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參數(shù)資料
| 型號： | CXD2586R-1 |
| 廠商： | Sony Corporation |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | CD Digital Signal Processor with Built-in Digital Servo and DAC |
| 中文描述： | CD數(shù)字信號處理器，具有內(nèi)置數(shù)字伺服和DAC |
| 文件頁數(shù)： | 64/127頁 |
| 文件大小： | 1694K |
| 代理商： | CXD2586R-1 |
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– 64 –
CXD2586R/-1
§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 CXD2500 series, and operation is the same (however, variable pitch cannot
be used). The PLL capture range is ±150kHz.
§3-2. CLV-W Mode
This is the wide capture range mode. This mode allows 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 CXD2500 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 from the VCO to the VCKI pin.)
While starting to rotate a disc and/or speeding up to the lock range from the condition that a disc stops, CAV-W
mode should be used. Concretely saying, firstly send $E665X to set CAV-W mode and kick a disc, secondly
send $E60CX to set CLV-W mode if ALOCK is high, which can be read serially from SQSO pin. CLV-W mode
can be used while ALOCK is high. The microcomputer monitors the serial data output, and must return to
adjust speed operation (CAV-W mode) when ALOCK becomes low. The control flow according to the
microcomputer software in CLV-W mode 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.
CLV-W mode supports control only by the ternary output of the MDP pin. Therefore, when using CLV-W mode,
set DCLV PWM MD to low.
Note)
The capture range for this mode is theoretically up to the signal processing limit.
§3-3. CAV-W Mode
This is the CAV mode. In this mode, it is possible to control spindle to variable rotational velocity, the external
crystal is fixed though. 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 the CAV-W mode with $E665X command and
controlling VP0 to 7 with the $DX commands allows the rotational velocity to be varied from low speed to
sextuple-speed. (See $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. And the reference for the velocity
measurement is a signal of 132.2kHz obtained by 1/128 of MCLK (384Fs). 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 (VP0
to 7). These measurement results are 31 when the disc is rotating at normal speed or 127 when it is rotating at
quadruple speed. These values match those of the 256-n for control with VP0 to 7. (See Table 2-5 and Fig. 2-
6.)
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.
Note)
The capture range for this mode is theoretically up to the signal processing limit.
Note)
Set FLFC to 1 for this mode.
相關(guān)PDF資料 |
PDF描述 |
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| CXD2587 | RESISTOR,MIL-PRF-39007/9 |
| CXD2587Q | CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD2588Q | RESISTOR,MIL-PRF-39007/9 |
| CXD2588R | CD Digital Signal Processor with Built-in Digital Servo and DAC |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CXD2587 | 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 |
| CXD2587Q | 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 |
| CXD2588Q | 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 |
| CXD2588Q/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 |
| CXD2588R | 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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