Microchip Technology ATSAMA5D22B-CN

Overview

ATSAMA5D22B-CN 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, QSPI, SDMMC, and LCD TFT controller - deployed in industrial HMI, secure IoT gateways, and point-of-sale terminals.

For engineers reviewing the ATSAMA5D22B-CN datasheet, ATSAMA5D22B-CN pinout, ATSAMA5D22B-CN application, or ATSAMA5D22B-CN equivalent, this page delivers verified technical context, exact package mapping (256-ball TFBGA, 8×8 mm², 0.4 mm pitch), confirmed low-power modes (ULP0/ULP1/Backup), validated peripheral count (105 I/Os, 2 CAN-FD, 10 UART/FLEXCOM), and real-world security features including tamper detection, on-the-fly DDR/QSPI encryption, and IEC 60730 Class B–ready clock monitoring.

Technical Context

The ATSAMA5D22B-CN implements a full Armv7-A architecture with MMU, NEON SIMD engine, and floating-point unit for Linux-capable embedded applications. It integrates dual 16-channel XDMAC controllers, a 4-layer LCDC supporting 1024×768 RGB, and an Image Sensor Controller (ISC) for up to 5-Mpixel parallel sensors - all coordinated via a multilayer bus matrix with TrustZone-secured memory partitioning.

Its system-level timing includes three PLLs (system, USB, audio), programmable clocks (PCK0–2), and dual RC oscillators (12 MHz, 32 kHz), enabling precise clock domain isolation for secure boot, real-time audio, and deterministic Ethernet AVB operation with IEEE 802.1AS timestamping and IEEE 1588 PTP hardware support.

Key Specifications

Pinout & Package

ATSAMA5D22B-CN 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 profile - optimized for compact industrial PCB layouts and thermal performance in extended temperature (-40°C to +105°C) operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Arm Cortex-A5 MPU applications.

Compared with ATSAMA5D22B-CN, ATSAMA5D27B-CN adds environmental sensing and die shielding for mission-critical security, while ATSAMA5D24B-CN reduces I/O count and removes AESB to lower BOM cost - making ATSAMA5D22B-CN the optimal balance of security, connectivity, and footprint for mid-tier industrial edge devices.

Availability

ATSAMA5D22B-CN is available at Aetrix Electronics and suitable for industrial HMIs, secure IoT gateways, and point-of-sale terminals requiring stable component supply, long-term lifecycle assurance, and qualified extended-temperature operation (-40°C to +105°C).

Supply support for ATSAMA5D22B-CN 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 is a global semiconductor company delivering microcontrollers, analog, FPGA, and security solutions with emphasis on reliability, longevity, and embedded system integration.

The SAMA5D2 series is Microchip's ultra-low-power, security-focused Arm Cortex-A5 MPU product line designed for Linux-capable industrial, IoT, and human-machine interface applications demanding hardware-enforced trust, cryptographic acceleration, and deterministic real-time peripherals.

FAQ

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

The ATSAMA5D22B-CN operates at up to 500 MHz on its Arm Cortex-A5 core. This frequency is sustained under typical conditions with appropriate thermal management and power delivery. The device also supports dynamic voltage and frequency scaling (DVFS) through its Power Management Controller (PMC), allowing runtime adjustment to balance performance and power consumption in applications like battery-powered gateways or fanless HMIs. ATSAMA5D22B-CN maintains full peripheral functionality across its rated frequency range.

Does the ATSAMA5D22B-CN support CAN FD, and what are its limitations?

Yes, the ATSAMA5D22B-CN integrates two MCAN controllers supporting CAN FD frame formats. However, it implements the non-ISO CAN FD specification and does not pass the ISO 16845-1:2016 conformance test. This means it is suitable for proprietary or Microchip-ecosystem CAN FD networks but may not interoperate with ISO-compliant CAN FD transceivers in standards-critical automotive or industrial settings. ATSAMA5D22B-CN provides SRAM-based mailboxes and time-triggered transmission for deterministic scheduling.

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

The ATSAMA5D22B-CN includes hardware-based security features such as Arm TrustZone, on-the-fly AES-128/192/256 encryption for DDR/QSPI, SHA-1/224/256/384/512 accelerators, NIST-compliant TRNG, 5 KB of tamper-responsive scrambled SRAM, 8 dedicated tamper pins (PIOBU), Integrity Check Monitor (ICM) for memory verification, and a secure bootloader in masked ROM. These features collectively enable secure boot, encrypted firmware storage, runtime integrity checking, and physical intrusion detection - all without software overhead. ATSAMA5D22B-CN leverages these to meet IEC 60730 Class B and PCI PTS requirements.

Which package type and pin count does the ATSAMA5D22B-CN use?

The ATSAMA5D22B-CN 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. It provides 105 general-purpose I/O lines, each configurable for up to eight peripheral functions or GPIO use. This package is pin-compatible with other SAMA5D22 variants and supports reflow soldering per IPC-J-STD-020. ATSAMA5D22B-CN's TFBGA footprint balances density, thermal performance, and manufacturability for industrial PCBs.

What low-power modes are supported by the ATSAMA5D22B-CN, and how do they differ?

The ATSAMA5D22B-CN supports three software-selectable low-power modes: Idle (CPU halted, peripherals active), Ultra-Low-Power (ULP0/ULP1 with sub-10 µA current and partial asynchronous wake-up), and Backup (RTC + 5 KB SRAM + wake logic active at <1 µA, DDR in self-refresh). ULP1 stops all clocks except RTC and wake sources; Backup mode retains full state with zero data loss. ATSAMA5D22B-CN enables fast wake-up (<10 µs from ULP0, <100 µs from Backup) using PIOBU pins, UART RX, or analog comparators - critical for responsive industrial sensors and battery-operated devices.