ATSAM3N1BA-AU - 48MHz ARM Cortex-M3 MCU 64KB Flash | Atmel
MPN: ATSAM3N1BA-AU ✓ Hoạt độngATSAM3N1BA-AU Tóm tắt
A microcontroller (MCU) integrates a processor core, memory, and peripherals on a single die, serving as the mid-level controller between simple 8-bit parts and full application processors. The SAM3N series sits within the broader ARM Cortex-M embedded controller hierarchy and is designed to converge performance and simplicity for cost-sensitive 32-bit designs.
Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a 24-bit SysTick timer, and a Nested Vector Interrupt Controller (NVIC) for deterministic interrupt handling. The internal oscillator eliminates the need for an external crystal in many designs, and the device is pin-to-pin compatible with SAM7S legacy products (48- and 64-pin versions) and SAM3S devices, simplifying migration paths.
Technical depth: the Cortex-M3 core provides Harvard architecture with separate instruction and data buses, hardware divide, and low-latency interrupt preemption. Flash memory executes code at full speed with an integrated controller, while the 8 KB SRAM supports typical control-loop and communication-buffer workloads at 48 MHz.
Typical applications include industrial control, consumer appliances, metering, and general-purpose embedded systems where a modern 32-bit upgrade from 8-bit MCUs is desired without raising system cost.
Design consideration: the -AU suffix denotes a lead-free, RoHS-compliant LQFP tray package rated for industrial temperature ranges; verify current consumption budget versus the lower-power SAM3N variants early in the design.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found on the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho ATSAM3N1BA-AU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAM3N1BA-AU (cùng hình factor và footprint) — khác nhau ở Core Processor, Interrupt Controller, Pin Compatibility, Program Memory Size, RAM Size.
ATSAM3S4BA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM3N1AA-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAM4S8BA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM3N1CA-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAM3N1BA-AU Tỷ lệ tối đa & tính chất điện
| Core Processor | ARM Cortex-M3 revision 2.0 |
| Core Size | 32-bit |
| Maximum Clock Speed | 48 MHz |
| Program Memory Size | 64 KB (64K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 8K x 8 |
| Number of I/O | 47 |
| Instruction Set | Thumb-2 |
| SysTick Timer | 24-bit |
| Interrupt Controller | NVIC (Nested Vector Interrupt Controller) |
| Oscillator Type | Internal |
| Hộp / Vỏ | 64-LQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tray |
| Pin Compatibility | Pin-to-pin compatible with SAM7S (48/64-pin) and SAM3S (48/64/100-pin) |
| Series | SAM3N |
Cấu hình chân ATSAM3N1BA-AU
| Chân 1 | PA00 — Parallel I/O port A, line 0 |
| Chân 2 | PA01 — Parallel I/O port A, line 1 |
| Chân 3 | PA02 — Parallel I/O port A, line 2 |
| Chân 4 | PA03 — Parallel I/O port A, line 3 |
| Chân 5 | PA04 — Parallel I/O port A, line 4 |
