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PDF MN66271RA Data sheet ( Hoja de datos )
| Número de pieza | MN66271RA | |
| Descripción | Signal Processing LSI for Compact Disc Players | |
| Fabricantes | Panasonic | |
| Logotipo |  |
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For Audio Equipment
MN66271RA
Signal Processing LSI for Compact Disc Players
Overview
The MN66271RA is a CD signal processing LSI that,
on a single chip, combines optics servos for the CD player
(focus, tracking, and traverse servos), digital signal
processing (EFM demodulation and error correction),
digital servo processing for the spindle motor, digital
filter, and D/A converter, so thus covers all signal
processing functions from the head's RF amplifier onward.
Features
(Optics servo)
Focus, tracking, and traverse servos
Automatic adjustment functions for FO/TR gain,
FO/TR offset, and FO/TR balance
Built-in D/A converter for drive voltage output
Built-in dropout countermeasures
Anti-shock functions
Built-in track cross counter
Support for both linear motor and screw-based
traverse mechanisms
Support for 3- and 1-beam systems Digital Signal
Processing
(Spindle motor servo)
CLV digital servo
(Audio circuits)
Digital filter using 8 times oversampling
Built-in D/A converter (1-bit D/A converter)
Built-in differential operational amplifier (±PWM
output)
(Other)
Built-in playback pitch control function (±13%)
Operating voltage 4.5 to 5.5 V
Applications
CD Players
(Digital signal processing)
Built-in DSL and PLL
Frame synchronization detection, holding, and
insertion
Subcode data processing
Subcode Q data CRC check
Built-in subcode Q data register
CIRC error detection and correction
C1 decoder: duplex error correction
C2 decoder: triplex error correction
Built-in 16-K bits of RAM for use in de-
interleaving
Audio data interpolation
Averaging or retention of previous values
Soft muting
Digital attenuation (256 levels)
Software attenuation (256 levels)
Audio data peak level detection function
Automatic cuing detection function
Digital audio interface (EIAJ format)
Audio data serial interface
1 page  
For Audio Equipment
MN66271RA
Pin Descriptions (continued)
Pin No. Symbol
41 TES
I/O
O
Function Description
Tracking error shunt signal.
"H" level: shunt.
42
PLAY
O
Play signal output.
"H" level: play.
43
WVEL
O
Double-speed status signal output. "L" level: double-speed.
44 ARF I RF signal input
45 IREF I Reference current input pin
46 DRF I DSL bias pin
47 DSLF I/O DSL loop filter pin
48 PLLF I/O PLL loop filter pin
49 VCOF I/O VCO loop filter pin for pitch control
50 AVDD2 I Power supply for analog circuits (DSL, PLL, and D/A converter output)
51 AVSS2 I Ground for analog circuits (DSL, PLL, and D/A converter output)
52
EFM
O EFM signal output
53 PCK O PLL derived clock output with fPCK=4.3218 MHz
54
PDO
O Phase comparator output for EFM and PCK signals
55
SUBC
O
Subcode serial output data output
56 SBCK I Serial clock input for subcode serial output
57 VSS I Ground for oscillator circuit
58 X1 I Crystal oscillator circuit input pin. f=16.9344 MHz.
59 X2 O Crystal oscillator circuit output pin. f=16.9344 MHz.
60 VDD I
61 BYTCK O
Power supply for oscillator circuit
Byte clock signal output
62 CLDCK O
63
FCLK
O
64 IPFLAG O
Subcode frame clock signal output pin (fCLDCK=7.35 kHz)
Crystal frame clock signal output (fFCLK=7.35 kHz)
Interpolation flag signal output.
"H" level: interpolation.
65
FLAG
O
Flag signal output
66
CLVS
O
Spindle servo phase synchronization signal output. "H" level: CLV.
"L" level: rough servo.
67
CRC
O Subcode CRC check result output. "H" level: OK. "L" level: no good.
68 DEMPH O
De-emphasis detection signal output.
"H" level: ON.
69
RESY
O
Frame resynchronization signal.
"H" level: synchronized.
"L" level: out of sync.
70 RST2 I Reset pin for stopping operation of circuits past D/A converter
71 TEST I Test pin.
Keep this pin at "H" level.
72 AVDD1 I Power supply for analog circuits (common use for by left and right channel
audio outputs)
73
OUTL
O
Left channel audio output
74 AVSS1 I Ground for analog circuits (common use for left and right channel audio
outputs)
75
OUTR
O
Right channel audio output
76 RSEL I RF signal polarity selection pin. "H" level: bright level is "H.
"L" level: bright level is "L.
77 CSEL I Test pin.
Keep this pin at "L" level.
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MN66271RA.PDF ] | |
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