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DS83C530, DS87C530
EPROM Microcontrollers with Real-Time Clock


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Description
FULL DATA SHEET (PDF, 1.0MB)
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The DS87C530/DS83C530 EPROM/ROM microcontrollers with a real-time clock (RTC) are 8051-compatible microcontrollers based on the Dallas Semiconductor high-speed core. They use 4 clocks per instruction cycle instead of the 12 used by the standard 8051. They also provide a unique mix of peripherals not widely available on other processors. They include an on-chip RTC and battery backup support for an on-chip 1k x 8 SRAM. The new Power Management Mode allows software to select reduced power operation while still processing.

A combination of high-performance microcontroller core, RTC, battery-backed SRAM, and power management makes the DS87C530/DS83C530 ideal for instruments and portable applications. They also provide several peripherals found on other Dallas high-speed microcontrollers. These include two independent serial ports, two data pointers, on-chip power monitor with brownout detection and a watchdog timer.

Power Management Mode (PMM) allows software to select a slower CPU clock. While default operation uses four clocks per machine cycle, the PMM runs the processor at 64 or 1024 clocks per cycle. There is a corresponding drop in power consumption when the processor slows.

The EMI reduction feature allows software to select a reduced emission mode. This disables the ALE signal when it is unneeded.

The DS83C530 is a factory mask ROM version of the DS87C530 designed for high-volume, costsensitive applications. It is identical in all respects to the DS87C530, except that the 16kB of EPROM is replaced by a user-supplied application program. All references to features of the DS87C530 will apply to the DS83C530, with the exception of EPROM-specific features where noted. Please contact your local Dallas Semiconductor sales representative for ordering information.

Note: The DS87C530/DS83C530 are monolithic devices. A user must supply an external battery or super cap and a 32.768kHz timekeeping crystal to have permanently powered timekeeping or nonvolatile RAM. The DS87C530/DS83C530 provide all the support and switching circuitry needed to manage these resources.

Key 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

Key Specifications:   8051 Drop-Ins
Part Number Internal Program Memory Internal MOVX SRAM Serial Ports 16-bit Timers Data Pointers 10/100 Ethernet MAC Features Watchdog Power Fail Reset & Interrupt Power Mgmt. Mode Ring Osc. Supply Voltage (V) 5V-Tolerant I/O EV-Kit RoHS Available Package Smallest Available Package (max w/pins) (mm2) Price**
DS83C530  16kB ROM 1kB 2 3 2 No
256-Byte Internal Scratchpad
Multiple External Interrupts
Real-Time Clock
Reduced EMI Mode
Yes Yes Yes Yes 4.5 to 5.5 Yes No See Data Sheet See Data Sheet  -   
DS87C530  16kB EPROM
256-Byte Internal Scratchpad
Multiple External Interrupts
Nonvolatile SRAM
Real-Time Clock
Reduced EMI Mode
Yes CQUAD/52
PLCC/52
TQFP/52
149 $16.00 @ 1k
See All 8051 Drop-Ins (10)
Notes:
**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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    2007-07-11
    This page last modified: 2008-01-23




             


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