| Chân 6 | PA05 — Parallel I/O port A, line 5 |
| Chân 7 | PA06 — Parallel I/O port A, line 6 |
| Chân 8 | PA07 — Parallel I/O port A, line 7 |
| Chân 9 | PA08 — Parallel I/O port A, line 8 |
| Chân 10 | PA09 — Parallel I/O port A, line 9 |
| Chân 11 | PA10 — Parallel I/O port A, line 10 |
| Chân 12 | PA11 — Parallel I/O port A, line 11 |
| Chân 13 | PA12 — Parallel I/O port A, line 12 |
| Chân 14 | PA13 — Parallel I/O port A, line 13 |
| Chân 15 | PA14 — Parallel I/O port A, line 14 |
| Chân 16 | PA15 — Parallel I/O port A, line 15 |
| Chân 17 | PA16 — Parallel I/O port A, line 16 |
| Chân 18 | PA17 — Parallel I/O port A, line 17 |
| Chân 19 | PA18 — Parallel I/O port A, line 18 |
| Chân 20 | PA19 — Parallel I/O port A, line 19 |
| Chân 21 | PA20 — Parallel I/O port A, line 20 |
| Chân 22 | PA21 — Parallel I/O port A, line 21 |
| Chân 23 | PA22 — Parallel I/O port A, line 22 |
| Chân 24 | PA23 — Parallel I/O port A, line 23 |
| Chân 25 | PA24 — Parallel I/O port A, line 24 |
| Chân 26 | PA25 — Parallel I/O port A, line 25 |
| Chân 27 | PA26 — Parallel I/O port A, line 26 |
| Chân 28 | PA27 — Parallel I/O port A, line 27 |
| Chân 29 | PA28 — Parallel I/O port A, line 28 |
| Chân 30 | PA29 — Parallel I/O port A, line 29 |
| Chân 31 | PA30 — Parallel I/O port A, line 30 |
| Chân 32 | PA31 — Parallel I/O port A, line 31 |
| Chân 33 | PB00 — Parallel I/O port B, line 0 |
| Chân 34 | PB01 — Parallel I/O port B, line 1 |
| Chân 35 | PB02 — Parallel I/O port B, line 2 |
| Chân 36 | PB03 — Parallel I/O port B, line 3 |
| Chân 37 | PB04 — Parallel I/O port B, line 4 |
| Chân 38 | PB05 — Parallel I/O port B, line 5 |
| Chân 39 | PB06 — Parallel I/O port B, line 6 |
| Chân 40 | PB07 — Parallel I/O port B, line 7 |
| Chân 41 | PB08 — Parallel I/O port B, line 8 |
| Chân 42 | PB09 — Parallel I/O port B, line 9 |
| Chân 43 | PB10 — Parallel I/O port B, line 10 |
| Chân 44 | PB11 — Parallel I/O port B, line 11 |
| Chân 45 | PB12 — Parallel I/O port B, line 12 |
| Chân 46 | PB13 — Parallel I/O port B, line 13 |
| Chân 47 | PB14 — Parallel I/O port B, line 14 |
| Chân 48 | VDDIO — I/O power supply |
| Chân 49 | GND — Ground |
| Chân 50 | VDDCORE — Core power supply |
| Chân 51 | VDDIN — Internal regulator input supply |
| Chân 52 | GND — Ground |
| Chân 53 | XIN — Crystal oscillator input |
| Chân 54 | XOUT — Crystal oscillator output |
| Chân 55 | VDDPLL — PLL power supply |
| Chân 56 | GND_PLL — PLL ground |
| Chân 57 | NRST — Bidirectional reset pin with internal pull-up |
| Chân 58 | ERASE — Flash erase pin (active high) |
| Chân 59 | TCK/SWCLK — JTAG test clock / SWD clock |
| Chân 60 | TMS/SWDIO — JTAG test mode select / SWD data I/O |
| Chân 61 | TDI — JTAG test data input |
| Chân 62 | TDO/TRACESWO — JTAG test data output / trace output |
| Chân 63 | TST — Test mode pin (tie to GND in normal operation) |
| Chân 64 | VDDIO — I/O power supply |
Ứng dụng tiêu biểu
ATSAM3N1BA-AU phù hợp cho 6 Áp dụngs: Industrial Control Systems, Smart Metering, Consumer Appliances, Legacy SAM7S Board Migration, Embedded Sensing and Data Logging, Motor Control and Lighting Control.
