ATSAM3N1CA-AU - 48MHz Cortex-M3 64KB MCU | Microchip
MPN： ATSAM3N1CA-AU ✗ 停產ATSAM3N1CA-AU 概覽
A microcontroller is a programmable semiconductor that integrates a CPU core, memory, I/O, timers, interrupt control, and peripherals on one integrated circuit. The ATSAM3N1CA-AU belongs to the SAM3N microcontroller family and is based on ARM Cortex-M3 revision 2.0. Its 32-bit architecture and Thumb-2 instruction set support efficient control-oriented processing in consumer, industrial, and medical embedded products.
Key verified features include operation up to 48 MHz, 64KB flash memory, 8K x 8 RAM, 79 I/O pins, and a 100-LQFP package with a 14 x 14 mm footprint. The listed power-supply range is 1.62 V to 3.6 V, while the operating ambient-temperature range is -40°C to 85°C. Additional listed peripherals include three-channel 16-bit timers, PWM capability, a 10-bit ADC, and communication and real-time timing functions.
The Cortex-M3 core includes a 24-bit SysTick counter and a Nested Vector Interrupt Controller. These resources allow firmware to coordinate precise timing, interrupt-driven I/O, motor or waveform control, and mixed-signal measurement without requiring multiple discrete components. The 64KB flash capacity is suitable for compact control firmware, while the 8K x 8 RAM supports working state, buffers, stacks, and peripheral data structures.
Typical applications include industrial automation, consumer electronics, medical devices, data acquisition, low-speed communication, and embedded control systems. Designers should verify pin multiplexing, power sequencing, clock configuration, and peripheral instance availability against the manufacturer datasheet before finalizing a PCB. The surface-mount LQFP package also requires adequate assembly clearance and thermal consideration during soldering and enclosure design.
This page consolidates verified specifications, sourcing information, design considerations, and application guidance. Distributor pricing and lifecycle details should be checked against current authorized-channel data before purchase because the supplied results include search snippets rather than a complete manufacturer-approved inventory record.
直接替換替代品，適用於 ATSAM3N1CA-AU — 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： ATSAM3N1CA-AU （相同外形與佔位） — 差異在於 Package, Supply Voltage, Core Processor, Program Memory Size, RAM Size.
ATSAM4C32CA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4E8EA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM3U4EA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM3N1CA-AU 最大額定值與電氣特性
| Product Type | 32-bit ARM Cortex-M3 flash microcontroller |
| Maximum CPU Frequency | 48 MHz |
| CPU Core | ARM Cortex-M3 revision 2.0 |
| Instruction Set | Thumb-2 |
| Program Memory Size | 64KB (64K x 8) |
| RAM Size | 8K x 8 |
| Number of I/O | 79 |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Operating Ambient Temperature | -40°C to 85°C |
| 封裝 | 100-LQFP (14 x 14 mm) |
| Package Family | LQFP-100 |
| 安裝類型 | Surface mount |
| Oscillator Type | Internal |
| Packaging | Tube |
| System Timer | 24-bit SysTick counter |
| Interrupt Controller | Nested Vector Interrupt Controller |
| ADC | 10-bit, up to 16 channels |
| ADC Sampling Rate | 384 KSPS |
| Timer/PWM | Three-channel 16-bit timer/counter with capture, waveform, compare, and PWM modes |
| Quadrature Decoder | 2-bit Gray up/down counter for stepper motor |
| Real-Time Timer | 32-bit real-time timer with calendar and alarm |
ATSAM3N1CA-AU lqfp-100 腳位配置指南
ATSAM3N1CA-AU（lqfp-100 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： ATSAM3N1CA-AU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM3N1CA-AU 適用於 7 應用s: Industrial Automation Controller, Consumer Electronics, Medical Device Control, Data Acquisition System, Stepper and Motor Control, Timing and Real-Time Control, Communication Gateway.
Industrial Automation Controller
ATSAM3N1CA-AU fits compact industrial automation controllers because its Cortex-M3 core runs up to 48 MHz while providing 79 I/O, timers, PWM, and a 10-bit ADC. Use the microcontroller for sensor acquisition, actuator sequencing, machine-state logic, and deterministic interrupt handling. The 1.62 V to 3.6 V supply range supports low-voltage embedded systems, while the -40°C to 85°C operating range covers many industrial environments. Validate isolation, EMC requirements, connector protection, and long-term supply status before deployment.
推薦
Consumer Electronics
ATSAM3N1CA-AU can serve as the central controller in a consumer device that combines digital I/O, timing, and analog measurement. Its 48 MHz Cortex-M3 performance is suitable for responsive user-interface state machines, configuration handling, and peripheral supervision, while 64KB flash supports focused embedded firmware. The 100-LQFP package provides a conventional surface-mount assembly option, but designers must confirm pin availability, low-power behavior, and package-related soldering constraints in the official documentation.
