Features and Benefits
- 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
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.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
DS87C530 Reliability Data1/12/2023
Using a EconOscillator™ to Clock an 8051 Microprocessor5/16/2008
The Fast 8051 Microcontroller: Leading the Way in Growth and Innovation6/29/2003
Interfacing the DS2760 1-Wire High-Precision Li-Ion Battery Monitor and Protection IC in a Microcontroller Environment8/27/2002
Micro Tutorial 1: Understanding DC Electrical Characteristics of Microcontrollers6/4/2002
Design Guidelines for Microcontrollers Incorporating NV RAM5/1/2001
Using the High-Speed Microcontroller as a Bootstrap Loader4/23/2001
Memory Expansion with the High-Speed Microcontroller Family3/29/2001
Using Power Management with High-Speed Microcontrollers3/29/2001
High-Speed Micro Memory Interface Timing3/29/2001
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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