GENERAL DESCRIPTION
The ADSP-21020 is the first member of Analog Devices’ family of single-chip IEEE floating-point processors optimized for digital signal processing applications. Its architecture is similar to that of Analog Devices’ ADSP-2100 family of fixed-point DSP processors.

FEATURES
   Superscalar IEEE Floating-Point Processor
   Off-Chip Harvard Architecture Maximizes Signal
      Processing Performance
   30 ns, 33.3 MIPS Instruction Rate, Single-Cycle
      Execution
   100 MFLOPS Peak, 66 MFLOPS Sustained Performance
   1024-Point Complex FFT Benchmark: 0.58 ms
   Divide (y/x): 180 ns
   Inverse Square Root (1/√x): 270 ns
   32-Bit Single-Precision and 40-Bit Extended-Precision
      IEEE Floating-Point Data Formats
   32-Bit Fixed-Point Formats, Integer and Fractional,
      with 80-Bit Accumulators
   IEEE Exception Handling with Interrupt on Exception
   Three Independent Computation Units: Multiplier,
      ALU, and Barrel Shifter
   Dual Data Address Generators with Indirect,
      Immediate, Modulo, and Bit Reverse Addressing Modes
   Two Off-Chip Memory Transfers in Parallel with
      Instruction Fetch and Single-Cycle Multiply & ALU
      Operations
   Multiply with Add & Subtract for FFT Butterfly
      Computation
   Efficient Program Sequencing with Zero-Overhead
      Looping: Single-Cycle Loop Setup
   Single-Cycle Register File Context Switch
   15 (or 25) ns External RAM Access Time for
      Zero-Wait-State, 30 (or 40) ns Instruction Execution
   IEEE JTAG Standard 1149.1 Test Access Port and
      On-Chip Emulation Circuitry
   223-Pin PGA Package (Ceramic)