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AT80C51RD2 - 80C51 High Performance ROM 8-bit Microcontroller

General Description

AT80C51RD2 microcontrollers are high performance versions of the 80C51 8-bit microcontrollers.

Key Features

  • 80C52 Compatible.
  • Four 8-bit I/O Ports.
  • Three 16-bit Timer/Counters.
  • 256 Bytes Scratch Pad RAM.
  • 8 Interrupt Sources with 4 Priority Levels.
  • Dual Data Pointer.
  • Variable Length MOVX for Slow RAM/Peripherals.
  • High-speed Architecture.
  • 10 to 40 MHz in Standard Mode.
  • 16K/32K Bytes On-Chip ROM Program.
  • AT80C51RD2 ROMless Versions.
  • On-Chip 1024 bytes Expanded RAM (XRAM).
  • Software Selecta.

📥 Download Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Features • 80C52 Compatible – Four 8-bit I/O Ports – Three 16-bit Timer/Counters – 256 Bytes Scratch Pad RAM – 8 Interrupt Sources with 4 Priority Levels – Dual Data Pointer • Variable Length MOVX for Slow RAM/Peripherals • High-speed Architecture – 10 to 40 MHz in Standard Mode • 16K/32K Bytes On-Chip ROM Program • AT80C51RD2 ROMless Versions • On-Chip 1024 bytes Expanded RAM (XRAM) – Software Selectable Size (0, 256, 512, 768, 1024 bytes) – 256 Bytes Selected at Reset • Keyboard Interrupt Interface on Port P1 • 8-bit Clock Prescaler • 64K Program and Data Memory Spaces • Improved X2 Mode with Independant Selection for CPU and Each Peripheral • Programmable Counter Array 5 Channels with: – High-speed Output – Compare/Capture – Pulse Width Modulator – Watchdog Timer Capabilities • Asynchro