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