- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372115 > SAA7327 (NXP Semiconductors N.V.) Digital servo processor and Compact Disc decoder with integrated DAC for video CD (CD7 II)(應(yīng)用于視頻CD的帶綜合數(shù)模轉(zhuǎn)換器（DAC）的數(shù)字伺服處理器和光盤譯碼器) PDF資料下載
參數(shù)資料
| 型號(hào)： | SAA7327 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Digital servo processor and Compact Disc decoder with integrated DAC for video CD (CD7 II)(應(yīng)用于視頻CD的帶綜合數(shù)模轉(zhuǎn)換器（DAC）的數(shù)字伺服處理器和光盤譯碼器) |
| 中文描述： | 數(shù)字伺服處理器和光盤解碼器集成了用于視頻光盤（CD7抗原二）（應(yīng)用于視頻光碟的帶綜合數(shù)模轉(zhuǎn)換器（DAC）的的數(shù)字伺服處理器和光盤譯碼器援會(huì)） |
| 文件頁數(shù)： | 31/68頁 |
| 文件大?。?/td> | 284K |
| 代理商： | SAA7327 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁當(dāng)前第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
2000 Jun 26
31
Philips Semiconductors
Product specification
Digital servo processor and Compact Disc
decoder with integrated DAC for video CD (CD7 II)
SAA7327
7.14.7
O
FF
-
TRACK DETECTION
During active radial tracking, off-track detection has been
realised by continuously monitoring the off-track counter
value. The off-track flag becomes valid whenever the
off-track counter value is not equal to zero. Depending on
the type of extended S-curve, the off-track counter is reset
after 0.75 extend or at the original track in the 2.25 track
extend mode.
7.14.8
H
IGH
-
LEVEL FEATURES
7.14.8.1
Interrupt mechanism and STATUS pin
The STATUS pin is an output which is active LOW, its
output is selected by decoder register 7 to be either the
decoder status bit (active LOW) selected by decoder
register 2 (only available in 4-wire bus mode) or the
interrupt signal generated by the servo part.
8 signals from the interrupt status register are selectable
from the servo part via the interrupt_mask parameter.
The interrupt is reset by sending the read high-level status
command. The 8 signals are as follows:
Focus lost: dropout of longer than 3 ms
Subcode ready
Subcode absolute seconds changed
Subcode discontinuity detected: new subcode time
before previous subcode time, or more than 10 frames
later than previous subcode time
Radial error: during radial on-track, no new subcode
frame occurs within time defined by playwatchtime
parameter; during radial jump, less than 4 tracks have
been crossed during time defined by jumpwatchtime
parameter
Autosequencer state change
Autosequencer error
Subcode interface blocked: the internal decoder
interface is being used.
ItshouldbenotedthatiftheSTATUSpinoutputisselected
via decoder register 2 and either the microcontroller writes
a different value to decoder register 2 or the decoder
interface is enabled then the STATUS output will change.
7.14.8.2
Decoder interface
The decoder interface allows decoder registers 0 to F to
be programmed and subcode Q-channel data to be read
via servo commands. The interface is enabled/disabled by
the preset latch command (and the xtra_preset
parameter).
7.14.8.3
Automatic error handling
Three Watchdogs are present:
Focus: detects focus dropout of longer than 3 ms, sets
focus lost interrupt, switches off radial and sledge
servos, disables drive to disc motor
Radial play: started when radial servo is on-track mode
and a first subcode frame is found; detects when
maximum time between two subcode frames exceeds
time set by playwatchtime parameter; then sets radial
error interrupt, switches radial and sledge servos off,
puts disc motor in jump mode
Radial jump: active when radial servo is in long jump or
short jump modes; detects when the off-track counter
value decreases by less than 4 tracks between two
readings (time interval set by jumpwatchtime
parameter); then sets radial jump error, switches radial
and sledge servos off to cancel jump.
The focus Watchdog is always active, the radial
Watchdogs are selectable via the radcontrol parameter.
7.14.8.4
Automatic sequencers and timer interrupts
Two automatic sequencers are implemented (and must be
initialized after power-on):
Autostart sequencer: controls the start-up of focus,
radial and motor
Autostop sequencer: brakes the disc and shuts down
servos.
When the automatic sequencers are not used it is possible
to generate timer interrupts, defined by the
time_parameter coefficient.
7.14.8.5
High-level status
Thereadhigh-levelstatus commandcanbeused toobtain
the interrupt, decoder, autosequencer status registers and
the motor start time. Use of the read high-level status
command clears the interrupt status register, and
re-enables the subcode read via a servo command.
7.14.9
D
RIVER INTERFACE
The control signals (pins RA, FO and SL) for the
mechanism actuators are pulse density modulated.
The modulating frequency can be set to either
1.0584 MHz (DSD mode) or 2.1168 MHz; controlled via
the xtra_preset parameter. An analog representation of
the output signals can be achieved by connecting a
1st-order low-pass filter to the outputs.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7335GP | DSP for CD and DVD-ROM systems |
| SAA7335 | DSP for CD and DVD-ROM systems(在CD和DVD-ROM應(yīng)用中的DSP) |
| SAA7341 | COMS Digital decoding IC for Compact Disc |
| SAA7341GP | COMS Digital decoding IC for Compact Disc |
| SAA7345 | Bitstream conversion ADC for digital audio systems |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7327H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder with integrated DAC for video CD CD7 II |
| SAA7327H/T/M2B,557 | 功能描述:視頻 IC COMPACT DISC SYSTEMS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SAA7327HBG | 功能描述:視頻 IC COMPACT DISC SYSTEMS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SAA7335 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DSP for CD and DVD-ROM systems |
| SAA7335GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DSP for CD and DVD-ROM systems |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。