Key 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/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

DS89C430, DS89C440, DS89C450: Functional Diagram

Applications/Uses

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