This file introduces the features of 80C51 series compatible 80C52, including 80C52 compatible 8051 pin and instruction set, four 8-bit I/O ports, three 16-bit timers/counters, 256 bytes of on-chip memory, 16KB of program memory, 1KB of additional on-chip SRAM for MOVX, ROMSIZE feature selects internal ROM size from 0 to 16KB, allows access to entire external memory mapping, dynamically adjustable by software, useful as boot block for external flash, 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, programmable clock source to save power, CPU 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 recovery, on-chip oscillator, on-chip power management, on-chip power monitor, on-chip reset, on-chip EEPROM, on-chip flash, on-chip RAM, on-chip I/O.
The Maxim DS87C520 and DS83C520 are high‑speed EPROM/ROM microcontrollers compatible with the 80C52 instruction set. They include large on‑chip memory, two full‑duplex hardware serial ports, and 13 interrupt sources (six external). Power‑management and EMI‑reduction modes are provided, and the devices support a high‑speed architecture.
These microcontrollers are offered in multiple package types, including 40‑pin PDIP, 44‑pin PLCC, 44‑pin TQFP, and 40‑pin windowed CERDIP. The datasheet also references the accompanying High‑Speed Microcontroller User’s Guide and notes RoHS compliance for the windowed ceramic DIP package.
| Package Types | 40‑pin PDIP, 44‑pin PLCC, 44‑pin TQFP, 40‑pin Windowed CERDIP |
|---|---|
| Instruction Set Compatibility | 80C52 compatible |
| Serial Ports | Two full‑duplex hardware serial ports |
| Interrupt Sources | 13 interrupt sources, six external |
| Power Management Mode | Enabled |
| EMI Reduction Mode | Disables ALE |
| RoHS Compliance | Pb‑free / RoHS‑compliant |
The devices are offered in 40‑pin PDIP, 44‑pin PLCC, 44‑pin TQFP, and 40‑pin windowed CERDIP packages.
It provides 13 interrupt sources, of which six are external.
Yes, the device is Pb‑free and RoHS‑compliant.
The guide can be downloaded from www.maxim-ic.com/microcontrolters.