ATSAMA5D31A-CFU - ARM Cortex-A5 MPU 536MHz | Microchip
N.º de pieza: ATSAMA5D31A-CFU ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $17.42 | $17,42 |
| 10 | $15.68 | $156,80 |
| 100 | $13.97 | $1.397,00 |
| 500 | $12.45 | $6.225,00 |
| 1.000 | $11.86 | $11.860,00 |
ATSAMA5D31A-CFU Descripción general
An ARM Cortex-A5 MPU is a microprocessor that executes the 32-bit ARMv7-A instruction set under a full operating system (typically Linux), distinguishing it from a microcontroller (MCU) which runs bare-metal or RTOS firmware. Within the SoC hierarchy, this part sits as an MPU -> applications processor -> embedded processor -> semiconductor. The Cortex-A5 core delivers higher compute density than Cortex-M MCUs while retaining deterministic interrupt behaviour, making it suitable for HMIs, gateways, and edge nodes that need graphical or network stacks.
Key features of the ATSAMA5D31A-CFU include 536 MHz maximum CPU clock, hardware floating-point unit (FPU), dual 32 KB L1 caches, 128 KB SRAM, 160 KB boot ROM, an LCD controller supporting TFT displays up to WXGA, a 12-bit ADC, dual Ethernet GMAC with 1588 PTP, dual CAN, USB 2.0 high-speed host and device, and DDR2/LPDDR memory controller. The "-CFU" suffix denotes the industrial temperature grade (-40C to +85C) and TFBGA-324 package, distinguishing it from commercial-grade (-CU) variants.
The architecture integrates a multilayer bus matrix connecting the Cortex-A5 subsystem, SRAM, ROM, and a peripheral bridge to high-bandwidth interfaces (HSMCI, EMAC, USB, LCD, ISI). Hardware encryption is optionally supported through the AES/TDES/SHA crypto block on pin-compatible SAMA5D3 siblings, enabling secure boot and TLS acceleration in connected products. The 160 KB boot ROM contains pre-programmed Atmel/Microchip bootstrap firmware supporting NAND, SD card, SPI flash and serial boot modes.
Typical applications include industrial IoT gateways, building automation HMIs, smart-home controllers, point-of-sale terminals, human-machine interfaces with LCD, medical data loggers, fleet-management telematics, and edge-compute nodes running embedded Linux. The combination of Cortex-A5 compute, integrated FPU, LCD controller, and industrial temperature range suits it to graphical HMI panels and Linux-driven control boxes.
When designing with the ATSAMA5D31A-CFU, plan for a multi-rail power design (typically 1.2V core, 1.8V DDR, 3.3V IO) and a JTAG/SWD debug path. The TFBGA-324 package requires multi-layer PCB with microvia stackups and controlled-impedance routing for DDR2; reference the SAMA5D3 XULT evaluation kit and Microchip application note AT09332 for validated schematics and Linux BSP boot time.
This page synthesizes distributor pricing, drop-in SAMA5D3 family alternatives, and reference design notes not found in the manufacturer datasheet alone.
Alternativas directas para ATSAMA5D31A-CFU — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATSAMA5D31A-CFU (mismo factor de forma y huella) — difiere en Package, Ethernet, USB, LCD Controller, Core Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATSAMA5D31A-CUR
✅ Sustitución directa✓ En stock
$12.85 / unidad
Ver hoja de datos →ATSAMA5D35A-CUR
✅ Sustitución directa✓ En stock
$15 / unidad
Ver hoja de datos →ATSAMA5D36A-CU
✅ Sustitución directa✓ En stock
$46.1 / unidad
Ver hoja de datos →ATSAMA5D33A-CU
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$8.95 / unidad
Ver hoja de datos →ATSAMA5D34A-CU
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$9.62 / unidad
Ver hoja de datos →ATSAMA5D31A-CFUR
✅ Sustitución directa✓ En stock
$11.65 / unidad
Ver hoja de datos →ATSAMA5D31A-CFU Valores máximos y características eléctricas
| Core Architecture | ARM Cortex-A5 (32-bit) |
| Core Count | 1 |
| Maximum CPU Clock | 536 MHz |
| Floating Point Unit | Yes (hardware FPU) |
| L1 Instruction Cache | 32 KB |
| L1 Data Cache | 32 KB |
| Internal SRAM | 128 KB |
| Boot ROM | 160 KB |
| Instruction Set | ARMv7-A |
| Encapsulado | 324-TFBGA (15x15 mm) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +85C (industrial grade) |
| Tensión de alimentación | 1.2 V core / 1.8 V DDR2 / 3.3 V IO (multi-rail) |
| Memory Controller | DDR2 / LPDDR / LPDDR2 (16-bit, up to 128 MB) |
| LCD Controller | Yes, up to WXGA TFT |
| Ethernet | 2x GMAC with IEEE 1588 PTP |
| USB | 2x USB 2.0 High-Speed (Host + Device) |
| CAN | 2x CAN 2.0B |
| Estado RoHS | Compliant (Green, Pb-free) |
Guía de configuración de pines de ATSAMA5D31A-CFU 324-tfbga (15x15 mm)
Configuración de pines para ATSAMA5D31A-CFU (encapsulado 324-tfbga (15x15 mm)). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para ATSAMA5D31A-CFU.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ATSAMA5D31A-CFU es adecuado para 6 aplicacións: Industrial IoT Gateway, Human-Machine Interface (HMI) Panel, Building Automation Controller, Point-of-Sale (POS) Terminal, Medical Data Logger / Patient Monitor, Smart-Home Edge Gateway.
