AT91SAM9XE256-QU

The AT91SAM9XE256-QU is a single‑core 32‑bit microprocessor based on the ARM926EJ‑S core, rated for 180 MHz operation. Designed for industrial embedded applications, it combines an integrated processor core with on‑chip memories, high‑speed peripherals and flexible external bus support to address connectivity, human‑machine interface and imaging use cases.

Its value proposition centers on integration and deterministic performance: a cached ARM926EJ‑S core delivering up to 200 MIPS at 180 MHz, internal flash and SRAM for reduced external memory needs, and a broad set of interfaces including USB, Ethernet and an image sensor interface for compact system designs.

Key Features

• Core ARM926EJ‑S processor core, single 32‑bit core running at 180 MHz with caches (8 KB data, 16 KB instruction) and a Memory Management Unit for protected, high‑performance embedded code execution.
• Performance Up to 200 MIPS at 180 MHz as specified for the series, providing predictable processing throughput for control, connectivity and media tasks.
• Embedded Memory On‑chip nonvolatile and volatile memory: 256 Kbytes internal high‑speed flash for code and data storage, one 32 Kbyte internal SRAM and one 32 Kbyte internal ROM with single‑cycle access at maximum matrix speed.
• Flash Controller and Reliability Enhanced Embedded Flash Controller (EEFC) with 128‑bit wide memory interface, fast read time and managed page programming/erase characteristics to simplify in‑system firmware updates.
• External Bus Interface (EBI) 32‑bit external bus matrix supporting SDRAM, static memories, ECC‑enabled NAND flash and CompactFlash, enabling flexible memory and storage expansion.
• Connectivity Integrated USB 2.0 Full Speed device port with on‑chip transceiver and configurable DPRAM; USB 2.0 host single port in the 208‑pin PQFP variant. Also includes an Ethernet MAC supporting 10/100 Base‑T with dedicated DMA channels and 128‑byte FIFOs.
• Imaging and Display Image Sensor Interface compatible with ITU‑R BT.601/656, programmable frame capture, 12‑bit data support and a preview path with scaler; display interface controllers for LCD and touchscreen support.
• System and Peripherals Rich system controller features including reset and shutdown controllers, clock generator with multiple PLL options, power management controller, advanced interrupt controller, timers (periodic interval timer, watchdog, real‑time timer) and a debug unit with EmbeddedICE and Debug Communication Channel support.
• Package & Mounting 208‑lead PQFP package (208‑PQFP, 28×28) in a surface‑mount form factor suitable for dense PCB assemblies.
• Industrial Temperature Grade Rated for operation from ‑40 °C to 85 °C for deployment in industrial environments.

Typical Applications

• Industrial Control and Automation – Real‑time control, field device gateways and HMI controllers leveraging the ARM926EJ‑S core, on‑chip flash and industrial temperature rating.
• Networking and Connectivity – Ethernet‑enabled devices and USB‑connected peripherals using the integrated 10/100 MAC and USB 2.0 ports for wired communications and host/device roles.
• Imaging and Machine Vision – Sensor capture and preview applications using the Image Sensor Interface with BT.601/656 support and on‑chip scaler for frame handling.
• Embedded HMI and Display Systems – LCD and touchscreen controller support combined with sufficient on‑chip memory for responsive user interfaces and local graphics management.

Unique Advantages

• Highly integrated memory set: Internal 256 KB flash, 32 KB SRAM and 32 KB ROM reduce external memory requirements and simplify BOM and board layout.
• On‑chip connectivity: Built‑in USB 2.0 Full Speed device and host support plus 10/100 Ethernet MAC enable networked and USB peripheral designs without large external controllers.
• Imaging‑ready interface: Dedicated image sensor interface with 12‑bit data support and preview/scaler path shortens development time for camera and vision applications.
• Industrial robustness: Specified operating range of ‑40 °C to 85 °C and a PQFP surface‑mount package suited for industrial assemblies.
• Deterministic performance: ARM926EJ‑S core with caches and MMU delivering up to 200 MIPS at 180 MHz for predictable embedded workload handling.
• Flexible external memory support: 32‑bit External Bus Interface supports SDRAM, NAND (ECC), static memories and CompactFlash for scalable storage and memory expansion.

Why Choose AT91SAM9XE256-QU?

The AT91SAM9XE256-QU positions itself as a balanced, highly integrated microprocessor solution for industrial embedded systems that need connectivity, imaging capability and reliable operation across a wide temperature range. With a cached ARM926EJ‑S core running at 180 MHz, substantial on‑chip flash and SRAM, and a broad set of peripherals including USB and Ethernet, it supports compact system designs while minimizing external components.

This device is suitable for engineers building industrial controllers, networked devices, imaging front ends or HMI platforms that require a combination of processing throughput, embedded storage and dedicated interfaces. Its integrated peripherals and external bus flexibility provide long‑term design scalability and simplified BOM management.

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