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參數(shù)資料
| 型號： | CXD3009Q |
| 廠商： | Sony Corporation |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | CD Digital Signal Processor(CD數(shù)字信號處理器) |
| 中文描述： | CD數(shù)字信號處理器（光盤數(shù)字信號處理器） |
| 文件頁數(shù)： | 39/64頁 |
| 文件大?。?/td> | 477K |
| 代理商： | CXD3009Q |
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CXD3009Q
3. Description of Modes
This LSI has three basic operating modes using a combination of spindle control and the PLL. The operations
for each mode are described below.
3-1. CLV-N Mode
This mode is compatible with the CXD2507AQ, and operation is the same as for the conventional control.
The PLL capture range is ±150kHz.
3-2. CLV-W Mode
This is the wide capture range mode. This mode allows the PLL to follow the rotational velocity of the disc.
This rotational following control has two types: using the built-in VCO2 or providing an external VCO. The
spindle is the same CLV servo as for the conventional series. Operation using the built-in VCO2 is described
below. (When using an external VCO, input the signal from the VPCO pin to the low-pass filter, use the
output from the low-pass filter as the control voltage for the external VCO, and input the oscillation output
from the VCO to the VCKI pin.)
While starting to rotate a disc and/or speeding up to the lock range from the condition where the disc is
stopped, CAV-W mode should be used. Specifically, first send $E6650 to set CAV-W mode and kick the
disc, then send $E60C0 to set CLV-W mode if ALOCK is high, which can be read out serially from the SQSO
pin. CLV-W mode can be used while ALOCK is high. The microcomputer monitors the serial data output, and
must return the operation to the speed adjusting state (CAV-W mode) when ALOCK becomes low. The
control flow according to the microcomputer software is shown in Fig. 3-2.
In CLV-W mode (normal), low power consumption is achieved by setting LPWR to high. Control was formerly
performed by applying acceleration and deceleration pulses to the spindle motor. However, when LPWR is
set to high, deceleration pulses are not output, thereby achieving low power consumption mode.
Note)
The capture range for CLV-W mode has theoretically the range up to the signal processing limit.
3-3. CAV-W Mode
This is CAV mode. In this mode, the external clock is fixed and it is possible to control the spindle to the
desired rotational velocity. The rotational velocity is determined by the VP0 to 7 setting values or the external
PWM. When controlling the spindle with VP0 to 7, setting CAV-W mode with the $E6650 command and
controlling VP0 to 7 with the $DX commands allows the rotational velocity to be varied from low-speed to
double-speed. (See the $DX commands.) Also, when controlling the spindle with the external PWM, the
PWMI pin is binary input which becomes KICK during high intervals and BRAKE during low intervals.
The microcomputer can know the rotational velocity using V16M. The reference for the velocity
measurement is a signal of 132.2kHz obtained by dividing the crystal (384Fs) by 128. The velocity is
obtained by counting V16M/2 pulses while the reference is high, and the result is output from the new CPU
interface as 8 bits (VF0 to 7). These measurement results are 31 when the disc is rotating at normal speed
or 63 when it is rotating at double speed. These values match those of the 256-n for control with VP0 to 7.
In CAV-W mode, the spindle is set to the desired rotational velocity and the operation speed for the entire
system follows this rotational velocity. Therefore, the cycles for the Fs system clock, PCM data and all other
output signals from this LSI change according to the rotational velocity of the disc (excluding DATO, CLKO
and XLTO).
Note)
The capture range for this mode is theoretically up to the signal processing limit.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CXD3011R-1 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD3017Q | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD3018Q/R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CD Digital Signal Processor with Built-in DigitalServo and DAC |
| CXD3021 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD3021R | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
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