推薦
Medical Device Control
ATSAM3N1CA-AU is a candidate for low-voltage medical-device control functions when the required product qualification and risk controls are satisfied. Its deterministic timers, interrupt controller, 10-bit ADC, and 79 I/O can support sensor conditioning interfaces, alarm logic, and supervisory functions. The supplied operating range of -40°C to 85°C is useful for industrial medical equipment, but medical use requires application-specific validation, electrical isolation analysis, firmware risk controls, and confirmation of the manufacturer’s intended qualification status.
推薦
Data Acquisition System
ATSAM3N1CA-AU is suited to compact data-acquisition systems that combine analog measurements with digital control and timing. The verified 10-bit ADC supports up to 16 channels and 384 KSPS in the cited peripheral data, while the 32-bit real-time timer and SysTick support scheduled sampling. Use the MCU for channel selection, gain-control sequencing, data buffering, and host communication. For higher precision, pair it with an external ADC such as ADS8320E/2K5 and verify analog noise, sampling architecture, and calibration requirements.
推薦
Stepper and Motor Control
ATSAM3N1CA-AU supports motor-oriented control because the verified peripheral information includes three-channel 16-bit timer/counter functions, PWM modes, and quadrature decoding with a 2-bit Gray up/down counter. A firmware-based motion controller can generate timing signals, monitor position feedback, and coordinate multiple control loops from one microcontroller. Use the 64KB flash for motion algorithms and the 8K x 8 RAM for state and buffers, while carefully checking current ratings, protection networks, timing margins, and motor-driver requirements externally.
推薦
Timing and Real-Time Control
ATSAM3N1CA-AU is appropriate for embedded timing tasks requiring both periodic control and external event handling. The Cortex-M3 core operates up to 48 MHz, SysTick supplies a 24-bit system timer, and the Nested Vector Interrupt Controller supports prioritized interrupt management. These resources can coordinate relays, sampling systems, communication schedules, and watchdog-related supervisory logic. Firmware designers should calculate worst-case interrupt latency, peripheral clock requirements, and startup behavior using the complete manufacturer documentation.
推薦
Communication Gateway
ATSAM3N1CA-AU can be used in a small embedded gateway that coordinates local I/O, timers, analog inputs, and serial communications. Its 79 I/O pins provide substantial parallel connectivity for status indicators, relay controls, and interface signaling, while the 48 MHz core supports protocol handling and buffering. The supplied data does not identify a complete UART, USB, Ethernet, or CAN feature set, so the exact communication variant and peripheral mux must be checked in the datasheet before selecting this MCU for a gateway requirement.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM3N1CA-AU — 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 | ATSAM4C32CA-AU | ATSAM4E8EA-AU | ATSAM3U4EA-AU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-LQFP (14 x 14 mm) | 100-LQFP | 100-LQFP | 100-LQFP |
主要差異化特點
- Verified Cortex-M3 performance and memory configuration (對比ATSAM4C32CA-AU)
- Verified high I/O availability for control-oriented designs (對比ATSAM4E8EA-AU)
- Verified low-voltage operating range (對比ATSAM3U4EA-AU)
設計說明
Design the supply around the verified 1.62 V to 3.6 V operating range and place local decoupling close to the device power pins. Confirm the exact pin names and recommended capacitor values from the manufacturer datasheet before layout. Keep analog and digital return paths organized, provide controlled startup for all rails, and validate brownout, reset, and sequencing behavior in hardware. Do not infer regulator requirements from the generic operating-voltage range alone.
The ATSAM3N1CA-AU uses a 100-LQFP surface-mount package, so preserve the manufacturer land pattern, pin-1 orientation, courtyard, and solder-clearance requirements. Route high-speed or sensitive signals away from switching nodes and noisy return paths. Because the supplied data does not provide the complete pinout, verify every signal assignment against the official package drawing and pin multiplexing table before releasing Gerber files.
Do not treat the verified 48 MHz CPU rating as permission to use every peripheral at maximum frequency. Check peripheral clocks, memory wait-state requirements, electrical limits, and interrupt timing in the datasheet. Likewise, verify ADC input range, sampling time, source impedance, and calibration before using the 10-bit converter for precision measurements. A marketplace snippet is insufficient evidence for pin or peripheral compatibility.
The LQFP package provides a conventional surface-mount thermal path, but actual temperature rise depends on PCB copper, airflow, switching activity, and adjacent heat sources. For a production design, estimate junction temperature from verified power dissipation and the package thermal data, then test at the highest expected ambient temperature. Keep the device away from heat-generating regulators where possible and follow the manufacturer’s land-pattern and reflow guidance.
合規資訊
The supplied verified results do not explicitly extract RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for ATSAM3N1CA-AU. Compliance must be confirmed from current manufacturer documentation or an authorized supplier declaration.
