• MPEG I/II-Layer 3 Hardwired Decoder – Stand-alone MP3 Decoder – 48, 44.1, 32, 24, 22.05, 16 kHz Sampling Frequency – Separated Digital Volume Control on Left and Right Channels (Software Control Using 31 Steps) – Bass, Medium, and Treble Control (31 Steps) – Bass Boost Sound Effect – Ancillary Data Extraction – "CRC Error" and "MPEG Frame Synchronization" Indicators • Programmable Audio Output for Interfacing With Common Audio DAC – PCM Format Compatible – I2S Format Compatible • 8-bit MCU C51 Core Based (FMAX= 20 MHz) • 2304 Bytes of Internal RAM • 64K Bytes of Code Memory – Flash: AT89C51SND1C, ROM: AT83C51SND1C • 4K Bytes of Boot Flash Memory (AT89C51SND1C) – ISP: Download from USB or UART to Any External Memory Cards • USB Rev 1.1 Controller – "Full Speed" Data Transmission • Built-in PLL – MP3 Audio Clocks – USBClock • MultiMedia Card¢â Interface Compatibility • Atmel DataFlash |