Industrial IoT Gateway
The ATSAMA5D31A-CFU fits industrial IoT gateways because its 536 MHz Cortex-A5 core with FPU runs full Linux, MQTT, and TLS stacks while the dual GMAC with IEEE 1588 PTP delivers deterministic Ethernet for protocol bridging. The industrial temperature grade (-40C to +85C) tolerates factory-floor heat. The DDR2 controller supports 128 MB of low-power RAM, and the dual CAN ports interface with legacy PLCs. Engineers typically pair this MPU with a sub-GHz or Wi-Fi module, an external SPI flash for filesystem, and 4G LTE for cloud uplink, using the 160 KB boot ROM to bootstrap a Yocto Linux image from NAND.
Recomendado
Human-Machine Interface (HMI) Panel
For HMI panels with TFT LCDs up to WXGA resolution, the ATSAMA5D31A-CFU's integrated LCD controller, 2D graphics acceleration, and 128 KB SRAM drive Qt/Embedded or LVGL UIs without an external GPU. The 536 MHz Cortex-A5 with FPU handles 60 fps refresh at 1024x768 with alpha blending, while the 12-bit ADC reads backlight current and touch-panel coordinates. Compared to microcontroller-only solutions, the Cortex-A5 core provides a full POSIX environment for HTML5 web UIs. The TFBGA-324 package and -40C to +85C range suit sealed front-panel mounting.
Recomendado
Building Automation Controller
The ATSAMA5D31A-CFU powers building-automation controllers because its dual CAN buses interface with BACnet, KNX, or Modbus fieldbus networks, while the dual Ethernet MACs segregate fieldbus and IP traffic. The Cortex-A5 runs protocols such as MQTT-SN, BACnet/IP, and OPC UA. The 536 MHz clock with FPU handles cryptographic handshakes for TLS-secured remote access, and the industrial temperature grade meets HVAC panel requirements. The 128 KB SRAM plus external DDR2 supports multi-protocol stacks simultaneously, and the 12-bit ADC monitors analog sensors.
Recomendado
Point-of-Sale (POS) Terminal
POS terminals use the ATSAMA5D31A-CFU because its 536 MHz Cortex-A5 runs full Android or Linux POS stacks, while the integrated LCD controller drives customer-facing and cashier TFT displays. The USB 2.0 high-speed ports connect barcode scanners, receipt printers, and customer displays. The hardware FPU accelerates encryption for EMV chip-card transactions, and the industrial temperature grade tolerates retail environments. Engineers typically pair this MPU with a Secure Access Module (SAM) slot via SPI and an Ethernet PHY for payment-network connectivity.
Recomendado
Medical Data Logger / Patient Monitor
The ATSAMA5D31A-CFU fits medical data loggers because the 536 MHz Cortex-A5 with FPU runs signal-processing algorithms for ECG, SpO2, and temperature waveforms, while the 12-bit ADC digitizes sensor outputs at clinical sampling rates. The dual CAN buses interface with hospital asset-tracking networks, and the LCD controller drives bedside TFT displays. The industrial temperature grade and Microchip's longevity program suit regulated medical-device lifecycles. Engineers add a Wi-Fi/BLE module for HL7 data export and use the boot ROM to enforce signed firmware images.
