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