AT78C1502

www.DataSheet4U.com Features Servo Processing Unit (SPU), Using Dedicated 16-bit Instruction Cycle AVR® RISC Cores (3), Giving 120 MIPS Maximum Processing Power with 40 MHz SYSCLK SPU Includes 17 x 17 Single-clock Cycle MAC On-chip Debugger Monitor for Program Development (OCDM) 8K Words Program RAM 4K Bytes Data RAM On-chip Clock Frequency Synthesizer with Output Clock Buffers for AT78C1501 Controller On-chip S/H and WCS Timing State Machine (TSM) for Conversion of Focus, Tracking and SUM Signals 10-bit 1.2 µsec ADC with six-channel MUX Synchronized ADC Conversions with SPU Interrupt Service Routine Three Fast 10-bit 500 nsec (rise time) DACs for Servo Loops and Adjustments Three 8-bit DACs for Offset Adjustment and Spin Loop Bandgap ADC and DAC Midpoint Reference Outputs SPU Implemented Spindle Speed Control Spindle Interface Logic and Hardware Support for Both CAV and CLV Spindle Control Modes Eight General Purpose I/O Pins SPU Servo Control of Focus, Fine Track, Coarse Track and Tray Load Motors High-speed Track Counter for Accurate High-speed Track Counts (1.4 MHz when used with AT78C1503 Read Channel) Lower Power Operations with 3.3V Core and 5V Tolerant I/Os 8-bit Data and 14-bit Address Controller/Microprocessor Interface 3-pin Universal Serial Port Interface to Program Read Channel and Power Devices Power Management On-chip UART to Access OCDM Unit DVD/CD Servo AT78C1502 Description The Atmel AT78C1502 high-performance s...