GENERAL DESCRIPTION
The ADSP-2104 and ADSP-2109 processors are single-chip microcomputers optimized for digital signal processing (DSP) and other high speed numeric processing applications. The ADSP-2104/ADSP-2109 processors are built upon a common core. Each processor combines the core DSP architecture— computation units, data address generators, and program sequencer—with differentiating features such as on-chip program and data memory RAM (ADSP-2109 contains 4K words of program ROM), a programmable timer, and two serial ports.

SUMMARY
    16-Bit Fixed-Point DSP Microprocessors with On-Chip Memory
    Enhanced Harvard Architecture for Three-Bus Performance: Instruction Bus & Dual Data Buses
    Independent Computation Units: ALU, Multiplier/ Accumulator, and Shifter
    Single-Cycle Instruction Execution & Multifunction Instructions
    On-Chip Program Memory RAM or ROM & Data Memory RAM
    Integrated I/O Peripherals: Serial Ports and Timer

FEATURES
    20 MIPS, 50 ns Maximum Instruction Rate
    Separate On-Chip Buses for Program and Data Memory
    Program Memory Stores Both Instructions and Data (Three-Bus Performance)
    Dual Data Address Generators with Modulo and Bit-Reverse Addressing
    Efficient Program Sequencing with Zero-Overhead Looping: Single-Cycle Loop Setup
    Automatic Booting of On-Chip Program Memory from Byte-Wide External Memory (e.g., EPROM )
    Double-Buffered Serial Ports with Companding Hardware, Automatic Data Buffering, and Multichannel Operation
    Three Edge- or Level-Sensitive Interrupts
    Low Power IDLE Instruction
    PLCC Package