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Ultra-High-Speed Microcontroller

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet Aug 19, 2005

Support & Training

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Key Features

  • 80C52 Compatible
    • 8051 Pin- and Instruction-Set Compatible
    • Four Bidirectional I/O Ports
    • Three 16-Bit Timer Counters
    • 256 Bytes Scratchpad RAM
  • On-Chip Memory
    • 16kB Flash Memory
    • In-System Programmable through Serial Port
    • 1kB SRAM for MOVX
  • ROMSIZE Feature
    • Selects Internal Program Memory Size from 0 to 16k
    • Allows Access to Entire External Memory Map
    • Dynamically Adjustable by Software
  • High-Speed Architecture
    • 1 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 Auto Increment/Decrement and Toggle Select
    • Supports Four Paged Modes
  • Power Management Mode
    • Programmable Clock Divider
    • Automatic Hardware and Software Exit
  • 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

Applications/Uses

  • Appliances (Washers, Microwaves, Etc.)
  • Automotive Test Equipment
  • Building Energy Control and Management
  • Consumer Electronics
  • Data Logging
  • Gaming Equipment
  • Industrial Control and Automation
  • Magstripe
  • Motor Control
  • Programmable Logic Controllers
  • Reader/Scanner
  • Security and Door Access Control
  • Telephones
  • Uninterruptible Power Supplies
  • Vending

Description

The DS89C420 was the first member of Maxim's ultra-high-speed flash microcontroller product line. It featured a redesigned processor core that executed every 8051 instruction (depending on the instruction type) up to 12 times faster than the original for the same crystal speed. Typical applications saw a speed improvement of 10 times using the same code and crystal. At a maximum crystal speed of 33MHz, execution rates up to 33 million instructions per second (MIPS) could be achieved.

The DS89C420 is no longer available. It has been replaced by the DS89C430, which is the same device except that it offers the in-application programming feature for approximately the same price. Engineers interested in the DS89C420 should order the corresponding DS89C430 device as shown in the table above.

Simplified Block Diagram

Technical Docs

Data Sheet Aug 19, 2005

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.