Key facts
- Brand
- Atmel
- Model
- AT91SAM7A3
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-03-27
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Atmel AT91SAM7A3 Handbook
The AT91SAM7A3 is a 32‑bit ARM7™ microcontroller featuring a high‑performance RISC core, 256 KB flash, 32 KB SRAM, and a rich set of peripherals such as CAN controllers, ADCs, USARTs, PWM and USB device support. It targets embedded control applications that need high integration and low power consumption.
The handbook covers the device description, block diagram, signal definitions, package information, electrical characteristics, and an extensive errata/change log. It also includes detailed tables for pins, peripherals, and timing specifications to aid designers in hardware and firmware development.
Atmel AT91SAM7A3 specifications
| Processor Core | ARM7TDMI® (ARM® Thumb®) 32‑bit RISC |
|---|---|
| Flash Memory | 256 KB organized in 1024 pages of 256 bytes |
| SRAM | 32 KB high‑speed SRAM |
| Maximum Core Frequency | 30 MHz (single‑cycle access) |
| Page Programming Time | 6 ms (including auto‑erase) |
| Full Erase Time | 15 ms |
| Write Endurance | 10 000 cycles, 10‑year data retention |
| CAN Controllers | Two CAN 2.0B active controllers |
| ADC Channels | Two 8‑channel 10‑bit ADCs |
| USB Device Port | USB 2.0 Full Speed (12 Mbps) |
All Atmel AT91SAM7A3 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 page programming time for the AT91SAM7A3 flash?
The page programming time is 6 ms, which includes automatic page erase.
How many CAN controllers are integrated in the AT91SAM7A3?
The device includes two CAN 2.0B active controllers.
What processor core does the AT91SAM7A3 use?
It uses an ARM7TDMI Thumb processor, a 32‑bit RISC core.
How much flash memory is available on the AT91SAM7A3?
The device provides 256 KB of internal high‑speed flash organized in 1024 pages of 256 bytes each.