2

3507BS–NETST–6/05

AT78C4050

– Real Time DVD ECC Encoder and Decoder for 32 Kbyte Block

– Real Time DVD ECC Encoder and Decoder for Blue Laser DVD

– DVD EDC Error Detection

– Error Correction for Pre-pit, ATIP, ADIP, ID, Wobble Data for Blue Laser DVD

– Real Time CD CIRC Encoder and Decoder

– Real Time CD C3 ECC Encoder and Decoder

– CD EDC Error Detection

– CD Sub-code Error Correction

– EFM and EFM+ Modulation and Demodulation

– 1.7 PP Modulation and Demodulation for Blue Laser DVD

– Target ID Detection

– Support DVD-R/RW 2K and 32K Linking Loss

– Support CD-R/RW Link Sector Read

– Support CD-R/RW Address Mode 1 and Mode 2

– ATIP, ADIP, Pre-pit, Blue Laser DVD Wobble Information Decoder

– Supports SDRAM Up to 16 Mbytes (8M x 16)

– Support Buffer Underrun Prevention

– Support Variable Buffer Segmentation

– Circular Buffer Control with Access Priority

– Programmable Timing Control for SDRAM

– Servo Processing Unit Using ARM946E-S

Maximum Processing Power with 200 MHz System Clock

– Internal RAM for Code and Data (24 KB)

– Digital Servo Adapted to Various OPU

– Digital DPD for Tracking Error

– 1 and 3 Beams Push/Pull Tracking Detection

– Digital Detector for Blank Detect, Media Recognition and Defect Detect

– Wobble PLL, Pre-pit Detector, Frequency Demodulator, BPSK Demodulator

and MSK STW Demodulator

– PRML Read Channel to Support High Speed Transfer Rates

– RF Data Channel

• Wide Bandwidth Automatic Gain Control Analog Front-end

• 7-bit ADC for Sampling the PRML Read Signal

• 15 Tap Adaptive Digital FIR Equalizers

• Digital Viterbi Detector

– Clock Recovery and Synthesizer Functions

• Wide Frequency Range of Clock Extraction

• Frequency Synthesizer with M/N Dividers

• Supporting CLV, CAV, PCAV and ZCLV

• Supports Write Clock Synthesis with a Low Jitter PLL

– Integrated Servo Algebra and ALPC Functions

• Supports Sampled Signals for Differential Phase Detection (DPD),

and Push/Pull Tracking Detection

• Wobble Detection of DVD+R and DVD+RW