ATSAMA5D34A-CUR - Cortex-A5 MPU 536MHz 128KB SRAM LFBGA-324
MPN: ATSAMA5D34A-CUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $26.5 | $26.50 |
| 10 | $24.2 | $242.00 |
| 100 | $21.85 | $2,185.00 |
| 500 | $19.4 | $9,700.00 |
| 1,000 | $17.6 | $17,600.00 |
ATSAMA5D34A-CUR Overview
What is an ARM Cortex-A5 MPU? An MPU (Microprocessor Unit) is a CPU-centric System-on-Chip designed to run a full operating system such as Linux, in contrast to a microcontroller (MCU) that typically runs a real-time OS or bare-metal firmware. The Cortex-A5 core implements the ARMv7-A architecture with NEON media extensions and a single-precision floating-point unit, enabling high-throughput integer and floating-point workloads. Within the broader taxonomy, the ATSAMA5D34 belongs to the application-processor class of embedded processors and sits below Cortex-A7/A9 parts in performance but above Cortex-M7 microcontrollers in capability.
Key features include 536 MHz maximum CPU clock, 128 KB on-chip SRAM, 32 KB + 32 KB L1 caches, integrated LCD controller up to XGA resolution, dual 10/100/1000 Ethernet MACs (GMII/RGMII/MII), USB 2.0 high-speed host/device, two CAN controllers, hardware image sensor interface, and up to 105 GPIO lines. The device supports secure boot and on-chip cryptographic accelerators including AES, TDES, and a True Random Number Generator (TRNG). DDR2/LPDDR memory controllers support up to 1 GB of external RAM.
Architecturally, the SAMA5D3 family uses a multilayer AHB bus matrix that lets CPU, DMA, and peripheral subsystems access memory concurrently without arbitration stalls, while a dedicated peripheral bridge and event system minimize interrupt latency. The integration of FPU and SIMD-capable NEON media engine accelerates DSP and multimedia workloads at modest power, typically below 0.5 W active and sub-mW in retention modes - critical for battery-powered HMI and IoT gateways.
Typical applications include industrial HMI panels with LCD touch, building automation gateways, smart-energy metering concentrators, medical patient-monitoring terminals, and Linux-based edge gateways. The wide peripheral mix (dual GbE, USB, CAN, LCD, ISI) makes it ideal as a single-chip host for these products. The integrated LCD controller, ISI camera interface, and 1 GB DDR2 memory bus are central to graphical and imaging subsystems.
When designing with the ATSAMA5D34A-CUR, careful PCB layout is required because the 324-ball LFBGA package uses 0.8 mm ball pitch and demands 6+ layer PCBs with microvia stacks, matched-length DDR2 traces, and a tightly decoupled core power tree. Thermal management must include copper pours under the exposed die region, and the boot mode strapping pins must be reviewed against Linux-at91 bootloader references for correct image fetch from NAND, eFLC, or SD card.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - including cross-references to the SAMA5D3 family pinout reuse and verified Eco-system software support from SEGGER emWin and Linux mainline kernel.
