ATSAM4C32CA-AUTR - Dual-Core 120MHz 2MB Flash MCU | Microchip
MPN： ATSAM4C32CA-AUTR ✓ 啟用中ATSAM4C32CA-AUTR 概覽
A microcontroller (MCU) is a complete computing system on a single chip, combining a processor core, memory, and peripherals. Within the power-management hierarchy, the SAM4C family sits above simple single-core MCUs: it integrates two ARM Cortex-M4 RISC processors, allowing one core to run the main application while the second handles communication, metering calculations, or security tasks, effectively replacing a discrete coprocessor.
Key differentiating features include the dual-core Cortex-M4 architecture (with floating-point unit, i.e., Cortex-M4F support), 2 MB (2M x 8) of on-chip flash for dual-bank firmware images, hardware cryptographic acceleration (per the Mouser designation CRYPTO), and industrial temperature qualification. These attributes directly target three-phase electricity metering and secure IoT endpoints.
Technically, each Cortex-M4 core executes at up to 120 MHz, delivering high single-cycle DSP performance with hardware divide and SIMD instructions. The flash density supports large RTOS-based stacks such as FreeRTOS and dual-image OTA upgrades. The crypto engine offloads AES and related algorithms from software, reducing CPU load and improving side-channel resistance for billing-grade security.
Typical applications include smart energy meters, data concentrators in smart-grid infrastructure, secure industrial gateways, and IoT sensor hubs requiring both compute headroom and cryptographic protection. The dual-core design isolates metering firmware from network stacks for improved robustness.
Design consideration: confirm the exact SRAM size, peripheral set, and pinout from the official Microchip ATSAM4C32 datasheet before layout, and verify land pattern dimensions against the 14x14 mm LQFP-100 footprint.
This page synthesizes distributor pricing (as of 2026-09-20), drop-in same-family alternatives, and practical design guidance not found in the manufacturer datasheet alone.
直接替換替代品，適用於 ATSAM4C32CA-AUTR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAM4C32CA-AUTR （相同外形與佔位） — 差異在於 Core Processor, Package, Connectivity, Core Size, Flash Memory.
ATSAM4C16CA-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4C8CA-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4S16CA-AU
✅ 直接替換聯絡詢價
查看資料表 →CY9AF156NPQC-G-JNE2
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAM4C32CA-AUTR 最大額定值與電氣特性
| Core Processor | ARM Cortex-M4/M4F (dual-core) |
| Number of Cores | 2 |
| Core Architecture | 32-bit RISC |
| Maximum Clock Speed | 120 MHz |
| Flash Memory | 2 MB (2M x 8) |
| 供應電壓 | 3.3 V |
| 封裝 | 100-LQFP (14x14 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (industrial) |
| Security Features | Hardware cryptographic acceleration |
| Product Series | SAM4C (ATSAM4C32) |
| Packaging | Tape & Reel (TR) |
| RoHS 狀態 | RoHS Compliant |
| Base Product Number | ATSAM4C32 |
ATSAM4C32CA-AUTR 100-lqfp (14x14 mm) 腳位配置指南
ATSAM4C32CA-AUTR（100-lqfp (14x14 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATSAM4C32CA-AUTR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM4C32CA-AUTR 適用於 6 應用s: Smart Electricity Meters, Smart Grid Data Concentrators, Secure IoT Gateways, Industrial Control and Automation, Building Automation and Home Energy Displays, Battery-Powered Portable Measurement.
Smart Electricity Meters
The ATSAM4C32CA-AUTR was purpose-built for smart energy metering: its two 120 MHz Cortex-M4 cores can dedicate one processor to metering computations (DSP-heavy accumulation and RMS calculations leveraging the Cortex-M4F DSP instructions) while the second core independently runs communication protocols such as DLMS/COSEM over PLC or RF meshes. The 2 MB flash accommodates billing code, protocol stacks, and dual-bank firmware images for secure over-the-air updates in the field. Integrated cryptographic hardware offloads AES-class encryption, protecting billing data and firmware authenticity without consuming core cycles. Operating at 3.3 V in an industrial -40C to +85C LQFP-100 package, it meets the environmental and longevity demands of deployed meter infrastructure.
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Smart Grid Data Concentrators
In smart-grid data concentrators, the ATSAM4C32CA-AUTR aggregates traffic from hundreds of downstream meters while simultaneously uplinking to utility head-end systems. The dual-core 120 MHz architecture enables true concurrent processing: one Cortex-M4 manages the metering-bus protocol stack while the other handles WAN communication and protocol translation, eliminating context-switch bottlenecks that single-core MCUs face. Its 2 MB (2M x 8) flash stores large routing tables, multiple protocol stacks, and secure OTA firmware banks, while the crypto engine authenticates upstream links. The 100-pin LQFP supplies sufficient GPIO and peripheral interfaces for dual communication channels, and the industrial temperature rating suits pole-mounted and substation cabinets.
