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REV: 040104

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.

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

PIN CONFIGURATIONS

DALLAS

DS87C530

DS83C530

34

46

20

8

7

1

47

21

33

PLCC

WINDOWED LCC

DALLAS

DS87C530

DS83C530

39

27

1

13

26

40

14

52

TQFP

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DALLAS is a registered trademark of Dallas Semiconductor Corp.

MAXIM is a registered trademark of Maxim Integrated Products, Inc.

www.maxim-ic.com

DS87C530/DS83C530

EPROM/ROM Microcontrollers with

Real-Time Clock

The High-Speed Microcontroller User’s Guide must

be used in conjunction with this data sheet. Download it

at: www.maxim-ic.com/microcontrollers.