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參數(shù)資料
| 型號： | LC78621E |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| 中文描述： | 光碟機(jī)的DSP（用于光盤播放器的8位數(shù)字信號處理器） |
| 文件頁數(shù)： | 13/34頁 |
| 文件大?。?/td> | 417K |
| 代理商： | LC78621E |
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Note: CLV servo control commands can set the TOFF pin low only in CLV mode. That pin will be at the high level
at all other times. Control of the TOFF pin by microprocessor command is only valid in CLV mode.
CLV mode
In CLV mode the LC78621E detects the disk speed from the HF signal and provides proper linear speed using
several different control schemes by switching the DSP internal modes. The PWM reference period corresponds to
a frequency of 7.35 kHz. The V/P pin outputs a high level during rough servo and a low level during phase control.
Rough servo gain switching
For 8 cm disks, the rough servo mode CLV control gain can be set about 8.5 dB lower than the gain used for 12 cm
disks.
Phase control gain switching
The phase control gain can be changed by changing the divisor used by the dividers in the stage immediately
preceding the phase comparator.
No. 5223-13/34
LC78621E
Internal mode
CLV
+
CLV
–
V/P
Rough servo (velocity too low)
High
Low
High
Rough servo (velocity too high)
Low
High
High
Phase control (PCK locked)
PWM
PWM
Low
MSB
LSB
Command
RES = low
1 0 1 1 0 0 0 1
CLV PHASE COMPARATOR DIVISOR: 1/2
1 0 1 1 0 0 1 0
CLV PHASE COMPARATOR DIVISOR: 1/4
1 0 1 1 0 0 1 1
CLV PHASE COMPARATOR DIVISOR: 1/8
1 0 1 1 0 0 0 0
NO CLV PHASE COMPARATOR DIVISOR USED
G
G
MSB
LSB
Command
RES = low
1 0 1 0 1 0 0 0
DISC 8 SET
1 0 1 0 1 0 0 1
DISC 12 SET
G
G
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC78622E | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| LC78622NE | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| LC78624E | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| LC78625E | SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs |
| LC78625 | SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC78622E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78622NE | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78624E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78625 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78625E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
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