ATSAMA5D28B-CU

The ATSAMA5D28B-CU is an ARM® Cortex®-A5 based 32-bit microprocessor running at 500 MHz in a 289-LFBGA (14×14) surface-mount package. Designed for embedded applications, it combines a single Cortex-A5 core, multimedia acceleration and a broad set of integrated peripherals to support connectivity and user‑interface oriented designs.

This industrial-grade MPU emphasizes integration, security and low-power operation while supporting multiple memory types and a delivered software ecosystem including a free Linux distribution and bare-metal C examples.

Key Features

• Core ARM Cortex-A5 single-core, 32-bit processor at 500 MHz with NEON™ Media Processing Engine and optional ETM/ETB support.
• Memory Support Flexible memory controllers for LPDDR1/LPDDR2/LPDDR3, DDR2, DDR3, DDR3L and QSPI flash; internal 128 KB scrambled SRAM, 160 KB internal ROM and configurable 128 KB L2 cache/ SRAM.
• Security Hardware security features including ARM TrustZone®, boot security, cryptography (AES, SHA), true random number generator (TRNG), secure fusebox, secure JTAG, secure memory and secure RTC.
• Peripherals & Timers Integrated reset controller, independent watchdog, periodic interval timer, secure RTC with calibration, and up to 51 DMA channels for high-throughput peripheral handling.
• Graphics & Multimedia LCD TFT controller supporting up to 1024×768 with overlays, rotation and alpha blending; image sensor controller (ISC) supporting up to 5 M-pixel sensors and post-processing capabilities.
• Audio & Touch Peripheral Touch Controller (PTC) for capacitive touch, I2S and audio PLLs with dedicated fractional PLL support for common audio sample rates.
• Connectivity 10/100 Mbps Ethernet MAC (GMAC), USB 2.0 with HSIC support, and standard interfaces such as I2C for system integration.
• System & Clocks Multiple PLLs (system and USB), internal RC oscillators, selectable 32.768 kHz low-power oscillator and programmable external clock inputs.
• Low-Power Modes Ultra low-power modes with fast wakeup, backup mode with retained SRAM and extended backup with DDR self-refresh; SleepWalking™ features for reduced runtime power.
• Package & Environmental 289-LFBGA (14×14) surface-mount package; industrial operating temperature range of −40 °C to 105 °C and RoHS compliant.

Typical Applications

• Industrial HMI Drive graphical displays, touch interfaces and local control logic with the integrated TFT controller, PTC and multimedia acceleration at industrial temperatures.
• Multimedia Terminals Support image sensors, audio interfaces and frame buffers for kiosks, POS terminals and other user-facing devices using the ISC, audio controllers and NEON MPE.
• Secure Embedded Gateways Implement secure boot, cryptographic operations and network connectivity for edge devices and gateways using ARM TrustZone, AES/SHA engines and 10/100 Ethernet.
• Embedded Linux Systems Deploy Linux-based applications with the delivered free Linux distribution and bare-metal C examples, leveraging broad memory and peripheral support.

Unique Advantages

• Integrated security stack: ARM TrustZone, secure boot, hardware AES/SHA and TRNG provide a hardware-rooted security foundation for protected systems.
• Memory flexibility: Support for LPDDR1/2/3, DDR2/3/3L and QSPI flash lets designs choose the optimal memory type and density without changing the MPU.
• Rich multimedia and sensor support: On-chip LCD TFT controller, image sensor controller up to 5 M-pixel and NEON MPE accelerate UI and vision tasks.
• Low-power design features: Multiple low-power modes, fast wakeup and backup SRAM reduce runtime and standby power for energy-sensitive applications.
• Comprehensive peripheral set: Integrated Ethernet, USB 2.0/HSIC, I2C, audio interfaces and many DMA channels simplify BOM and system design.
• Industrial readiness: Industrial temperature rating (−40 °C to 105 °C) and a compact 289-LFBGA package support deployment in harsh environments.

Why Choose ATSAMA5D28B-CU?

The ATSAMA5D28B-CU positions itself as a highly integrated, secure and flexible MPU for embedded designs that require multimedia, connectivity and trusted operation. Its Cortex-A5 core at 500 MHz, broad memory support and extensive peripheral set reduce system complexity while the hardware security and low-power modes address modern embedded requirements.

This part is well suited to engineers building industrial HMIs, multimedia terminals, secure gateways and Linux‑based embedded systems where long-term availability, scalability and vendor-backed software examples are important.

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