ATSAM3N1BB-AUR - Cortex-M3 MCU 48MHz 64KB Flash | Microchip
MPN： ATSAM3N1BB-AUR ✓ 啟用中ATSAM3N1BB-AUR 概覽
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest tier of the embedded processing hierarchy: ARM Cortex-M3 core -> 32-bit microcontroller -> embedded processor -> semiconductor device. The SAM3N family is Microchip/Atmel's entry-level, cost-optimized Cortex-M3 line, and the series is pin-to-pin compatible with the SAM3S series, enabling straightforward migration when USB or added memory is later required.
Key features of the ATSAM3N1BB-AUR include a high-performance 32-bit RISC Cortex-M3 core with nested vectored interrupt controller, 64KB (64K x 8) of embedded Flash, 8KB of SRAM, a supply range of 1.8V to 3.3V, and industrial temperature operation (-40C to +85C). Peripherals include multiple serial communication interfaces (UART, SPI, I2C/TWI), a 10-bit ADC, timers, PWM channels, and general-purpose I/O, providing strong integration for cost-sensitive designs.
Technically, the Cortex-M3 architecture delivers deterministic interrupt handling via the NVIC, a 3-stage pipeline, and Thumb-2 instruction density, allowing efficient C-language execution without external memory. The SAM3N integrates a power management controller with multiple sleep and wait modes, reducing average current in battery-powered systems. The green, halogen-free LQFP package with gull-wing terminals supports automated assembly and MSL-compliant reflow.
Typical applications include industrial automation and control panels, consumer appliances, metering, lighting control, and PC/peripheral interfaces where a 48 MHz 32-bit core with rich serial connectivity is required at aggressive price points.
Design consideration: supply the MCU from a clean 3.3V rail with local 0.1uF decoupling on each supply pin pair, and reserve the SAM3S pin-compatible footprint (e.g., ATSAM3S1BB) if USB may be needed in future product variants.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATSAM3N1BB-AUR — 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： ATSAM3N1BB-AUR （相同外形與佔位） — 差異在於 Package, Packaging, RoHS Status, Core Processor, Core Size.
ATSAM3N1BB-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM3N1CB-AUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM3N2BB-AUR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM3N4BB-AUR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM3S1BB-AUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM3S4CB-AUR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM3N1BB-AUR 最大額定值與電氣特性
| Core Processor | ARM Cortex-M3 |
| Core Size | 32-Bit Single-Core |
| 最大時脈頻率 | 48 MHz |
| Flash Memory | 64KB (64K x 8) |
| SRAM | 8KB |
| 供應電壓 | 1.8 V to 3.3 V |
| 工作溫度 | -40C to +85C (Industrial) |
| 封裝 | 64-LQFP (10x10 mm) |
| 安裝類型 | Surface Mount |
| Connectivity | I2C, SPI, UART |
| ADC Resolution | 10-bit |
| Data Converters | ADC 10-bit |
| Series | SAM3N |
| Packaging | Tape & Reel (T/R) |
| RoHS 狀態 | Compliant (Green package) |
| Temperature Grade | Industrial |
ATSAM3N1BB-AUR 64-lqfp (10x10 mm) 腳位配置指南
ATSAM3N1BB-AUR（64-lqfp (10x10 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： ATSAM3N1BB-AUR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM3N1BB-AUR 適用於 6 應用s: Industrial Automation and Control, Consumer Appliances, Utility Metering, Lighting Control, PC Peripherals and Accessories, IoT Sensor Nodes.
Industrial Automation and Control
Factory automation nodes, PLC auxiliary logic, and sensor acquisition modules benefit directly from the ATSAM3N1BB-AUR's combination of a 48 MHz Cortex-M3 core, 64KB Flash, and industrial -40C to +85C temperature rating. Multiple UART, SPI, and I2C interfaces let one MCU bridge field sensors to a supervisory controller over RS-485 or Modbus links implemented on a UART. The 10-bit ADC samples potentiometers, current shunts via amplifiers, and temperature sensors without external converter ICs, reducing BOM cost. Low-power wait and sleep modes cut average consumption in always-on monitoring nodes, while the pin-compatible SAM3S footprint preserves a future upgrade path if USB diagnostics are later required.
推薦
Consumer Appliances
Washing machines, rice cookers, air-conditioner user interfaces, and small appliances need a 32-bit MCU that handles touch/button input, display driving, and actuator control at aggressive cost points - exactly the SAM3N series' stated market scope. The ATSAM3N1BB-AUR's 48 MHz Cortex-M3 delivers headroom for UI state machines, debounce logic, and simple control loops, while 64KB Flash accommodates multilingual menu strings and OTA-style update stubs. GPIO count in the 64-LQFP supports segmented LCD or LED matrix driving through SPI. The green, RoHS-compliant package meets global consumer environmental regulations, and tape-and-reel packing supports high-volume SMT lines.