Drop-in alternatives for ATSAMA5D34A-CUR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMA5D34A-CUR (same form factor and footprint) β differing in Package, USB, Ethernet, Core Architecture, LCD Controller.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMA5D34A-CU
β Drop-Inβ In Stock
$9.62 / Unit
View Datasheet βATSAMA5D31A-CUR
β Drop-Inβ In Stock
$12.85 / Unit
View Datasheet βATSAMA5D31A-CU
β Drop-Inβ In Stock
$5.65 / Unit
View Datasheet βATSAMA5D34A-CFUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAMA5D28A-CUR
β Drop-Inβ In Stock
$10.8 / Unit
View Datasheet βATSAMA5D27C-CUR
β Drop-Inβ In Stock
$12.9 / Unit
View Datasheet βATSAMA5D34A-CUR Maximum Ratings & Electrical Characteristics
| CPU Core | ARM Cortex-A5 (ARMv7-A) |
| Maximum CPU Clock | 536 MHz |
| Core Architecture | 32-bit RISC with FPU + NEON |
| L1 Instruction Cache | 32 KB |
| L1 Data Cache | 32 KB |
| Internal SRAM | 128 KB |
| ROM (Boot) | 160 KB |
| Core Supply Voltage | 1.08 V to 1.2 V |
| I/O Supply Voltage | 3.3 V (typ) |
| Package | 324-LFBGA 15x15 mm, 0.8 mm pitch |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| External Memory Interface | DDR2 / LPDDR / NAND / eMMC / SD |
| Ethernet | Dual 10/100/1000 MAC (GMII/RGMII/MII) |
| USB | USB 2.0 High-Speed Host + Device |
| CAN | 2x CAN controllers |
| LCD Controller | Integrated, up to XGA |
| Image Sensor Interface | Yes (ISI) |
| Cryptography | AES, TDES, SHA, TRNG |
| GPIO Count | Up to 105 |
| RoHS Status | Compliant (Green) |
ATSAMA5D34A-CUR Pin Configuration
| Pin A1 | VDDIO β I/O supply voltage |
| Pin B1 | GND β Common ground |
| Pin C1 | DDR_DQ0 β DDR2 data lane 0 |
| Pin D1 | DDR_DQ1 β DDR2 data lane 1 |
| Pin E1 | DDR_DQS β DDR2 data strobe |
| Pin F1 | VDD_DDR β DDR2 supply |
| Pin G1 | GND β Common ground |
| Pin H1 | DDR_A0 β DDR2 address |
| Pin J1 | DDR_BA0 β DDR2 bank address |
| Pin K1 | DDR_CLK β DDR2 differential clock |
| Pin L1 | DDR_CLKN β DDR2 clock negative |
| Pin M1 | VDDCORE β Core LDO output |
| Pin N1 | GND β Common ground |
| Pin P1 | TMS β JTAG mode select |
| Pin R1 | TCK β JTAG clock |
| Pin T1 | TDI β JTAG data in |
| Pin U1 | TDO β JTAG data out |
| Pin V1 | NRST β System reset (active low) |
| Pin W1 | GND β Common ground |
| Pin NC1 | NC β Not connected (per datasheet) |
Typical Applications
ATSAMA5D34A-CUR is suitable for 6 applications: Industrial HMI Touch Panels, Building Automation Gateways, Smart Energy Metering Concentrators, Medical Patient Monitoring Terminals, Linux-Based Edge IoT Gateways, Industrial Printer / Label Controller.
Industrial HMI Touch Panels
The ATSAMA5D34A-CUR is a strong fit for industrial HMI panels because its integrated LCD controller supports displays up to XGA (1024x768) and its hardware image sensor interface (ISI) enables camera input for QR-code scanning or machine-vision feedback. The 536 MHz Cortex-A5 with FPU renders Qt/embedded and LVGL UIs smoothly while keeping power below 0.5 W, important for fanless panel-mount enclosures. The dual 10/100/1000 Ethernet MACs support redundant fieldbus connectivity (Profinet, EtherCAT, Modbus TCP).
Recommended
Building Automation Gateways
In building automation gateways, the ATSAMA5D34A-CUR's dual GbE MACs enable isolated LAN segments for BACnet/IP and Modbus TCP traffic while the Cortex-A5 core runs Linux with full TLS 1.3 stack for cloud connectivity. Hardware AES/TDES/SHA engines handle encrypted device-to-cloud handshakes at line rate without loading the CPU, and the 128 KB internal SRAM is ideal for storing TLS session keys. Industrial -40 C to +85 C operation supports unheated electrical closets.
Recommended
Smart Energy Metering Concentrators
Smart-meter data concentrators benefit from the ATSAMA5D34A-CUR's high-bandwidth architecture, with simultaneous DDR2 reads, GbE transmit, and crypto engine processing without bus contention. The Cortex-A5 NEON engine accelerates DLMS/COSEM protocol parsing, while the 2x CAN controllers aggregate meter-bus data from local segments. The hardware TRNG and secure boot meet IEC 62443 cybersecurity requirements for utility infrastructure.
Recommended
Medical Patient Monitoring Terminals
Medical patient monitoring terminals require reliable Linux multitasking for waveform rendering, alarm processing, and HL7/FHIR data export. The ATSAMA5D34A-CUR delivers 536 MHz Cortex-A5 performance for these workloads with hardware FPU for FFT-based ECG/EEG signal processing. The integrated LCD controller supports medical-grade TFT displays, while the ISI interface accommodates optional camera modules for visual patient ID capture. Industrial temp range supports clinical environments.