Recomendado
Smart-Home Edge Gateway
Smart-home edge gateways benefit from the ATSAMA5D31A-CFU's Cortex-A5 running Matter, Thread border router, or Zigbee hub stacks in parallel with a Linux user interface. The dual GMAC separates WAN and LAN, while the dual USB 2.0 high-speed ports host external radios. The 128 KB internal SRAM plus DDR2 supports concurrent protocol translation, and the -40C to +85C range meets wall-mounted enclosure thermal budgets. Engineers typically load the application from SPI NOR flash via the 160 KB boot ROM.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATSAMA5D31A-CFU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATSAMA5D31A-CUR | ATSAMA5D35A-CUR | ATSAMA5D36A-CU | ATSAMA5D33A-CU | ATSAMA5D31A-CFUR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 324-TFBGA (15x15 mm) | 324-TFBGA (15x15 mm) - same | 324-TFBGA (15x15 mm) - same | 324-TFBGA (15x15 mm) - same | 324-TFBGA (15x15 mm) - same | 324-TFBGA (15x15 mm) - same |
| Core | ARM Cortex-A5, 1 core | ARM Cortex-A5, 1 core | ARM Cortex-A5, 1 core | ARM Cortex-A5, 1 core | ARM Cortex-A5, 1 core | ARM Cortex-A5, 1 core |
| Max CPU Clock | 536 MHz | 536 MHz | 536 MHz | 536 MHz | 536 MHz | 536 MHz |
| Internal SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Commercial | Commercial | Industrial |
| Ethernet | 2x GMAC with 1588 PTP | 2x GMAC with 1588 PTP | 2x GMAC with 1588 PTP | 2x GMAC with 1588 PTP | 1x GMAC | 2x GMAC with 1588 PTP |
Diferenciadores clave
- Industrial temperature grade in the same TFBGA package as commercial siblings (frente a ATSAMA5D36A-CU)
- Single-cost Cortex-A5 with hardware FPU (frente a ATSAMA5D35A-CUR)
- 128 KB internal SRAM without external memory for boot-time tasks (frente a ATSAMA5D33A-CU)
- Dual GMAC with IEEE 1588 PTP precision time stamping (frente a ATSAMA5D33A-CU)
Notas de diseño
The ATSAMA5D31A-CFU requires a multi-rail power design: 1.2V for the Cortex-A5 core (capable of ~500 mA peak at 536 MHz), 1.8V for the DDR2/LPDDR2 controller and PHY, and 3.3V for IO and analog blocks. Use a sequenced power-up with the 1.2V rail last so that IO lines are not driven before the core is alive; the SAMA5D3 reference schematic uses a TPS65217 or equivalent PMIC. Estimated total power at full load is approximately 1.5W worst case, requiring attention to thermal dissipation even at industrial temperatures.
The 324-TFBGA package at 0.8 mm ball pitch demands a microvia stack-up (typically 4-6 layers, laser-drilled microvias) and impedance-controlled DDR2 traces (50 ohm single-ended, 100 ohm differential for clock). Reference the SAMA5D3 XULT evaluation kit for validated routing. Maintain a continuous ground plane under the BGA to provide a low-impedance return path and to spread heat. Decoupling: place 100 nF X7R caps within 2 mm of every VDDCORE/VVDDIO power ball and one 4.7 uF bulk cap per rail.
Estimated: at 1.2V core voltage, 536 MHz, full peripheral activity, the part dissipates ~1.5 W. The 324-TFBGA has theta_JA approximately 25-30 C/W on a 4-layer JEDEC test board, yielding a junction temperature rise of ~40-45 C above ambient. For -40C to +85C operation, ensure ambient stays below ~45 C under full load, or attach a thermal pad and heatsink. The exposed die pad (if present on the package bottom) must be soldered to a copper pour to maximize heat spreading.
Do not assume DDR2 timing is automatic - the SPD/EWlite byte-programmable DDR2 controller must be calibrated via the bootstrap loader for the chosen memory chip. Booting fails silently if the boot ROM cannot detect a valid image; ensure the BMS (Boot Mode Select) pins are correctly pulled at reset. Watchdog timer must be enabled in production firmware to recover from Linux kernel panics. Always validate the JTAG/SWD debug chain with an external programmer before sealing the enclosure.
Información de cumplimiento
RoHS compliant and Pb-free per Microchip product page (BGA, GREEN, IND TEMP suffix). Not AEC-Q100 qualified - this is an MPU, not an automotive-grade part. Halogen-free status not explicitly stated in verified data.
