DS89C420_05 Datasheet, PDF (1/47 Pages) Maxim Integrated Products – Ultra-High-Speed Microcontroller

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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).
The DS89C430 ultra-high-speed flash microcontroller
is an improved version of the DS89C420. The device
offers more features, such as in-application
programming, for approximately the same price.
Engineers interested in the DS89C420 are
encouraged to compare both devices when selecting
an ultra-high-speed flash microcontroller.
APPLICATIONS
Data Logging
Vending
Automotive Test
Equipment
Motor Control
Gaming Equipment
Magstripe
Reader/Scanner
Consumer Electronics
Telephones
Appliances (Washers,
Microwaves, etc.)
Security and Door Access
Control
Building Energy Control and
Management
Uninterruptible Power
Supplies
Programmable Logic
Controllers
Industrial Control and
Automation
ORDERING INFORMATION
PART
TEMP RANGE
MAX
CLOCK
SPEED
(MHz)
DS89C420-MNG -40°C to +85°C
25
DS89C420-QNG -40°C to +85°C
25
DS89C420-ENG -40°C to +85°C
25
DS89C420-MCL 0°C to +70°C
33
DS89C420-QCL 0°C to +70°C
33
DS89C420-ECL 0°C to +70°C
33
DS89C420-MNL -40°C to +85°C
33
DS89C420-QNL -40°C to +85°C
33
DS89C420-ENL -40°C to +85°C
33
PIN-
PACKAGE
40 PDIP
44 PLCC
44 TQFP
40 PDIP
44 PLCC
44 TQFP
40 PDIP
44 PLCC
44 TQFP
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
§ High-Speed Architecture
1 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 Auto
Increment/Decrement and Toggle Select
Supports Four Paged Modes
§ Power Management Mode
Programmable Clock Divider
Automatic Hardware and Software Exit
§ 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
The Ultra-High-Speed Flash Microcontroller User’s Guide
should be used in conjunction with this data sheet.
Download it at www.maxim-ic.com/microcontrollers.
Pin Configurations appear at end of data sheet.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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REV: 081805