DESCRIPTION

· The DS89C430 and DS89C450 are high-performance 8051-compatible microcontrollers with newly designed processor cores that execute instructions up to 12 times faster than the original 8051 at the same crystal speed.

· They achieve 33 MIPS performance from a maximum 33MHz clock rate, offering a typical speed improvement of up to 10x in applications.

· The DS89C440, a 32 kB version of the DS89C450, is no longer available, and the DS89C450 can be used as a drop-in replacement.

· The Ultra-High-Speed Flash Microcontroller User’s Guide should be used alongside this datasheet.

FEATURES

· High-Speed 8051 Architecture: One clock-per-machine cycle, DC to 33MHz operation, single-cycle instruction in 30ns, optional variable-length MOVX, dual data pointers, and support for 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.

APPLICATIONS

· Data Logging

· Telephones

· White Goods

· HVAC

· Building Energy Control and Management

· Uninterruptible Power Supplies

· Automotive Test Equipment

· Industrial Control and Automation

· Motor Control

· Vending

· Magstripe Reader/Scanner

· Gaming Equipment

· Programmable Logic Controllers

· Building Security and Door Access Control

· Consumer Electronics