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| For Audio Equipment MN662741RH Signal Processing LSI for CD Players Overview The MN662741RH is a CD signal processing LSI that, on a single chip, combines an optics servo 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. (Spindle motor servo) CLV digital servo (Audio circuits) Digital filter using 8-fold oversampling Built-in D/A converter (1-bit D/A converter) Built-in differential operational amplifier (2nd order low pass filter) (Other) Built-in playback pitch control function (13%) Operating voltage 4.0 to 5.5V 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) Built-in DSL and PLL Frame synchronization detection, holding, and insertion Subcode data processing Q data CRC check Built-in 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 Four-sample average, hold of previous values Soft muting Digital attenuation (256 levels) Software attenuation (256 levels) Audio data peak level detection function Auto cue detection function Digital audio interface (EIAJ format) Audio data serial interface for input and output Applications CD Players MN662741RH Block Diagram 51 AVSS2 50 AVDD2 79 LRCKIN/MSEL BCLKIN/SSEL 80 78 SRDATEIN/PSEL 70 66 67 13 62 56 55 68 69 CIRC ERROR CORRECTION 16K SRAM DEINTERLEAVE For Audio Equipment 8 TIMES OVER SAMPLING DIGITAL FILTER 75 PWM (R) - + DIGITAL DEEMPHASIS OUTR 1 BIT DAC LOGICS 73 PWM (L) - + OUTL IOSEL CLVS CRC BLKCK CLDCK SBCK SUBC DEMPH RESY FLAG6/RESY 74 AVSS1 72 AVDD1 65 FLAG 64 IPFLAG DIGITAL AUDIO INTERFACE 6 TX SUBCODE BUFFER CLV SERVO EFM DEMODULATION SYNC INTERPOLATION SUBCODE DEMODULATION 80 SSEL 14 SQCK 15 SUBQ PCK EFM PLLF DSLF IREF DRF ARF RSEL PSEL 53 52 48 47 45 46 44 76 78 24 23 ECM PC 9 MLD 7 MCLK 8 MDATA VCO SERVO CPU CK384/EFM 49 VCOF SMCK FCLK PMCK CSEL MSEL X2 X1 STAT 19 63 20 77 79 59 58 17 2 LRCK 3 SRDATA 1 BCLK 16 DMUTE 21 TRV 26 KICK 29 V 61 REF BYTCK/TRVSTOP 25 ECS 22 TVD 27 TRD 28 FOD 31 TBAL 30 FBAL 54 TOFS 41 TES 12 TLOCK 11 FLOCK 42 PLAY 40 LDON 43 WVEL 10 SENSE DSL*PLL INTERPOLATION SOFT MUTING DIGITAL ATTENUATION PEAK DETECT AUTO CUE VCO MICROCOMPUTER INTERFACE TIMING GENERATOR PITCH CONTROL A/D CONVERTER 60 57 4 5 18 71 32 FE 33 TE 34 RFENV INPUT PORT 37 35 39 SERVO TIMING GENERATOR 38 36 OFT TRCRS RFDET VDD VSS DVDD1 DVSS1 RST TEST VDET BDO OUTPUT PORT D/A CONVERTER For Audio Equipment Package Dimensions (Unit: mm) QFS080-P-1414 MN662741RH 16.20.2 14.00.2 60 61 41 40 0.825 14.00.2 80 21 1 0.65 20 16.20.2 1.10.1 2.00.2 0.3 -0.05 2.10.3 +0.10 0.15 SEATING PLANE 0.10.1 0.15 0.550.1 0 to 10 +0.10 -0.05 |
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