Microchip Technology ATSAMA5D27B-CU

Overview

ATSAMA5D27B-CU from Microchip Technology is an ultra-low-power Arm Cortex-A5-based microprocessor unit (MPU) operating at up to 500 MHz, featuring dual CAN-FD controllers, 10/100 Ethernet MAC with AVB and IEEE 1588 support, USB high-speed host/device/HSIC interfaces, and hardware crypto acceleration (AES-256, SHA-512, TRNG). It integrates a 12-channel 12-bit ADC with resistive touchscreen capability and supports DDR3L/LPDDR2/LPDDR3 memory for industrial HMI and secure IoT gateway applications.

For engineers reviewing the ATSAMA5D27B-CU datasheet, ATSAMA5D27B-CU pinout, ATSAMA5D27B-CU application, or ATSAMA5D27B-CU equivalent, this page delivers verified technical context, validated package mapping (289-ball LFBGA), confirmed low-power modes (ULP0/ULP1/Backup), real-world security features (TrustZone, tamper detection, on-the-fly AESB), and precise peripheral configuration per SAMA5D27 variant.

Technical Context

The ATSAMA5D27B-CU implements Armv7-A architecture with TrustZone-enabled memory isolation, NEON SIMD engine, and floating-point unit (FPU) for deterministic multimedia and signal processing. Its multilayer bus architecture routes 2 × 16-channel DMA controllers to offload data movement from the CPU core.

It integrates two MCAN controllers compliant with non-ISO CAN FD frame format (not ISO 16845-1:2016 conformant), a GMAC with IEEE 802.1AS timestamping and credit-based traffic shaping (IEEE 802.1Qav), and a configurable 128-Kbyte L2 cache usable as internal SRAM or cache-enabling deterministic real-time response in safety-critical edge nodes.

Key Specifications

Pinout & Package

ATSAMA5D27B-CU is housed in a 289-ball LFBGA package (14×14 mm², 0.8 mm pitch), supporting industrial temperature range (−40°C to +105°C) and featuring 128 I/Os with up to eight peripheral functions per pin. Pin assignments follow the SAMA5D27-specific signal mapping defined in DS60001476H, including dedicated DDR3L/LPDDR3 interface signals (DDR_D[31:0], DDR_A[13:0], DDR_CK/CLKN), dual CANRX/CANTX pairs, and GMAC PHY interface (GTX0–GTX3, GRX0–GRX3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar MPU applications.

Compared with ATSAMA5D26B-CU, the ATSAMA5D27B-CU adds dual CAN-FD, ISC, PTC, and tamper resilience-making it superior for secure, vision-enabled industrial gateways. Against i.MX6ULL, it delivers certified TrustZone, on-die crypto acceleration, and IEEE 1588 hardware timestamping essential for time-sensitive industrial protocols.

Availability

ATSAMA5D27B-CU is available at Aetrix Electronics and suitable for industrial HMI terminals, secure IoT gateways, medical point-of-care devices, smart energy metering hubs, and automotive telematics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ATSAMA5D27B-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 global semiconductor company delivering scalable, secure, and power-efficient embedded solutions for industrial, automotive, and IoT markets.

The SAMA5D2 product line targets high-assurance embedded applications demanding Arm Cortex-A performance with hardware-enforced security, ultra-low-power operation, and rich peripheral integration for human-machine interface and edge intelligence.

FAQ

What is the maximum operating frequency of the ATSAMA5D27B-CU?

The ATSAMA5D27B-CU operates at up to 500 MHz on its Arm Cortex-A5 core. This frequency is sustained under typical thermal conditions with appropriate DDR3L/LPDDR3 memory timing and voltage regulation. The device also includes a 600–1200 MHz system PLL and a dedicated 480 MHz USB PLL to maintain peripheral timing integrity at full CPU speed. ATSAMA5D27B-CU's frequency scaling is managed through the PMC module and supported by Linux cpufreq drivers.

Does the ATSAMA5D27B-CU support ISO 16845-1:2016 CAN FD conformance testing?

No, the ATSAMA5D27B-CU implements MCAN controllers using the non-ISO CAN FD frame format and does not pass the CAN FD Conformance Test per ISO 16845-1:2016. Its MCAN modules support time- and event-triggered transmission with SRAM-based mailboxes but are intended for proprietary or vendor-specific CAN FD networks-not interoperable automotive ECUs requiring ISO compliance. ATSAMA5D27B-CU documentation explicitly warns against assuming ISO conformance.

What memory types does the ATSAMA5D27B-CU support natively?

The ATSAMA5D27B-CU natively supports DDR3L, LPDDR2, LPDDR3, QSPI Flash, e.MMC 4.51, NAND Flash (with up to 32-bit PMECC), and internal 128-Kbyte L2 cache configurable as SRAM. Its DDR controller supports 32-bit data width and "on-the-fly" AESB encryption/decryption for DDR and QSPI memories. ATSAMA5D27B-CU does not support DDR4 or LPDDR4, and DDR2 operation requires DLL-off configuration per DS60001476H.

How many tamper detection pins does the ATSAMA5D27B-CU provide?

The ATSAMA5D27B-CU provides eight dedicated tamper detection pins (PIOBU0–PIOBU7), supporting both static and dynamic intrusion detection. Upon tamper event, 1 KB of secure SRAM becomes nonerasable and 4 KB is erased, while the RTC logs the timestamp. These pins are electrically isolated in Backup mode and can wake the device from ULP1 or Backup states. ATSAMA5D27B-CU's tamper architecture is documented in the SAMA5D2 External Tamper Protections application note.

Is the ATSAMA5D27B-CU qualified for extended industrial temperature operation?

Yes, the ATSAMA5D27B-CU is qualified for extended industrial temperature operation from −40°C to +105°C ambient. This rating applies specifically to the 289-ball LFBGA package variant and is validated per Microchip's qualification standards. The device includes internal temperature monitoring, voltage/frequency monitors, and active die shield (on select versions) to sustain reliability across this range. ATSAMA5D27B-CU's thermal design guidance is detailed in the SAMA5D2 Thermal Design Guide.