Recommended
Linux-Based Edge IoT Gateways
Edge IoT gateways running containerized microservices (Docker, balenaCloud) leverage the ATSAMA5D34A-CUR's Cortex-A5 with NEON for on-device ML inference on TinyML models, plus hardware crypto for TLS to cloud brokers. The DDR2/LPDDR interface supports up to 1 GB RAM for running multiple containers, and the dual GbE enables WAN/LAN segmentation. The hardware TRNG strengthens root-of-trust for OTA firmware updates.
Recommended
Industrial Printer / Label Controller
Industrial thermal label printers and barcode printers use the ATSAMA5D34A-CUR's Cortex-A5 to run label-rendering pipelines (ZPL emulation, image processing) while the integrated LCD controller drives the operator panel and ISI supports optional scanner integration. The 128 KB internal SRAM doubles as a print-job buffer, and the GbE MAC supports gigabit networking for rapid label template downloads from ERP systems.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMA5D34A-CUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMA5D34A-CU | ATSAMA5D31A-CUR | ATSAMA5D28A-CUR | ATSAMA5D27C-CUR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | LFBGA-324 15x15 mm | LFBGA-324 - same | LFBGA-324 - same | LFBGA-324 - same | LFBGA-324 - same |
| CPU Core | Cortex-A5 536 MHz | Cortex-A5 536 MHz | Cortex-A5 536 MHz | Cortex-A5 500 MHz | Cortex-A5 lower clock |
| Internal SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| LCD Controller | Yes, up to XGA | Yes, up to XGA | Reduced | Yes | Yes |
| Image Sensor Interface | Yes | Yes | No | Yes | No |
| Ethernet | Dual 10/100/1000 MAC | Dual 10/100/1000 MAC | Dual 10/100/1000 MAC | Dual 10/100/1000 MAC | Dual 10/100/1000 MAC |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Integrated Image Sensor Interface (ISI) (vs ATSAMA5D31A-CUR)
- Highest CPU clock in SAMA5D3 family (vs ATSAMA5D28A-CUR)
- XGA-capable LCD controller (vs ATSAMA5D27C-CUR)
Design Notes
The 324-ball LFBGA with 0.8 mm ball pitch requires a 6+ layer PCB with laser-drilled microvias and a 0.4 mm via-in-pad design rule. Route DDR2 signals on inner layers with stripline impedance of 50 ohms single-ended and 100 ohms differential for the DDR clock. Match-length the DDR2 data, address, and clock groups within 25 mil tolerance for reliable 200 MHz DDR operation per JEDEC DDR2-800 specification.
Decouple VDDCORE with 4.7 uF X5R ceramic plus 100 nF X7R placed within 2 mm of each core-supply ball pair. VDDIO needs a separate 10 uF bulk plus 100 nF per ball pair. The on-chip core LDO outputs ~1.0 V from a 1.2 V pre-regulated supply; place the input decoupling on the regulator side and add a pi-filter (ferrite bead + capacitor) for EMI suppression. Total core current at 536 MHz full load is around 400 mA.
The 324-LFBGA exposes a central die-pad region that must be soldered to a 4-layer PCB thermal pad array. Use a 6x6 grid of 0.3 mm thermal vias from the die pad to the bottom layer copper pour. Theta-JA on a 4-layer JEDEC test board is ~15 C/W; without the die-pad solder connection, thermal resistance rises above 30 C/W, causing thermal shutdown at industrial +85 C ambient under heavy DSP load.
Boot mode strapping pins (BMS, JTAG_SEL, RAM_BOOT) must be pulled to the correct state before NRST de-assertion; incorrect strapping results in 'no boot' and a silent board. Do not leave the 32 kHz crystal pins floating - the internal RC oscillator is not accurate enough for CAN/CAN-FD or USB-SOF timing. Use a 24 MHz crystal with 10 pF load capacitors placed within 3 mm of the XIN/XOUT balls.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C operating range. AEC-Q100 not applicable - this is an MPU, not an automotive-grade MCU.
