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LC78648NEHLC78648NEH LC78684ELC78684E
RESB
SBCK
SBSY
PW
SFSY
C2FIN
DATAIN
DATACK
LRSY
VPDO
CKOUT
VCOC
VPRFR
CKIN
OVF
CNTOK
WOK
WEB
OEB
CASLB
CASUB
RASB
CL
CE
CMDIN
CMDOUT
INTB
MADRS[12:0]
MDATA[15:0]
STREQ
STCK
STDAT
CRCF
ADLRCK
ADBCK
ADDATA
FSYNC
Audio I/F
M
U
X
MP3
Decoder
Data-I/F
CDROM
Decoder
Anti-Shock
Compressed, uncompressed
DRAM-I/F
System
Clock-gen
VCO
+
PLL
CPU-I/F
PHLPF/RFMON
LPF
EXTERNAL
AUDIO IN
CLOCK
GENERATOR
PLL
JITTER/DETECT
SLICE LEVEL
CONTROL
TRACKING
ERROR
PROCESSOR
FOCUS ERROR
PROCESSOR
RF SIGNAL
PROCESSOR
APC
VREF
MONITOR
D/A
SERVO
PROCESSEROR
RAM
DRF
CPU I/F
PORT
MONITOR SIGNAL
SELECTOR
ERROR
CORRECTION
INTERPOLATION
MUTE
ATTENUATION
8FS DIGITAL
FILTER
DEEMPHASIS
AUDIO OUT
1bit DAC
SERIAL
OUT
SUBCODE DECODE CRC &
TEXT
FRAME SYNC
DETECT,PROTECT
INSERT
EFM DECODE
RUPTURE
DEFECR
D/A
AUTO
ADJUST
TRACK
JUMP
CLA
CAV
CONTROL
FDO
TDO
SPDO
SLDO
AVDD1
AVSS
AVDD2
DEFECT
DRF
VPB
CL
CE
DI
DO
WRQB
CONT1 to 6
OUT1
FSEQ
FSX
EFLG
C2F
MONI 1 to 5
DOUT
LRSY
DATACK
DATA
DVDD
DVDD
DVSS
DVSS
VREF
LDD
LDS
LPF
RF
AIN
CIN
BIN
DIN
FEC
EIN
FIN
TEC
TE
TEIN
JITTC
SLCO
EFMIN
PDO1
PDO2
PCKIST
VVDD
VVSS
XVDD
XVSS
XIN
XOUT
F16MIN
F16MOUT
ASLRCK
ASDACK
ASDFIN
RVDD
RCHO
LRVSS
LCHO
LVDD
RESB
TEST
IOMODE
RAM
17 Car Audio 18 Car Audio
■ Playback functions
◆Playback speeds: 1 , 2 - CD-R/W: 1 , 2
◆Jitter-free playback (VCEC)
■ RF processing block
◆RF system: AGC, CD-R and R/W playback, peak hold, bottom hold
◆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
Super System-on-Chip Digital Servo IC with On-Chip RF SystemSuper System-on-Chip Digital Servo IC with On-Chip RF System
: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device.
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
Overview
Features
Overview
Block Diagram
Block Diagram
: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
finally refer to the latest specifications for the device.
■ EFM processing block
◆Error detection and correction (C1: double, C2: double)
◆Jitter margin: ±4 frames
◆DOUT output
◆Built-in text decoder
◆EFM signal sync detection, protection, and interpolation
■ Audio processing block
◆Interpolation (4 sample interpolation)
◆Digital attenuator
◆Deemphasis filter
◆1-bit D/A converter (third-order ∆∑ noise shaper converter)
◆8 oversampling digital filters
◆Fadeout function
◆Bilingual function
◆Built-in second-order audio output low-pass filter
◆Supports external supply of the digital filter and D/A converter clock
■ Supply voltage: 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
finally refer to the latest specifications for the device.
❋
❋
❋
: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device.
: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device.
❋
Conditional
Product
Conditional
Product
Conditional
Product
Conditional
Product
Under
development
Under
development
■ MP3 (MPEG audio standard ISO/IEC 11172-3 layer 3) decoder functions
◆Decoding and output as a digital audio signal of MP3 data decoded by the CD-ROM decoder
◆Supports all bit rates including variable bit rate decoding
◆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
■ CD-ROM decoder functions
◆Support for CD-ROM mode 1 and mode 2 (form 1 and form 2)
◆CD-ROM error correction function for faithful decoding of data written to CD-ROM discs
◆Header and sector management
◆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-ROM data
■ CD-DA playback functions (anti-skip support)
◆Up to 180 seconds of skip-proof operation when 64M of DRAM is used
◆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 I
2
S format, 16- or 20-bit PCM output precision, 16-, 24-, and 32-bit output modes selectable for data-slot output)
◆Digital bass boost function (4 modes), attenuator function, and muting (-∞, -12 dB) function
◆Base clock (384 Fs) output pin for external digital filters and D/A converter
■ DRAM interface
◆Supports use of 1 to 64M bits of external memory (EDO, 2 CAS, 16-bit data bus memory)
◆A user area can be allocated in DRAM during CD-ROM (MP3) playback
■ Supply voltages
◆Internal: 1.8 V
◆I/O: 3.3 V
◆Analog system: 3.3 V
■ Package: QFP80 (14 14)
Compact Disc Player MP3 DecoderCompact Disc Player MP3 Decoder
The LC78684E integrates, on a single chip, CD-ROM signal-processing functions, MP3 signal-processing
functions, and CD-DA anti-skip signal-processing functions.
These signal-processing functions are implemented as hard-wired circuits for reduced power consumption.
The LC78684E, in combination with a CD DSP, DRAM, an audio D/A converter, and other devices can
implement CD players that provide playback of MPEG layer 3 (MP3) audio recorded on CD media as well as
anti-skip CD-DA playback.