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參數(shù)資料
| 型號： | LC78626KE |
| 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> | 387K |
| 代理商： | LC78626KE |
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The CLV Servo Circuit
Pin 20: CLV+, Pin 21: CLV-, Pin 22: V/P
CLV
+
is the signal for accelerating the disk in the forward direction, while CLV
–
is the signal for decelerating the disk.
Depending on the commands from the microcontroller, one of the following four modes is selected: Accelerate,
decelerate, CLV, or stop. The CLV
+
and CLV
–
outputs for each mode are as shown in the table below.
* The CLV servo control command is such that the TOFF pin is low only when the CLV mode is in effect, and it is high
otherwise. The TOFF pin control by the command is only active when the CLV mode is in effect.
CLV mode
In the CLV mode the rotation of the disk is detected from the HF signal, and a precise linear speed of rotation is
derived by exerting the respective forms on control when the internal modes of the DSP change. The PWM frequency
is 7.35 kHz. The V/P has a high output when the internal mode is the rough servo, and a low output when the internal
mode is phase control.
Switching the rough servo gain
When the internal mode is the rough servo, the CLV control gain for the 8 cm disk can be reduced by 8.5 dB from the
level for the 12 cm disk.
No. 5995-13/34
LC78626KE
Code
COMMAND
RES = low
$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
High
Low
Decelerate
Low
High
CLV
Pulse output
Pulse output
Stop
Low
Low
Internal mode
CLV
+
CLV
–
V/P
Rough servo (when the rotational speed is determined to be low)
High
Low
High
Rough servo (when the rotational speed is determined to be high)
Low
High
High
Phase control (when the PCK clock is running)
PWM
PWM
Low
Code
COMMAND
RES = low
$A8
DISC 8 cm Set
$A9
DISC 12 cm Set
G
G
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC78626 | 16-bit fixed point DSP with Flash |
| LC78626E | 16-bit fixed point DSP with Flash |
| LC78628 | 16-bit fixed point DSP with Flash |
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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 |
| LC78628E | 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 |
| 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 |
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