W9986D
MPEG Audio Layer III Decoder
GENERAL DESCRIPTION
The W9986D is a highly integrated USB MPEG
audio decoder chip with Digital Voice Recorder
(DVR) function built-in. This MPEG Layer III audio
decoder is capable of decoding layer III compressed
streams, as specified in MPEG 1 and MPEG 2 ISO
standards. And it also has integrated many
peripheral controllers such that it can directly
interface to audio codec, flash memory, USB, etc, to
minimize PC board area and system cost.
Digital Sound Control
Digital volume control and stereo channel mixer
Digital bass and treble control
Low power 2.5V (core) and 3.3V (I/O) Operation,
with 5V input tolerance
128-pin LQFP Package
FEATURES
Single-chip MPEG Audio Decoder with Voice
Recoder /Decoder
48 MIPS 16-bit DSP with internal OM and DM for
MPEG audio decoder and DVR function
48 MHz double-frequency W78C58 micro
controller with internal 64Kbytes program ROM
and 6 Kbytes data RAM
I2S and SSI audio codec serial interface
SmartMedia, CompactFlash and MMC flash
memory interface. Hardware for SmartMedia
ECC and MMC CRC generation
USB 1.1 full speed interface that support Control,
Bulk-In, Bulk-Out and Interrupt-In transfer by
hardware or 8051 software
24 GPIO for keypad and system control
MPEG 1/2/2.5 Layer3 Decoder
ISO/IEC 11172-3 MPEG 1 audio layer 3 decoder
ISO/IEC 13818-3.2 MPEG 2 audio layer 3
decoder
MPEG 2.5 lower sampling frequencies audio
decoder
Support all the sampling frequencies of 48, 44.1,
32, 27.4, 22.05, 16, 12, 11.025, and 8 KHz
Low Bit Rate DVR (Digital Voice Recorder)
5.3/6.3 Kbps bit rate voice recording
8KHz voice sampling frequency with 16-bit
resolution
Support Silence-Detection and
Comfort-Noise-generation
APPLICATIONS
Following figure shows a typical portable player
using W9986D.
Program Memory
ROM, E
2
PROM or Flash
Optional
8051/52 ICE or uC
MIC
SPK
Audio
Codec
W9986D
Single-Chip USB
MPEG Audio Decoder
USB
LCD
Keypad
PC
Flash Memory
SmartMedia/
CompactFlash
MultiMetiaCard
Winbond Corporate Headquarters
Tel: 886-3-5790666
Fax: 886-3-5796139
Taipei Sales Office
Tel: 886-2-27190505
Fax: 886-2-27197502
Winbond Electronics North America Corp.
Tel: 1-408-943666
Fax: 1-408-9436668
Winbond Electronics H.K. Ltd.
Tel: 852-27513100
Fax: 852-27552064
Oct. 2001
Details are subject to change without notice. All trade marks are property of their respective holders.
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