Supply original DS87C530-QCL+, Embedded - Microcontrollers, by Maxim Integrated

DETAILED
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.
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