The document describes a product that incorporates the ARM7TDMI ARM Thumb processor, with high-performance 32-bit RISC architecture, high-density 16-bit instruction set, and leading MIPS/Watt performance. The product also features internal high-speed flash, internal high-speed SRAM, external bus interface, memory controller, and reset controller.
The AT91SAM7SE series from Atmel combines an ARM7TDMI® core with on‑chip Flash, SRAM and a rich set of peripherals, targeting embedded control applications. The AT91SAM7SE256 variant offers 256 KB of Flash, 32 KB of SRAM, and 88 programmable I/O lines, plus interfaces such as USB 2.0 Full Speed, SPI, USART, and an External Bus Interface.
The device is supplied in either a 128‑lead LQFP or a 144‑ball LFBGA package and operates from 1.8 V to 3.6 V, with a maximum clock frequency of 55 MHz. Detailed pin‑out, signal descriptions, and ordering codes are provided, along with revision history and package outlines.
| Core Processor | ARM7TDMI (ARM Thumb) |
|---|---|
| Flash Size | 256 KB |
| SRAM Size | 32 KB |
| Maximum Frequency | 55 MHz |
| Operating Voltage (VDDIO) | 3.0 V – 3.6 V |
| GPIO Pins | 88 |
| USB Device Port | USB 2.0 Full Speed (12 Mbit/s) |
| Package Options | LQFP128, LFBGA144 |
The AT91SAM7SE256 contains 256 KB of high‑speed Flash memory.
It provides 88 programmable I/O lines.
The device includes a USB 2.0 Full Speed (12 Mbit/s) device port.