AT91SAM9G20B-CU

The AT91SAM9G20B-CU is an embedded microprocessor unit based on the Arm926EJ-S core running at 400 MHz. It combines a high-performance processor core with on-chip memories and a broad set of peripherals for networked and industrial embedded designs.

Designed for industrial applications, the device integrates Ethernet, USB host/device capabilities, an External Bus Interface (EBI) for diverse memory options, and an image sensor interface—delivering a compact, highly integrated solution for connectivity, imaging and control systems.

Key Features

• Core and Performance Arm926EJ-S processor at 400 MHz with 32-Kbyte data cache, 32-Kbyte instruction cache and a write buffer; includes Memory Management Unit and EmbeddedICE debug support.
• On-chip Memory One 64-Kbyte internal ROM and two 16-Kbyte internal SRAM blocks with single-cycle access at maximum matrix speed.
• Memory Interfaces External Bus Interface (EBI) supporting SDRAM, static memory, ECC-enabled SLC NAND Flash and CompactFlash for flexible system memory architectures.
• Networking and USB Integrated Ethernet MAC 10/100 Base-T with dedicated DMA channels and 128-byte FIFOs; USB 2.0 full-speed device port plus dual-port USB host capability with on-chip transceivers and configurable DPRAM.
• Image Sensor Interface ITU-R BT.601/656 external interface with 12-bit data support, programmable frame capture and preview path with scaler—suitable for camera and vision input.
• Peripheral Set Standard peripherals including USART, SPI, TWI, Timer Counters, Synchronous Serial Controller, ADC and MultiMedia Card Interface for broad I/O needs.
• Bus Matrix and DMA Six 32-bit layer matrix providing high internal bandwidth and dedicated DMA channels for Ethernet and USB peripherals.
• Clock and Power On-chip oscillators (3–20 MHz and internal low-power RC), selectable 32.768 kHz low-power oscillator, and PLL options up to the device-specified ranges for flexible clocking and power management.
• System Control and Debug Advanced Interrupt Controller, Reset Controller, Power Management Controller, Debug Unit and 128-bit backup registers for robust system control and development support.
• Package and Environmental 217-LFBGA (15×15) surface-mount package; industrial grade with operating temperature −40 °C to 85 °C and RoHS compliance.

Typical Applications

• Industrial Networking Equipment — Use the integrated 10/100 Ethernet MAC and robust DMA support to build switches, gateways and controllers with reliable network connectivity.
• Embedded Vision and Image Capture — The image sensor interface and scaler enable camera input, frame capture and preview paths for imaging modules and vision systems.
• USB-enabled Peripheral Devices — On-chip USB device and dual-port host controllers provide USB connectivity for data acquisition, storage interfaces and peripheral hubs.
• Industrial Control and HMI — Combine the processor performance, extensive peripheral set and wide operating temperature range to drive human-machine interfaces, control panels and instrumentation.

Unique Advantages

• Highly integrated connectivity: On-chip Ethernet and USB host/device controllers reduce external PHY and controller components, simplifying BOM and board design.
• Flexible memory support: EBI compatibility with SDRAM, static memories and ECC-capable NAND Flash enables scalable storage and system memory configurations.
• Deterministic data handling: Dedicated DMA channels and FIFOs for Ethernet and USB improve throughput and offload CPU cycles for application processing.
• Imaging-capable interface: Native image sensor support with 12-bit data and BT.601/656 signaling streamlines integration of camera modules.
• Industrial robustness: Industrial-grade operating temperature range (−40 °C to 85 °C) and a compact 217-LFBGA package support deployment in demanding environments.
• Developer-ready features: EmbeddedICE, debug communication channels and a comprehensive system controller accelerate bring-up and debug.

Why Choose AT91SAM9G20B-CU?

The AT91SAM9G20B-CU delivers a balanced combination of processor performance, peripheral integration and industrial robustness. Its Arm926EJ-S core at 400 MHz, integrated networking and USB capabilities, and versatile external bus interface make it well suited for embedded systems that require connectivity, imaging and flexible memory options.

This device is a practical choice for engineers designing industrial networking equipment, imaging modules, USB-enabled peripherals and control/HMI systems that need a compact, integrated MPU with comprehensive system control and debug facilities.

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