This document introduces the features and characteristics of AT91SAM9XE128/256/512 microcontrollers.
The AT91SAM9XE128 family integrates an ARM926EJ‑S™ Thumb processor delivering up to 200 MIPS at 180 MHz, on‑chip SRAM, flash memory, and a wide range of peripherals such as Ethernet MAC, USB device/host ports, ADC, and image‑sensor interface. The device is offered in 208‑pin PQFP and 217‑ball LFBGA packages with optional memory configurations (16 KB SRAM / 128 KB flash for the 128‑variant, larger for 256/512).
The handbook details the block diagram, pin multiplexing, signal definitions, electrical and mechanical characteristics, ordering information, and errata. It also describes the reset controller, power‑management controller, advanced interrupt controller, and peripheral DMA controller, providing designers with the data needed for hardware integration and firmware development.
| Internal Flash | 128 KB (128‑variant), 256 KB (256‑variant), 512 KB (512‑variant) |
|---|---|
| Internal SRAM | 16 KB (128‑variant) or 32 KB (256/512‑variant) |
| USB Device Port | USB 2.0 Full Speed (12 Mbps) Device Port |
| Ethernet MAC | 10/100 Base‑T |
| ADC | 4‑channel 10‑bit Analog‑to‑Digital Converter |
| Core Power Supply Voltage | 1.65 V to 1.95 V |
The device includes a USB 2.0 Full Speed (12 Mbps) device port and a USB 2.0 Full Speed host port with single or dual on‑chip transceivers.
The 128‑variant offers 16 KB internal SRAM and 128 KB internal flash; larger variants provide 32 KB SRAM and up to 512 KB flash.
Core and backup supplies require 1.65 V to 1.95 V, while I/O supplies operate from 1.65 V up to 3.6 V.