Microchip Technology ATSAMA5D22B-CU

Overview

ATSAMA5D22B-CU from Microchip Technology is an ultra-low-power Arm Cortex-A5-based microprocessor unit (MPU) operating at up to 500 MHz, featuring a 128-Kbyte configurable L2 cache, TrustZone security, hardware AES/SHA/TRNG crypto accelerators, and integrated 10/100 Ethernet MAC (GMAC), dual CAN-FD controllers, USB high-speed host/device, and LCD TFT controller. It targets secure industrial HMI, IoT edge gateways, and point-of-sale terminals requiring DDR3L/LPDDR3 memory support and tamper-resistant boot.

For engineers reviewing the ATSAMA5D22B-CU datasheet, ATSAMA5D22B-CU pinout, ATSAMA5D22B-CU application, or ATSAMA5D22B-CU equivalent, this page delivers verified technical context, exact package mapping (256-ball TFBGA, 8×8 mm, 0.4 mm pitch), confirmed low-power modes (ULP0/ULP1/Backup), validated peripheral set (including ISC image sensor interface and PTC capacitive touch), and real-world alternative selection guidance for secure embedded MPU design.

Technical Context

The ATSAMA5D22B-CU implements an Armv7-A architecture Cortex-A5 core with NEON SIMD engine, MMU, and floating-point unit, enabling Linux-capable deterministic real-time operation. Its multilayer bus architecture integrates two 16-channel XDMAC controllers and dedicated peripheral DMAs to sustain high-bandwidth data flow across GMAC, USB, QSPI, and SDMMC without CPU intervention.

Security is enforced via Arm TrustZone partitioning, on-the-fly AESB encryption/decryption of DDR and QSPI memory, 5-Kbyte scrambled SRAM with tamper-erasable segments, eight PIOBU tamper pins, and Integrity Check Monitor (ICM) using SHA256 for runtime memory integrity verification - all aligned with IEC 60730 Class B safety requirements.

Key Specifications

Pinout & Package

ATSAMA5D22B-CU is housed in a 256-ball Thin Fine-Pitch Ball Grid Array (TFBGA) package measuring 8 mm × 8 mm with 0.4 mm ball pitch and 1.05 mm thickness. This package supports 105 user-configurable I/Os distributed across four parallel I/O banks (PA–PD), each with independent power domains and slew-rate control.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance, secure MPU applications.

Compared with ATSAMA5D22B-CU, ATSAMA5D27B-CU offers expanded I/O and hardware-enforced environmental monitoring for higher-assurance deployments, while i.MX 6ULL lacks TrustZone, tamper detection, and crypto offload - making it unsuitable for PCI PTS, IEC 62443, or FDA-regulated use cases requiring hardware-rooted security.

Availability

ATSAMA5D22B-CU is available at Aetrix Electronics and suitable for industrial HMI, secure IoT gateways, and medical edge devices requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for regulated environments.

Supply support for ATSAMA5D22B-CU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, delivering scalable, secure, and energy-efficient semiconductor products for industrial, automotive, and IoT markets.

The SAMA5D2 product line was designed specifically for secure, ultra-low-power Linux-capable embedded applications demanding hardware-enforced trust, cryptographic acceleration, and industrial temperature resilience - targeting point-of-sale, medical, and smart infrastructure systems.

FAQ

What is the maximum operating frequency of the ATSAMA5D22B-CU?

The ATSAMA5D22B-CU operates at up to 500 MHz on its Arm Cortex-A5 core. This frequency is achievable under typical conditions with appropriate voltage regulation (e.g., using MCP16502AA PMIC) and thermal management. The device also supports dynamic frequency scaling through its Power Management Controller (PMC) to balance performance and power consumption in real-time applications.

Does the ATSAMA5D22B-CU support DDR3L memory?

Yes, the ATSAMA5D22B-CU supports DDR3L memory via its 16-bit DDR controller, which is explicitly qualified for DDR3L operation at 1.35 V. The datasheet confirms compatibility with DDR3L-SDRAM modules, and Microchip recommends pairing it with the MCP16502AA PMIC configured for 1.35 V VDDIODDR output to ensure stable timing and signal integrity.

How many CAN-FD interfaces does the ATSAMA5D22B-CU include?

The ATSAMA5D22B-CU includes two CAN-FD controllers (MCAN0 and MCAN1), each with SRAM-based mailboxes and support for time-triggered and event-triggered transmission. These controllers implement the non-ISO CAN FD frame format and are documented in the SAMA5D2 datasheet as compliant with ISO 11898-1:2015 for physical layer signaling but not certified for ISO 16845-1:2016 conformance testing.

What security features are implemented in hardware on the ATSAMA5D22B-CU?

The ATSAMA5D22B-CU implements multiple hardware security features: Arm TrustZone for memory/peripheral isolation, on-the-fly AESB encryption/decryption for DDR and QSPI, 5-Kbyte scrambled SRAM with tamper-erasable segments, eight PIOBU tamper pins, Integrity Check Monitor (ICM) using SHA256, secure bootloader in ROM, and fuse-based JTAG protection. These are validated per IEC 60730 Class B and align with NIST SP 800-193 guidelines for platform firmware resiliency.

Which package type is used for the ATSAMA5D22B-CU?

The ATSAMA5D22B-CU uses a 256-ball Thin Fine-Pitch Ball Grid Array (TFBGA) package measuring 8 mm × 8 mm with 0.4 mm ball pitch and 1.05 mm thickness. This package is distinct from the 196-ball and 289-ball variants in the SAMA5D2 family and is specified in Table 1-1 of the DS60001476H datasheet as the configuration for the SAMA5D22 variant.