推薦
Utility Metering
Electricity, water, and gas meters run for a decade on constrained power budgets, making the ATSAM3N1BB-AUR's sleep-mode power management and 1.8V-capable supply range valuable. The 10-bit ADC with multiple channels reads shunt or transformer-derived current samples, while a timer captures pulse inputs from reed switches on water and gas meters. UART communication supports DLMS/COSEM protocol stacks over optical probes or RS-485, and 64KB Flash stores tariff tables and logs within the 8KB SRAM working set. The industrial temperature grade survives unconditioned outdoor meter cabinets, and the SAM3S pin-compatible footprint allows a USB-service-port variant without respinning the PCB.
推薦
Lighting Control
Dimmable LED drivers, DALI slave nodes, and architectural lighting controllers use the ATSAM3N1BB-AUR's PWM timers to generate dimming waveforms at the 48 MHz core clock with fine duty resolution. UART or I2C links accept DMX, DALI, or proprietary bridge commands, and the 10-bit ADC monitors LED string current and heatsink temperature for closed-loop protection. The 64KB Flash holds scene tables and fade curves, while the Cortex-M3 NVIC keeps PWM and communication timing deterministic under interrupt load. Low standby modes suit occupancy-controlled fixtures, and industrial temperature rating covers enclosed ceiling drivers where ambient temperatures run high.
推薦
PC Peripherals and Accessories
Keyboard controllers, barcode-scanner logic, printer panels, and POS accessories fall in the SAM3N's intended cost-sensitive, high-volume scope. The ATSAM3N1BB-AUR scans key matrices via GPIO with hardware-consistent timing, drives segment or dot-matrix displays through SPI, and processes sensor data from the 10-bit ADC in scanner or encoder applications. Communication with the host occurs over UART bridging to USB-interface companion chips - or designers can move to the pin-compatible ATSAM3S1BB-AUR when native USB device support is needed, keeping the same PCB layout. The 48 MHz core provides ample cycle budget for HID-style protocol handling and local diagnostics.
推薦
IoT Sensor Nodes
Wired and low-radio IoT endpoints use the ATSAM3N1BB-AUR as the main controller: SPI links to sub-GHz or 2.4 GHz radio modules, I2C to environmental sensors, and the 10-bit ADC to monitor battery voltage and external analog probes. Sleep and wait modes minimize average current between reporting intervals, extending battery life in metering-style deployments. The 64KB Flash and 8KB SRAM comfortably hold lightweight MQTT or CoAP stacks with a small TLS-less application layer, and the Cortex-M3 Thumb-2 instruction set keeps firmware compact. Industrial temperature rating and green RoHS packaging suit both commercial building and light-industrial node environments.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM3N1BB-AUR — 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 | ATSAM3N1BB-AU | ATSAM3N1CB-AUR | ATSAM3S1BB-AUR | ATSAM3S4CB-AUR |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Frequency | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz |
| Flash Memory | 64KB | 64KB | 128KB | 64KB | 256KB |
| USB | No | No | No | Yes (USB device) | Yes (USB device) |
| Packing | Tape & Reel (-AUR) | Tray (-AU) | Tape & Reel | Tape & Reel | Tape & Reel |
主要差異化特點
- Lowest-cost SAM3N entry point with full 64KB Flash (對比ATSAM3N2BB-AUR)
- No unused USB silicon cost (對比ATSAM3S1BB-AUR)
- Tape-and-reel production packing (對比ATSAM3N1BB-AU)
設計說明
Estimated: budget the power tree for a single 3.3V rail within the 1.8V-3.3V specified range, with at least one 0.1uF ceramic decoupling capacitor per supply pin pair placed within 2 mm of the pin, plus a 4.7uF-10uF bulk capacitor near the MCU. Verify VDDCORE requirements (some SAM3 devices use an internal regulator fed from VDDIO) in the SAM3N datasheet power section before finalizing; the exact pin-split is device-specific and must not be guessed.
The 64-LQFP 0.5 mm pitch leads require solder-mask-defined or NSMD pads per the Microchip LQFP land-pattern recommendation; NSMD generally gives better yield for reflow. Provide a solid ground plane on layer 2 and stitch the exposed ground connections with multiple vias. Keep the SWD debug header (SWCLK/SWDIO) routed short and accessible, since SAM3N devices support SAM-BA recovery via UART only if the boot pins (e.g., TST/BPA states) are wired correctly at reset.
Three frequent SAM3N design errors: (1) ignoring the erase/startup pin states, which selects SAM-BA bootloader versus user Flash at reset - tie them deliberately; (2) reading SRAM as 8KB but allocating buffers above the limit after linker-script defaults from larger SAM3 variants are reused - set the correct linker scatter file; (3) migrating firmware from SAM3S and enabling USB registers that do not exist on SAM3N silicon - gate USB-dependent code with the correct device header. Always build against the SAM3N device pack.
For SPI clocks above a few MHz and longer trace runs to external Flash or radio modules, keep clock lines under 10 cm and add 22-33 ohm series resistors to damp ringing from the LQFP's modest drive strength. The 48 MHz system clock sources UART baud generators accurately, but verify crystal load capacitors against the SAM3N oscillator section rather than copying from other families; startup margins differ with crystal ESR.
合規資訊
Mouser listing identifies the package as LQFP GREEN, IND TEMP, indicating Microchip green (halogen-free, RoHS-compliant) packaging; the -U suffix denotes lead-free. REACH and conflict-minerals status not stated in provided data.