This document is a summary of the AT91SAM7S series processors, including the features and characteristics of the processors, memory, peripheral interfaces, etc.
The AT91SAM7S256 is a low‑pin‑count 32‑bit ARM7TDMI® microcontroller with high‑speed Flash (256 KB) and SRAM (64 KB), a rich set of peripherals including USB 2.0 Full‑Speed, USART, SPI, TWI, ADC and PWM, and power‑management features such as brown‑out detection and watchdog.
The document contains a block diagram, signal description tables, configuration summaries for the whole AT91SAM7S family, ordering information for various package types, and a revision history that tracks updates to memory timings, peripheral features and package drawings.
| Processor Core | ARM7TDMI® ARM® Thumb® |
|---|---|
| Flash Memory | 256 KB (single plane) |
| SRAM | 64 KB |
| Maximum Clock Frequency | 30 MHz |
| Operating Voltage (VDDIN) | 3.0 V to 3.6 V |
| Core Voltage (VDDCORE) | 1.65 V to 1.95 V |
| Operating Temperature Range | -40 °C to 85 °C |
It incorporates the ARM7TDMI® ARM® Thumb® processor.
Yes, it includes one USB 2.0 Full‑Speed device port (except for the AT91SAM7S32/16 variants).