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Super
LC78648NEH | Conditional ❋ : Use of conditional products requires | |
development |
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| Product | consultation with a SANYO representative |
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| prior to the use of the device. |
Under
Overview
The LC78648NEH integrates, on a single chip, the RF signal processing, servo control, EFM signal processing, and audio signal processing required for audio CD playback.
This single IC can perform all the CD data signal processing required to convert the signal read from the disc to an analog audio signal. A basic CD player system can be implemented with just three ICs
(this IC, a microcontroller, and a driver IC) and a minimal number of external components.
Features
Compact Discc PlayerPlayer MP3MP3 DecoderDecoder
LC78684E4E | ProductProduct | :: UseUse ofof conditionalconditional productsproducts requiresrequires |
| ❋❋ | |
| ConditionalConditional | consultationconsultation withwith aa SANYOSANYO representativerepresentative |
| priorprior toto thethe useuse ofof thethe devicedevice.. |
Overview
The LC78684E integrates, on a single chip,
These
Features
■Playback functions
◆Playback speeds: 1 , 2 -
■RF processing block
◆RF system: AGC,
◆Error system: Variable balance TE signal playback, FE signal playback
◆Detection: Track count signal, jitter, defect (black and mirror) ◆Laser power control
◆DC offset voltage cancellation
■Servo control block
◆Implements all servo functions (tracking, focus, sled, and spindle) in digital ◆Automatic control function: Focus gain, focus bias, focus offset, tracking
gain, tracking offset, tracking balance ◆Mechanical shock detection ◆Interruption detection
■EFM processing block
◆Error detection and correction (C1: double, C2: double)
◆Jitter margin: ±4 frames ◆DOUT output
◆EFM signal sync detection, protection, and interpolation
■Audio processing block
◆Interpolation (4 sample interpolation)
◆Digital attenuator ◆Deemphasis filter
◆Fadeout function ◆Bilingual function
◆Supports external supply of the digital filter and D/A converter clock
■Supply voltage: 3.3 V
■ Package: QFP80 (14 14)
■MP3 (MPEG audio standard ISO/IEC
◆Decoding and output as a digital audio signal of MP3 data decoded by the
◆Supports the following sampling frequencies ◆MPEG1 (Fs = 32, 44.1, and 48 kHz) ◆MPEG2 (Fs = 16, 22.05, and 24 kHz) ◆MPEG2.5 (Fs = 8, 11.025, and 12 kHz)
◆Supports readout of the MPEG header information and ancillary information ◆Provides automatic muting on CRC errors using an MP3 CRC check function ◆MPEG data external serial input function supports memory card playback
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◆Support for
◆Supports up to 4 speed playback
◆In addition to data buffering also supports C2 error flag buffering ◆Can provide external serial output of the decoded
■CD-DA playback functions (anti-skip support)
❋:This product is subject to change without notice for improvement. When considering the use of this product, first refer to the latest SANYO "Semiconductor News" publication related to this device and
Block Diagram |
| finally refer to the latest specifications for the device. | ||||
PHLPF/RFMON | MONITOR |
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VREF | VREF |
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| FDO | |
LDD |
| D/A |
| D/A | TDO | |
APC |
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| SPDO | ||
LDS |
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LPF |
| AUTO |
| RAM | AVDD1 | |
RF | RF SIGNAL | ADJUST | SERVO | AVSS | ||
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AIN |
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| AVDD2 | |||
PROCESSOR | TRACK | PROCESSEROR | RUPTURE | |||
CIN |
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BIN |
| JUMP |
| DEFECR |
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DIN |
| CLA |
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| DEFECT | |
FEC | FOCUS ERROR |
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CAV |
| DRF | DRF | |||
| PROCESSOR |
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| CONTROL |
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◆Up to 180 seconds of
◆Provides compressed/uncompressed selection as well as a data through output function ◆VCEC (variable speed) function supports up to 4 speed playback
■Audio signal processing
◆Serial audio signal output using the LRCK, BCK, and DATA signals
(Output supports the I2S format, 16- or
◆Digital bass boost function (4 modes), attenuator function, and muting
■DRAM interface
◆Supports use of 1 to 64M bits of external memory (EDO, 2 CAS,
■Supply voltages ◆Internal: 1.8 V ◆I/O: 3.3 V
◆Analog system: 3.3 V
■ Package: QFP80 (14 14)
❋:This product is subject to change without notice for improvement. When considering the use of this product, first refer to the latest SANYO "Semiconductor News" publication related to this device and
EIN | TRACKING | VPB |
FIN | ||
TEC | ERROR |
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Block Diagram
finally refer to the latest specifications for the device.
TE | PROCESSOR |
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| CL |
TEIN |
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| CPU I/F | CE |
JITTC |
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| DI | |
JITTER/DETECT |
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| DO | |
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| WRQB |
SLCO | SLICE LEVEL |
| PORT | CONT1 to 6 |
EFMIN | CONTROL |
| OUT1 | |
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PDO1 |
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| FRAME SYNC |
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PDO2 |
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PLL |
| DETECT,PROTECT | FSEQ | |
PCKIST |
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VVDD |
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| INSERT |
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| EFM DECODE |
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VVSS |
| ERROR | FSX | |
XVDD | RAM |
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CORRECTION |
| EFLG | ||
XVSS |
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| C2F | |
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XIN | CLOCK |
| MONITOR SIGNAL | MONI 1 to 5 |
XOUT | INTERPOLATION | |||
F16MIN | GENERATOR | SELECTOR |
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F16MOUT |
| MUTE |
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ASLRCK | EXTERNAL | ATTENUATION | SUBCODE DECODE CRC & |
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ASDACK | TEXT |
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AUDIO IN |
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ASDFIN |
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RVDD |
| 8FS DIGITAL | AUDIO OUT | DOUT |
| FILTER | |||
RCHO | LPF | DEEMPHASIS |
| LRSY |
LRVSS |
| SERIAL | ||
LCHO |
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| DATACK | |
| 1bit DAC | OUT | ||
LVDD |
| DATA | ||
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RESB |
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| DVDD |
TEST |
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| DVDD |
IOMODE |
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| DVSS |
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| DVSS |
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| WEB OEB CASLB CASUB RASB | MADRS[12:0] | MDATA[15:0] | CL CE | CMDIN CMDOUT | INTB |
| System |
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CKIN |
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VPRFR | VCO |
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VCOC |
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VPDO | + |
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CKOUT | PLL |
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WOK |
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| STREQ | |
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| STCK | |||
CNTOK |
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| CDROM |
| STDAT | |
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OVF |
| Compressed, uncompressed |
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| Decoder |
| CRCF |
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LRSY |
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| MP3 |
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DATACK |
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| Decoder | FSYNC | ||
DATAIN |
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C2FIN |
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SFSY |
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PW |
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| M |
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SBSY |
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SBCK |
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| X |
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RESB |
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| ADLRCK |
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| Audio I/F | ||
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| ADBCK | ||
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| ADDATA |
| 17 Car Audio | 18 Car Audio |
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