DESCRIPTION

L6363 is a 0.18µm CMOS PRML R/W channel supporting data rates up to 750Mb/sec with Servo Demodulation, Clock Synthesis, Channel Quality Monitor for channel optimization and Disk Surface Defect Scan capability

■ SIGNAL PROCESSING

– PR4 signal equalization and loops

– 8th order optimized low pass filter with programmable cut-off frequency and boost

– single flash 6-bit ADC

– 5-TAP programmable/self-adaptive digital FIR for signal equalization

– Programmable/self-adaptive Offset and MR Head Asymmetry compensation for signal equalization

– Timing and Gain loops for optimum data recovery

– Encoder scheme:

– Rate 304/338 with Local ECC (16/17 without Local ECC)

– Detector scheme:

– Media Noise TerminatorTM Detector

– Optional Local ECC Post Processing scheme

– 8-bit NRZ interface to disk controller

– Thermal Asperity detection/compensation and Erasure Flag

■ WRITE

– 2 level Write Precomp for Non Linear Transition Shift compensation

– Asynchronous and Synchronous Direct Write for disk/head characterization

■ SERVO

– Digital Synchronous Servo with data rates up to 75MHz (8x Ovsersampling)

– Internal Burst and Grey Code detection

– Repeatable Run Out Support

■ CHANNEL QUALITY MONITOR

– Fast read parameters optimization for minimum BER

– Advanced Disk Surface Defect Scan

■ QUALITY AND RELIABILITY

– BIST for analog front-end and digital back-end

– Iddq and I/O pins mapping

■ POWER SUPPLY AND CONTROL

– 2.5V Analog and 1.8V Digital supply; 1.8V to 3.3V supply for I/O pins

– Advanced Power Management features