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參數(shù)資料
| 型號： | LC78628E |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | 16-bit fixed point DSP with Flash |
| 中文描述： | 具有閃存的 16 位定點(diǎn) DSP |
| 文件頁數(shù)： | 14/40頁 |
| 文件大?。?/td> | 241K |
| 代理商： | LC78628E |
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CLV mode
In CLV mode, the disc rotation is detected from the HF signal, and proper linear velocity rotation is achieved by
changing the DSP internal modes. The basic PWM period corresponds to a frequency of 7.35 kHz. The V/P pin outputs
a high level during rough servo operation and a low level during phase control.
No. 6329-14/40
LC78628E
Internal mode
CLV
+
CLV
–
V/P
Rough servo (low-speed rotation recognized)
H
L
H
Rough servo (high-speed rotation recognized)
L
H
H
Phase control (PCK locked)
PWM
PWM
L
Code
Command
RES = low
$A8
Disc 8 cm Set
$A9
Disc 12 cm Set
G
G
The CLV control gain in rough servo mode can be set 8.5 dB lower for 8 cm discs that for 12 cm discs.
Rough servo gain switching
Code
Command
RES = low
$B1
CLV phase comparator divided by 2
$B2
CLV phase comparator divided by 4
$B3
CLV phase comparator divided by 8
$B0
CLV No phase comparator division
G
G
The phase control gain can be modified by switching the divisor provided by the divider circuit in the front end of the phase comparator.
Phase control gain switching
13
CLV+
1/N
1/N
Phase
comparator
7.35 kHz
PCK/588
CLV–
14
A12809
CLV+
CLV+
CLV–
CLV–
Acceleration
Deceleration
High-impedance output
3-value output
2-value output
A12810
Code
Command
RES = low
$B4
CLV 3-value output
$B5
CLV 2-value output (earlier technique)
G
G
The CLV 3-value output command allows CLV control to be implemented using a single output pin. However, note that since the spindle gain is reduced by
6 dB, the servo side gain must be increased.
CLV 3-value output
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相關(guān)代理商/技術(shù)參數(shù) |
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| LC7863 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DIGITAL SIGNAL PROCESSOR FOR COMPACT DISC PLAYERS |
| LC78630 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP |
| LC78630E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP |
| LC78631 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP |
| LC78631E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP |
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