Key facts
- Brand
- Atmel
- Model
- T89C51RD2
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2012-05-09
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Atmel T89C51RD2 8-bit Microcontroller Datasheet
The T89C51RD2 is a high‑performance CMOS flash version of the 80C51 family, offering up to 64 KB of on‑chip flash, 2 KB EEPROM, and 1 KB XRAM. It supports 40 MHz operation in standard mode and 20 MHz in X2 mode, with multiple power‑supply options and a wide temperature range.
This datasheet includes a description of the device, feature list, pin‑out diagrams, special function register (SFR) mapping, clock waveform timing, ordering information, and package options, allowing designers to integrate the microcontroller into their applications.
Atmel T89C51RD2 specifications
| Flash memory size | 64 KB |
|---|---|
| EEPROM size | 2 KB |
| XRAM size | 1 KB |
| Maximum clock frequency | 40 MHz (X1 mode), 20 MHz (X2 mode) |
| Temperature range | 0 °C – +70 °C (commercial), –40 °C – +85 °C (industrial) |
| I/O ports | Four 8‑bit ports (six in 64/68‑pin packages) |
| Interrupt sources | 7 sources with 4 priority levels |
All Atmel T89C51RD2 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the flash memory capacity of the T89C51RD2?
The device contains 64 KB of on‑chip flash memory for program and data storage.
What temperature ranges can the T89C51RD2 operate in?
It works from 0 °C to +70 °C for commercial applications and from –40 °C to +85 °C for industrial use.
What is the flash memory capacity of the AT89C51RD2/ED2?
The device provides 64 KB of on‑chip flash program and data memory.
Which package types are available for this microcontroller?
It is offered in PLCC44, VQFP44, PLCC68, VQFP64, and PDIL40 packages.
What is the flash memory size of the AT89C51RD2/ED2?
The device includes 64 KB of on‑chip Flash program and data memory.
What voltage range does the AT89C51RD2/ED2 operate on?
It operates from a single supply of 2.7 V to 5.5 V.