Microchip Technology ATSAMA5D24A-CU

Overview

ATSAMA5D24A-CU from Microchip Technology is an ultra-low-power Arm Cortex-A5 microprocessor unit (MPU) operating at up to 500 MHz, featuring dual CAN-FD controllers, 10/100 Ethernet MAC with IEEE 1588 PTP support, LCD TFT controller (up to 1280×768), and hardware crypto accelerators (AES-256, SHA-256, TRNG). It integrates 128 KB L2 cache configurable as SRAM, 128 KB scrambled internal SRAM, and supports DDR3L/LPDDR3 memory for industrial HMI and secure IoT gateway applications.

For engineers reviewing the ATSAMA5D24A-CU datasheet, ATSAMA5D24A-CU pinout, ATSAMA5D24A-CU application, or ATSAMA5D24A-CU equivalent, key selection considerations include its dual MCAN controllers (non-ISO CAN FD), extended industrial temperature rating (–40°C to +105°C), TrustZone-enabled secure boot, and 196-ball TFBGA package with 128 I/Os supporting multiplexed FLEXCOM, QSPI, and SDMMC interfaces.

Technical Context

The ATSAMA5D24A-CU implements Armv7-A architecture with NEON SIMD engine and VFPv4 floating-point unit, enabling real-time multimedia processing and deterministic control. Its multilayer bus architecture includes two 16-channel XDMAC controllers and dedicated peripheral DMAs to sustain high-bandwidth transfers across EMAC, USB, ISC, and LCDC without CPU intervention.

Security is enforced via Arm TrustZone partitioning, 5 KB tamper-protected SRAM (1 KB nonerasable), 8 tamper detection pins, on-the-fly AES encryption for DDR/QSPI, and Integrity Check Monitor (ICM) using SHA-256 to validate memory integrity. Low-power operation includes ULP0/ULP1 modes with partial asynchronous wake-up and Backup mode with DDR self-refresh.

Key Specifications

Pinout & Package

ATSAMA5D24A-CU is housed in a 196-ball Thin Fine-Pitch Ball Grid Array (TFBGA) package measuring 11 mm × 11 mm with 0.75 mm ball pitch and 0.75 mm thickness, optimized for industrial thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ATSAMA5D24A-CU, ATSAMA5D27A-CU expands touch and monitoring capabilities at the cost of package size and layout compatibility, while i.MX6ULL trades security depth and dual CAN-FD for higher clock speed and broader ecosystem support-neither offers drop-in replacement capability.

Availability

ATSAMA5D24A-CU is available at Aetrix Electronics and suitable for industrial HMI gateways, secure edge IoT nodes, medical imaging terminals, and ruggedized POS terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ATSAMA5D24A-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 is a leading provider of microcontrollers, analog components, and Flash-IP solutions, delivering secure, low-power, and highly integrated semiconductor products for industrial, automotive, and IoT markets.

The SAMA5D2 product line was designed specifically for secure, ultra-low-power embedded applications demanding Arm Cortex-A performance with hardware-enforced trust, including industrial HMIs, medical edge devices, and certified payment terminals.

FAQ

What is the maximum operating temperature range for the ATSAMA5D24A-CU?

The ATSAMA5D24A-CU is qualified for extended industrial temperature operation from –40°C to +105°C ambient, verified per Microchip's qualification standards and supported by thermal design guidelines in the DS60001476H datasheet. This rating applies specifically to the 196-ball TFBGA variant and enables deployment in harsh environments such as factory automation cabinets and outdoor kiosks without derating.

Does the ATSAMA5D24A-CU support ISO-compliant CAN FD?

No-the ATSAMA5D24A-CU implements MCAN controllers using the non-ISO CAN FD frame format and does not pass the ISO 16845-1:2016 conformance test. It supports CAN FD data rates up to 8 Mbps and features SRAM-based mailboxes with time-triggered transmission, but interoperability with ISO-standard CAN FD networks requires protocol translation or external transceivers.

How is secure boot implemented on the ATSAMA5D24A-CU?

The ATSAMA5D24A-CU executes a ROM-resident secure bootloader that validates digital signatures of first-stage firmware using RSA-2048 or ECDSA-256 before loading into internal SRAM. The process enforces TrustZone isolation, disables debug interfaces upon failure, and leverages the 64-bit SAIC to prevent privilege escalation-details are specified in the SAMA5D2 Series Secure Boot Strategy document under NDA.

Which power management ICs are recommended for the ATSAMA5D24A-CU?

Microchip recommends the MCP16501A and MCP16502AA PMICs for ATSAMA5D24A-CU designs. Both provide pin-selectable VDDIODDR (1.2 V / 1.35 V / 1.8 V) to match DDR3L/LPDDR3 memory, leakage-free I²C control in Backup mode, and dedicated rails for VDDCORE, VDDIOP, and VDDFUSE. The MCP16502AA adds a fourth buck regulator for auxiliary loads.

Can the ATSAMA5D24A-CU's L2 cache be used as general-purpose SRAM?

Yes-the ATSAMA5D24A-CU's 128 KB L2 cache is configurable via the L2CC register to operate either as cache for the Cortex-A5 core or as tightly coupled SRAM. When configured as SRAM, it provides deterministic zero-wait-state access for real-time tasks such as interrupt service routines or safety-critical buffers, with full ECC protection enabled.