms).
When the second control operation is performed in a given frame, the CPDT output for that second operation will be 16 bits of zeros. This allows the microprocessor to recognize that the data for the next frame has not yet been
transferred to the output buffer.
Notes: When CE remains low, the hardware will not transfer the data to the output buffer. Thus applications must restore CE from low to high after each data transfer to the decoder IC (microcontroller) operation has completed.
This transfer technique (method 2) cannot be used in modes 3 and 4.
Within a single frame (modes 1 and 2)
16 bits of data all
of which are zeros.
16 bits transfered
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC7455A | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Closed Caption Signal Extraction IC |
| LC7455M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Closed Caption Signal Extraction IC |
| LC7456A | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:U.S. Closed Caption Signal Extraction IC |
| LC7458B-04 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Closed-Caption Decoder LSI |
| LC7460 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
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