GENERAL DESCRIPTION
The DS89C430, DS89C440, and DS89C450 offer the highest performance available in 8051-compatible microcontrollers. They feature newly designed processor cores that execute instructions up to 12 times faster than the original 8051 at the same crystal speed. Typical applications will experience a speed improvement up to 10x. At 1 million instructions per second (MIPS) per megahertz, the microcontrollers achieve 33 MIPS performance from a maximum 33MHz clock rate.

FEATURES
■ High-Speed 8051 Architecture
    One Clock-Per-Machine Cycle
    DC to 33MHz Operation
    Single Cycle Instruction in 30ns
    Optional Variable Length MOVX to Access
        Fast/Slow Peripherals
    Dual Data Pointers with Automatic
        Increment/Decrement and Toggle Select
    Supports Four Paged Memory-Access Modes
■ On-Chip Memory
    16kB/32kB/64kB Flash Memory
    In-Application Programmable
    In-System Programmable Through Serial Port
    1kB SRAM for MOVX
■ 80C52 Compatible
    8051 Pin and Instruction Set Compatible
    Four Bidirectional, 8-Bit I/O Ports
    Three 16-Bit Timer Counters
    256 Bytes Scratchpad RAM
■ Power-Management Mode
    Programmable Clock Divider
    Automatic Hardware and Software Exit
■ ROMSIZE Feature
    Selects Internal Program Memory Size from
        0 to 64kB
    Allows Access to Entire External Memory Map
    Dynamically Adjustable by Software
■ Peripheral Features
    Two Full-Duplex Serial Ports
    Programmable Watchdog Timer
    13 Interrupt Sources (Six External)
    Five Levels of Interrupt Priority
    Power-Fail Reset
    Early Warning Power-Fail Interrupt
    Electromagnetic Interference (EMI) Reduction

APPLICATIONS
    Data Logging
    White Goods
    Motor Control
    Magstripe Reader/Scanner
    Telephones
    HVAC
    Vending
    Gaming Equipment
    Building Energy Control and Management
    Programmable Logic Controllers
    Uninterruptible Power Supplies
    Building Security and Door Access Control
    Automotive Text Equipment
    Consumer Electronics
    Industrial Control and Automation