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參數(shù)資料
| 型號： | LC78625 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs |
| 中文描述： | SigmaDSP的28-/56-Bit音頻處理器雙ADC和4個(gè)DAC |
| 文件頁數(shù)： | 14/35頁 |
| 文件大?。?/td> | 440K |
| 代理商： | LC78625 |
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No. 5502-14/35
LC78625E
7. CLV servo circuit; Pin 13: CLV+, pin 14: CLV–, pin 15: V/P
The CLV+pin provides the signal that accelerates the disk in the forward direction and the CLV–pin provides the
signal that decelerates the disk. Commands from the control microprocessor select one of the four modes accelerate,
decelerate, CLV and stop. The table below lists the CLV+and CLV–outputs in each of these modes.
Code
COMMAND
RES = L
$04
DISC MOTOR START (accelerate)
$05
DISC MOTOR CLV (CLV)
$06
DISC MOTOR BRAKE (decelerate)
$07
DISC MOTOR STOP (stop)
G
G
Mode
CLV+
CLV–
Accelerate
H
L
Decelerate
L
H
CLV
Pulse output
Pulse output
Stop
L
L
Internal Mode
CLV+
CLV–
V/P
Rough servo (When determined to be under speed)
H
L
H
Rough servo (When determined to be over speed)
L
H
H
Phase control (PCK locked)
PWM
PWM
L
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
In CLV mode the LC78625E 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 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.
mode
Rough servo gain switching
For 8 cm discs, the rough servo mode CLV control gain can be set about 8.5 dB lower than the gain used for 12 cm
discs.
Code
COMMAND
RES = L
$A8
DISC 8 Set
$A9
DISC 12 Set
G
G
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC78626KE | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| LC78626 | 16-bit fixed point DSP with Flash |
| LC78626E | 16-bit fixed point DSP with Flash |
| LC78628 | 16-bit fixed point DSP with Flash |
| LC78628E | 16-bit fixed point DSP with Flash |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC78625E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78626 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DSP for Compact Disk Players |
| LC78626E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DSP for Compact Disk Players |
| LC78626KE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CD-Player Processor/Controller |
| LC78628 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP with Built-in HDCD Decoder |
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