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Secure IoT Gateways
For industrial IoT gateways, the ATSAM4C32CA-AUTR combines 2 MB of flash for embedded Linux-adjacent or RTOS stacks (FreeRTOS-class) with hardware cryptographic acceleration for TLS-grade device identity and secure boot. The dual-core Cortex-M4 split - one core for sensor acquisition and edge preprocessing, the other for network transport - delivers deterministic latency that single-core designs struggle to achieve. Running at 120 MHz with DSP/FPU instructions, the cores efficiently handle filtering and protocol encoding. The 3.3 V operation simplifies integration with standard logic and communication PHYs, and the 100-pin LQFP (14x14 mm) provides the GPIO density needed for multiple sensor buses, displays, and radio modules in a compact industrial footprint.
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Industrial Control and Automation
Industrial control nodes benefit from the ATSAM4C32CA-AUTR's combination of 120 MHz dual-core compute, rich 100-pin I/O, and -40C to +85C industrial qualification. One Cortex-M4 core can execute the real-time control loop (PID, PWM generation with FPU precision) while the second core manages fieldbus communication (Modbus, CAN-based networks) and HMI updates, isolating hard-real-time duties from protocol timing. The 2 MB flash holds control logic, parameter tables, logging, and a bootloader for field upgrades, while hardware crypto secures configuration data and firmware. At 3.3 V with surface-mount LQFP-100 construction, it integrates cleanly into standard industrial control boards and motor-control front-end designs.
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Building Automation and Home Energy Displays
The ATSAM4C32CA-AUTR serves building automation controllers and home energy management displays where metering accuracy and connectivity coexist. Its dual-core architecture runs the display/HMI task (driving segments or touch interfaces) on one Cortex-M4 core at 120 MHz while the second core processes energy data and network communication, keeping the UI responsive. The 2 MB flash supports graphical assets, protocol stacks, and OTA updates, and the cryptographic engine protects user energy data in compliance with privacy requirements. With 100 GPIO-capable pins in a 14x14 mm LQFP, designers can integrate multiple sensors, relays, and communication transceivers on one controller, reducing BOM count versus discrete MCU-plus-processor designs.
推薦
Battery-Powered Portable Measurement
Portable and battery-powered measurement instruments exploit the ATSAM4C32CA-AUTR's ability to partition workloads across its two 120 MHz Cortex-M4 cores: one core sleeps between measurement bursts while the other handles UI and logging, optimizing energy budget. The Cortex-M4F's hardware FPU accelerates signal-processing math (FFT, filtering) common in portable analyzers, and 2 MB flash retains instrument firmware, calibration tables, and datalogging space. Hardware crypto secures calibration data and wireless links when telemetry is added. The 3.3 V, industrial-grade 100-pin LQFP offers the analog-digital interface density required for multi-channel acquisition front-ends in a compact surface-mount board.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4C32CA-AUTR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAM4C16CA-AU | ATSAM4C8CA-AU | ATSAM4S16CA-AU | CY9AF156NPQC-G-JNE2 |
|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP - same footprint | 100-LQFP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Infineon (Cypress) |
| Core Configuration | Dual-core ARM Cortex-M4/M4F | Dual-core ARM Cortex-M4 | Dual-core ARM Cortex-M4 | Single-core ARM Cortex-M4 | Single-core ARM Cortex-M3 |
主要差異化特點
- Dual-core architecture on a single die (對比ATSAM4S16CA-AU)
- 2 MB flash for dual-bank OTA firmware (對比ATSAM4C16CA-AU)
- Cortex-M4 DSP/FPU performance vs Cortex-M3 competitors (對比CY9AF156NPQC-G-JNE2)
設計說明
The ATSAM4C32CA-AUTR operates from a 3.3 V supply. Decouple each VDD/VDDIO pin pair with 100 nF ceramic capacitors placed within 2 mm of the pins, and add bulk capacitance (10 uF) near the LQFP-100 corner supply entries. If the design derives 3.3 V from a switching regulator, consider an LDO post-regulator or good LC filtering, since metering front-ends and the ADC peripherals are sensitive to switching ripple. Estimated: total core+peripheral current draw is in the tens of milliamps at 120 MHz per Microchip SAM4C family typical figures - confirm exact values in the datasheet electrical characteristics table before sizing the regulator.
Use the standard 14x14 mm LQFP-100 land pattern from IPC-7351 or the Microchip package drawing, with solder-mask-defined pads for reliable reflow. Place a solid ground plane on layer 2 directly under the MCU to control return paths. Keep the crystal/oscillator loop short, guard it with ground, and route the analog front-end (ADC inputs for metering sensing) away from high-dvi/dt digital traces and the crypto-bus switching activity. Provide test points on SWD (serial wire debug) pins for programming and production firmware updates.
A frequent pitfall with dual-core SAM4C devices is assuming both Cortex-M4 cores boot identically - review the datasheet boot and core-communication (mailbox) mechanism before partitioning firmware, and verify which core owns which peripheral via the matrix controller. Second, do not exceed 2 MB flash addressing across dual banks when implementing OTA; plan bank boundaries up front. Third, the AUTR suffix denotes tape-and-reel industrial packaging - order quantity 1000 reels for production; smaller quantities should specify the tray-packaged variant if handling equipment lacks reel feeders.
合規資訊
RoHS compliant per Onlinecomponents distributor datasheet listing; Mouser lists the package as Green (halogen-free designation typical of Microchip Green packages, but confirm via official Microchip certificate). Not an automotive AEC-Q100 part.