Industrial Control Systems
The ATSAM3N1BA-AU fits industrial control nodes where a deterministic 32-bit core is required at 8-bit-class cost. Its 48 MHz ARM Cortex-M3 core with NVIC delivers fast, bounded interrupt latency for real-time control loops, while 47 GPIO lines drive relays, read sensors, and interface with HMI elements. The 64 KB Flash accommodates typical PLC-style control firmware, and the 8 KB SRAM buffers communication payloads. Deployed between a 24 V industrial supply (via a simple buck regulator) and peripheral drivers, the MCU's internal oscillator reduces BOM cost in noise-tolerant nodes, while an external crystal can be added for precise UART timing on Modbus RTU links. Because it is pin-compatible with SAM3S and SAM4S parts, industrial OEMs can qualify one PCB across multiple firmware and memory configurations, reducing inventory risk when production volumes shift between product tiers.
Được đề xuất
Smart Metering
Utility metering - electricity sub-meters, water meters, and gas telemetry nodes - benefits from the ATSAM3N1BA-AU's balance of performance, memory, and cost. The Cortex-M3 core performs pulse counting, cumulative consumption arithmetic, and CRC-protected data framing at 48 MHz without consuming the entire 64 KB Flash budget, leaving headroom for field-updatable calibration tables in the remaining code space. The 47 I/O lines support optical port interfaces, tamper switches, and segment LCD or LED indicators. Firmware can rely on the internal oscillator for wake-up timing and switch to a crystal for precision measurement windows, reducing average power. The tray-packed 64-LQFP suits automated pick-and-place in meter PCB assembly, and the SAM3N's documented migration path to SAM3S/SAM4S allows meter platforms to add communication stacks (USB, more Flash) on the same footprint across product generations.
Được đề xuất
Consumer Appliances
Home appliances such as coffee machines, air purifiers, rice cookers, and fan controllers use the ATSAM3N1BA-AU as their main control MCU. The 48 MHz Cortex-M3 core comfortably runs state machines, touch/button debouncing, and display refresh concurrently, while Thumb-2 instruction density keeps the complete application within 64 KB Flash including localized string tables. The internal oscillator supports cost-optimized boards without a crystal in designs where timing accuracy is non-critical, and the NVIC enables responsive safety interrupts (over-temperature, lid-open) with deterministic latency. The 47 GPIO lines drive relays, triac control logic, seven-segment displays, and buzzer outputs. Because appliance OEMs often face long service lives, the SAM3N's pin-to-pin compatibility with SAM7S legacy parts allows PCB reuse when refreshing older product lines to a modern, actively supported 32-bit platform without layout changes.
Được đề xuất
Legacy SAM7S Board Migration
The ATSAM3N1BA-AU is explicitly designed as a drop-in migration target for SAM7S legacy designs in 48- and 64-pin packages, per the Atmel SAM3N datasheet. Engineering teams maintaining aging ARM7TDMI-based boards can drop the SAM3N1B into the same 64-LQFP footprint and gain the modern Cortex-M3 revision 2.0 core, Thumb-2 density, and a 24-bit SysTick timer while keeping the PCB unchanged. Firmware requires recompilation for the ARMv7-M architecture, and interrupt controllers differ (VIC vs NVIC), so the migration involves a firmware port rather than a binary swap - typically a bounded engineering effort since peripheral register maps follow Atmel's common style. This migration path de-risks sourcing of discontinued ARM7 parts and prepares the platform for further upgrades to SAM3S or SAM4S on the identical footprint, protecting the PCB investment across multiple silicon generations.
Được đề xuất
Embedded Sensing and Data Logging
Battery-powered and line-powered data loggers use the ATSAM3N1BA-AU to poll analog and digital sensors, timestamp events, and store or transmit records. The 8 KB SRAM buffers sensor frames and communication packets, while the 64 KB Flash leaves room for firmware plus configuration tables. Multiple serial peripherals handle RS-485, I2C sensor buses, and debug UARTs simultaneously; the 47 GPIO lines manage sensor enable switches and status LEDs. Designers can clock the core down from 48 MHz between sampling windows to cut current consumption, then run at full speed during ADC sampling and radio or modem transfers. The internal oscillator provides clock-free standby timing, and the LQFP's exposed lead-frame thermal behavior keeps junction temperatures safe in sealed enclosures. Pin compatibility with SAM3S/SAM4S lets a logger family share one PCB across connectivity tiers.
