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參數(shù)資料
| 型號： | SM5905AF |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | compression and non compression type shock-proof memory controller |
| 中文描述： | 壓縮和非壓縮式防震內(nèi)存控制器 |
| 文件頁數(shù)： | 22/35頁 |
| 文件大?。?/td> | 200K |
| 代理商： | SM5905AF |
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NIPPON PRECISION CIRCUITS-22
SM5905AF
Shock-proof mode is the mode that realizes shock-
proof operation using DRAM. Shock-proof mode is
invoked by setting MSON=H in microcontroller
command 80H.
This mode comprises the following 3 sequences.
Shock-proof operation overview
- Encode sequence
1. Input data from a signal processor IC is stored in
internal buffers.
2. Encoder starts after a fixed number of data have
been received.
3. The encoder, after the most suitable predicting
filter type and quantization steps have been deter-
mined, performs ADPCM encoding and then writes
to DRAM.
- Decode sequence
1. Reads compressed data stored in external buffer
RAM at rate fs.
2. Decoder starts, using the predicting filter type
and quantization levels used when encoded.
3. Performs attenuation operation (including muting
operation)
4. Outputs the result.
- Compare-connect sequence
1. Encoding immediately stops when either external
buffer RAM overflows or when a CD read error
occurs due to shock vibrations.
2. Then, using microcontroller command 80H, the
compare-connect start command is executed and
compare-connect sequence starts.
3. Compares data re-read from the CD with the pro-
cessed final valid data stored in RAM (confirms its
correctness).
4. As soon as the comparison detects conforming
data, compare-connect sequence stops and
encode sequence re-starts, connecting the data
directly behind previous valid data.
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| SM5906AF | Shock-proof Memory Controller for Video CD Players |
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| SM5907AF | compression and non compression type shock-proof memory controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM5906AF | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:Shock-proof Memory Controller for Video CD Players |
| SM5907 | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:compression and non compression type shock-proof memory controller |
| SM5907AF | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:compression and non compression type shock-proof memory controller |
| SM5908 | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 1500W 5.0V Unidirect RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C |
| SM59128 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller |
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