DS89C21TMX

GENERAL
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