DS87C530/DS83C530

EPROM/ROM Microcontrollers with

Real-Time Clock

www.maxim-ic.com

FEATURES

￿￿80C52 Compatible

8051 Instruction-Set Compatible Four 8-Bit I/O Ports

Three 16-Bit Timer/Counters 256 Bytes Scratchpad RAM

￿￿Large On-Chip Memory 16kB EPROM (OTP)

1kB Extra On-Chip SRAM for MOVX

￿￿ROMSIZE Features

Selects Effective On-Chip ROM Size from 0 to 16kB

Allows Access to Entire External Memory Map Dynamically Adjustable by Software

Useful as Boot Block for External Flash

￿￿Nonvolatile Functions

On-Chip Real-Time Clock with Alarm Interrupt Battery Backup Support of 1kB SRAM

￿￿High-Speed Architecture

4 Clocks/Machine Cycle (8051 = 12) Runs DC to 33MHz Clock Rates Single-Cycle Instruction in 121ns Dual Data Pointer

Optional Variable Length MOVX to Access Fast/Slow RAM /Peripherals

￿￿Power Management Mode Programmable Clock Source Saves Power Runs from (crystal/64) or (crystal/1024) Provides Automatic Hardware and Software Exit

￿￿EMI Reduction Mode Disables ALE

￿￿Two Full-Duplex Hardware Serial Ports

￿￿High Integration Controller Includes: Power-Fail Reset

Early-Warning Power-Fail Interrupt Programmable Watchdog Timer

￿￿14 Total Interrupt Sources with Six External

PIN CONFIGURATIONS

TOP VIEW

7147

8

46

DALLAS

DS87C530

DS83C530

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2133

PLCC, WINDOWED CLCC

3927

40

26

DALLAS

DS87C530

DS83C530

52

14

113

TQFP

The High-Speed Microcontroller User’s Guide must be used in conjunction with this data sheet. Download it at: www.maxim-ic.com/microcontrollers.

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: 070505