Key facts
- Brand
- Atmel
- Model
- AT89C51RE2
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-09
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ATMEL 8-bit Flash Microcontroller AT89C51RE2 Manual
This manual describes the AT89C51RE2 8‑bit Flash microcontroller, its high‑speed architecture, memory organization, and peripheral set. It includes a feature list, block diagram, pin configurations, and detailed SFR mapping for developers.
The document also covers electrical characteristics, package options, and ordering information, along with Atmel contact details for support and literature requests.
Atmel AT89C51RE2 specifications
| Flash memory size | 128 Kbytes |
|---|---|
| Expanded RAM (XRAM) size | 8192 bytes |
| Operating voltage | 2.7 V to 5.5 V |
| Temperature range | -40 °C to +85 °C (Industrial) |
| Available packages | PLCC44, VQFP44, VQFP64 |
| Maximum CPU frequency (standard mode) | 40 MHz |
| Maximum CPU frequency (high‑voltage mode) | 60 MHz |
| Interrupt sources | 11 sources with 4 priority levels |
| I/O ports | Six 8‑bit ports (64‑pin or 68‑pin versions) |
All Atmel AT89C51RE2 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the flash memory size of the AT89C51RE2?
The AT89C51RE2 contains 128 Kbytes of on‑chip flash program/data memory.
What voltage range does the AT89C51RE2 operate on?
It operates from 2.7 V up to 5.5 V.
What is the size of the on‑chip Flash memory?
The AT89C51RE2 contains 128 KB of on‑chip Flash memory.
What voltage range does the AT89C51RE2 operate at?
It operates from 2.7 V up to 5.5 V.