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| 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, E2PROM 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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