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參數(shù)資料
| 型號： | LC78684NE |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 14 MM, QFP-80 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 177K |
| 代理商： | LC78684NE |
Ordering number : ENN7695
60304TN (OT) No. 7695-1/24
Overview
The LC78684NE integrates CD-ROM signal-processing
functions, MP3 signal-processing functions, and CD-DA
anti-shock signal-processing functions on a single chip.
The LC78684NE achieves lower power consumption than
other approaches by implementing these signal-processing
functions with hardwired structures.
A CD player that supports MPEG audio (MP3) playback
from CD media as well as CD-DA anti-shock (prevents
audio skipping due to mechanical shock) playback can be
implemented by combining this IC with CD DSP, DRAM,
audio D/A converter, and other components.
Features
1. MP3 (MPEG audio standard (ISO/IEC 11172-3) layer
3) decoding function
Decodes MP3 data decoded from the CD-ROM
decoder to the original (digital) audio signal and
outputs that signal.
Supports all bit rates including variable bit rate
Supports the following sampling rates
MPEG1 (Fs = 32K, 44.1K, 48K)
MPEG2 (Fs = 16K, 22.05K, 24K)
MPEG2.5 (Fs = 8K, 11.025K, 12K)
Can read out the MPEG header information and the
ancillary information
Supports automatic muting when CRC errors occur
using an MP3 CRC check function
MPEG data external serial input function supports
playback from memory cards
2. CD-ROM decoding function
Supports CD-ROM mode 1 and mode 2 (forms 1 and 2)
CD-ROM error correction function provides faithful
and accurate decoding of data written to the CD-
ROM disc.
Header and sector management
Supports up to 4
×-speed playback
In addition to data buffering, also supports C2 error
flag buffering
External serial output of CD-ROM decoded data
3. CD-DA playback function (with anti-shock support)
Provides about 180 seconds of anti-shock play when
a 64M DRAM is used (when data compression is
used).
Supports both compressed and uncompressed, and
also provides a data through output
Supports VCEC (variable speed) playback up to 4
×
speed
4. Audio signal processing
Audio signal output is provided as a serial output
signal from the LRCK, BCK, and DATA pins
(I2S format and PCM output data have a precision of
16 or 20 bits, and 16, 24, and 32 bit output modes
are supported for data slot output.)
Digital bass boost (4 modes), attenuator, and muting
(–
∞, –12 dB) functions
Base clock (384 fs) output pin for use with external
digital filter or D/A converter circuits
5. DRAM interface
Supports EDO DRAM (1 to 64 Mb, 2 CAS, 16-bit
data path) or SDRAM (16 or 64 Mb, 16-bit data
path, CAS latency: 2, burst length: full) as external
memory
Supports allocation of a DRAM user area during
CD-ROM (MP3) playback
6. Package and supply voltage specifications
Package (units: mm): Sanyo QFP80 (14
× 14 mm)
Supply voltages:
Internal power supply: 1.8 V (typical)
I/O power supply: 3.3 V (typical)
Analog system power supply: 3.3 V (typical)
LC78684NE
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Compact Disc Player MP3 Decoder
CMOS IC
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
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