DS89C420

- DS89C420 Ultra-High-Speed Microcontroller www.maxim-ic.com GENERAL DESCRIPTION The DS89C420 offers the highest performance available in 8051-compatible microcontrollers. It features a redesigned processor core that executes every 8051 instruction (depending on the instruction type) up to 12 times faster than the original for the same crystal speed. Typical applications see a speed improvement of 10 times using the same code and crystal. The DS89C420 offers a maximum crystal speed of 33MHz, achieving execution rates up to 33 million instructions per second (MIPS). 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 See page 2 for a complete list of features. APPLICATIONS Data Logging Vending Automotive Test Equipment Motor Control Magstripe Reader/Scanner Consumer Electronics Gaming Equipment Appliances (Washers, Microwaves, etc.) Telephones HVAC Building Security and Door Access Control Building Energy Control and Management Uninterruptible Power Supplies Programmable Logic Controllers Industrial Control and Automation PIN CONFIGURATIONS TOP VIEW P1.0/T2 P1.1/T2EX P1.2/RXD1 P1.3/TXD1 P1.4/INT2 P1.5/INT3 P1.6/INT4...