Được đề xuất
Motor Control and Lighting Control
Low-end motor control - fans, pumps, dampers - and advanced lighting ballast controllers leverage the ATSAM3N1BA-AU's deterministic 48 MHz Cortex-M3 core for PWM generation, commutation timing, and closed-loop speed regulation. The NVIC delivers sub-microsecond-class interrupt response for current-loop servicing, while the 24-bit SysTick provides a stable timebase for control scheduling. The 47 GPIO lines multiplex PWM outputs, hall/encoder inputs, and fault inputs; 64 KB Flash holds control firmware plus parameter tables, and 8 KB SRAM supports PI-loop state variables and diagnostic buffers. Using the internal oscillator for boot and a crystal for precision commutation timing balances cost and accuracy. Because the SAM3N is pin-compatible with SAM3S parts, lighting OEMs can add USB (DALI/DMX service interfaces) by swapping to ATSAM3S4BA-AU on the same PCB without redesigning the power or driver stages.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAM3N1BA-AU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAM3S4BA-AU | ATSAM3N1AA-AU | ATSAM4S8BA-AU | ATSAM3N1CA-AU |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same footprint | 64-LQFP (10x10 mm) - same footprint | 64-LQFP (10x10 mm) - same footprint | LQFP-100 (shares SAM3 pinout subset) |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Core | ARM Cortex-M3 rev 2.0 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M4 | ARM Cortex-M3 |
| Max Clock Speed | 48 MHz | 64 MHz | 48 MHz | 120 MHz | 48 MHz |
| Flash Memory | 64 KB | 256 KB | 32 KB | 512 KB | 96 KB |
| SRAM | 8 KB | 48 KB | 8 KB | 128 KB | 16 KB |
| USB Peripheral | No | Yes (USB 2.0 Full Speed device) | No | Yes (USB 2.0 device) | No |
Bảo phân biệt quan trọng
- Lowest-cost entry into the pin-compatible SAM3 64-LQFP family (vsATSAM3S4BA-AU)
- Documented legacy migration path (vsATSAM4S8BA-AU)
- 48 MHz Cortex-M3 with internal oscillator (vsATSAM3N1AA-AU)
Ghi chú thiết kế
The SAM3N family integrates an internal voltage regulator: VDDIN feeds the on-chip regulator that supplies VDDCORE, so connect VDDIN and VDDIO to the 3.3 V rail with local 100 nF decoupling plus a bulk capacitor, and place the regulator output capacitor per the datasheet's stated value on VDDCORE. Do not drive VDDCORE externally unless the datasheet variant requires it. Distribute VDDIO at multiple points across the 64-LQFP to keep I/O ground bounce low when driving many GPIO simultaneously.
For reliable SWD debugging, bring TCK/SWCLK (pin 59) and TMS/SWDIO (pin 60) to a standard 10-pin Cortex debug header with series resistors (33-100 ohm) near the MCU. Tie ERASE (pin 58) through a jumper to ground - it blanks Flash security bits when pulsed high - and never leave it floating in noisy environments. Keep the crystal (XIN/XOUT, pins 53-54) loop compact with guard ground if precision timing is needed; otherwise the internal oscillator suffices for crystal-free designs.
The TST pin (pin 63) must be tied to ground in production; leaving it floating can place the device into test mode. NRST has an internal pull-up but benefits from an external 100 nF to ground for brown-out robustness. When migrating firmware from SAM7S, remember the interrupt architecture changes from VIC to NVIC and startup code, vector tables, and clock configuration (PLL settings differ) must be regenerated - a recompiled port is required, not a binary copy.
Thông tin tuân thủ
The -AU package suffix denotes lead-free/RoHS-compliant LQFP per historical Atmel package nomenclature; formal RoHS/REACH declarations should be confirmed on the current Microchip compliance portal before regulated-market shipping.