Advertisement
Super System-on-Chip Digital Servo IC with On-Chip RF System
Super System-on-Chip Digital Servo IC with On-Chip RF System
LC78648NEH
LC78648NEH
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
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
Block Diagram
PHLPF/RFMON
MONITOR
VREF
VREF
LDD
APC
LDS
LPF
RF
RF SIGNAL
AIN
PROCESSOR
CIN
BIN
DIN
FEC
FOCUS ERROR
PROCESSOR
EIN
TRACKING
FIN
ERROR
TEC
TE
PROCESSOR
TEIN
JITTC
JITTER/DETECT
SLICE LEVEL
SLCO
EFMIN
CONTROL
PDO1
PDO2
PLL
PCKIST
VVDD
VVSS
XVDD
RAM
XVSS
XIN
CLOCK
XOUT
GENERATOR
F16MIN
F16MOUT
ASLRCK
EXTERNAL
ASDACK
AUDIO IN
ASDFIN
RVDD
RCHO
LPF
LRVSS
LCHO
LVDD
RESB
TEST
IOMODE
17 Car Audio
Conditional
Conditional
: Use of conditional products requires
Product
Product
consultation with a SANYO representative
prior to the use of the device.
Under
Under
development
development
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.
FDO
TDO
D/A
D/A
SPDO
SLDO
AUTO
AVDD1
RAM
AVSS
ADJUST
SERVO
AVDD2
TRACK
PROCESSEROR
RUPTURE
JUMP
DEFECR
CLA
DEFECT
CAV
DRF
DRF
CONTROL
VPB
CL
CE
CPU I/F
DI
DO
WRQB
CONT1 to 6
PORT
OUT1
FRAME SYNC
DETECT,PROTECT
FSEQ
INSERT
EFM DECODE
ERROR
FSX
EFLG
CORRECTION
C2F
MONITOR SIGNAL
MONI 1 to 5
INTERPOLATION
SELECTOR
MUTE
SUBCODE DECODE CRC &
ATTENUATION
TEXT
8FS DIGITAL
AUDIO OUT
FILTER
DOUT
DEEMPHASIS
LRSY
SERIAL
DATACK
1bit DAC
OUT
DATA
DVDD
DVDD
DVSS
DVSS
Compact Disc Player MP3 Decoder
Compact Disc Player MP3 Decoder
LC78684E
LC78684E
Overview
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.
Features
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
2
(Output supports the I
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)
: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.
Block Diagram
System
Clock-gen
CKIN
DRAM-I/F
VPRFR
VCO
VCOC
VPDO
+
CKOUT
PLL
WOK
Anti-Shock
CNTOK
OVF
Compressed, uncompressed
LRSY
DATACK
DATAIN
C2FIN
SFSY
PW
SBSY
SBCK
RESB
: Use of conditional products requires
: Use of conditional products requires
consultation with a SANYO representative
consultation with a SANYO representative
Conditional
Conditional
prior to the use of the device.
prior to the use of the device.
Product
Product
CPU-I/F
STREQ
Data-I/F
STCK
CDROM
STDAT
Decoder
CRCF
MP3
Decoder
FSYNC
M
U
X
ADLRCK
Audio I/F
ADBCK
ADDATA
18 Car Audio
Advertisement
