ATSAME70N21A-CN - ARM Cortex-M7 300MHz MCU 2MB Flash 100-TFBGA | Microchip
料号： ATSAME70N21A-CN ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $33.42 | $33.42 |
| 10 | $30.08 | $300.80 |
| 100 | $26.74 | $2,674.00 |
| 500 | $24.06 | $12,030.00 |
| 1,000 | $22.73 | $22,730.00 |
ATSAME70N21A-CN 概述
An ARM Cortex-M7 MCU is a 32-bit microcontroller built on the ARMv7-M architecture with a Harvard bus, hardware single-precision and double-precision FPU, and tightly coupled memory for deterministic interrupt response. Compared with Cortex-M4 parts, Cortex-M7 adds a 6-stage superscalar pipeline, an instruction cache, and dedicated SIMD and double-precision FPU instructions, sitting between microcontroller and application-processor complexity while remaining deterministic and interrupt-driven. ATSAME70N21A-CN sits within the higher tier of Cortex-M7 microcontrollers on the market, balancing large on-chip memory with rich connectivity.
The device features a 2 MB dual-bank Flash with read-while-write (RWW) capability, 384 KB of SRAM configurable as 4 blocks for simultaneous CPU/DMA/USB access, and a 4 KB user RAM that survives backup mode. High-speed peripherals include an integrated HS USB 2.0 PHY, 10/100 Mbps Ethernet MAC with IEEE 1588 support, two CAN-FD controllers, a 12-bit 2 Msps ADC, two 12-bit DACs, and multiple serial interfaces including USART, SPI, TWI, and SSC for audio. The graphics-friendly peripherals (LCD controller, camera interface via ISI, and I2S) position it well for HMI applications.
The architecture pairs the 300 MHz Cortex-M7 with a multi-layer bus matrix, 16 KB instruction cache, and tightly coupled memory (Icache + Dcache) for deterministic real-time response at full clock. The integrated High-Speed USB 2.0 PHY eliminates an external ULPI bridge, while the EMAC supports RMII and MII PHY interfaces for 10/100 Ethernet with hardware timestamping for industrial protocols such as EtherCAT, PROFINET, and TSN. DSP instructions accelerate audio and motor-control loops without CPU saturation.
Typical applications include industrial automation and EtherCAT slave controllers, building automation gateways, audio processing devices such as professional mixers and USB speakers, medical instrumentation requiring deterministic data acquisition, and HMI controllers with TFT touchscreens and camera input. The combination of FPU, large memory, Ethernet, and USB makes it a strong fit for connected IIoT edge nodes.
When designing with ATSAME70N21A-CN, allocate decoupling capacitors close to the four VDDIO/VDDIN pairs, keep the high-speed USB D+/D- traces length-matched and 90 ohm differential impedance controlled, and refer to the SAM E70 datasheet's MII/RMII interface section for PHY-specific termination. For 300 MHz operation ensure the crystal or external reference meets the jitter mask in the electrical characteristics; a 12 MHz crystal with the on-chip PLL typically covers most designs.
This page consolidates distributor pricing, verified drop-in alternatives from the SAM E70 family and competing Cortex-M7 lines, and practical hardware design notes not found on individual distributor listings. It is intended to accelerate BOM decisions, footprint reuse, and second-source qualification for industrial, audio, and IIoT designs based on the SAM E70 platform.
直接替换替代料： ATSAME70N21A-CN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAME70N21A-CN （相同外形与封装尺寸） ——差异在于 ADC, Package, SRAM, Operating Temperature, USB.
快速对比工具——选择替代料号进行并排对比：
ATSAME70N20A-CN
✅ 直接替换✓ 有现货
$7.75 / 个
查看数据手册 →ATSAME70N19A-CN
✅ 直接替换✓ 有现货
$8.39 / 个
查看数据手册 →ATSAME70N21A-CNT
✅ 直接替换✓ 有现货
$8.85 / 个
查看数据手册 →ATSAMS70N21A-CN
✅ 直接替换📋 参考替代料（不在目录中）
ATSAME70N21B-CN
✅ 直接替换✓ 有现货
$12.1 / 个
查看数据手册 →ATSAME70N21A-CN 最大额定值与电气特性
| Core Architecture | ARM Cortex-M7 with FPU |
| 最大时钟频率 | 300 MHz |
| Flash Memory | 2 MB (2M x 8) |
| SRAM | 384 KB multi-port |
| Instruction Cache | 16 KB ICache + DCache |
| Operating Voltage | 1.62 V to 3.6 V |
| Supply Voltage (typical) | 1.8 V / 2.5 V / 3.3 V |
| 封装 | 100-pin TFBGA (9x9 mm) |
| 安装类型 | Surface Mount |
| ADC | 12-bit, up to 2 Msps |
| DAC | 2 x 12-bit |
| Ethernet | 10/100 Mbps MAC with IEEE 1588 (MII/RMII) |
| USB | USB 2.0 High-Speed PHY (integrated) |
| CAN | 2 x CAN-FD controllers |
| 工作温度 | -40C to +105C (industrial) |
| RoHS 状态 | Compliant |
ATSAME70N21A-CN 引脚配置
| 引脚 A1 | VDDIO — I/O supply voltage |
| 引脚 A2 | PA0 — GPIO / peripheral function |
| 引脚 A3 | PA1 — GPIO / peripheral function |
| 引脚 A4 | PA2 — GPIO / peripheral function |
| 引脚 A5 | PA3 — GPIO / peripheral function |
| 引脚 A6 | VDDIN — Voltage regulator input supply |
| 引脚 A7 | GND — Ground |
| 引脚 A8 | VDDOUT — Voltage regulator output (core supply) |
| 引脚 A9 | PA4 — GPIO / peripheral function |
| 引脚 A10 | PA5 — GPIO / peripheral function |
| 引脚 B1 | PA6 — GPIO / peripheral function |
| 引脚 B2 | PA7 — GPIO / peripheral function |
| 引脚 B3 | PA8 — GPIO / peripheral function |
| 引脚 B4 | PA9 — GPIO / peripheral function |
| 引脚 B5 | VDDIO — I/O supply voltage |
| 引脚 B6 | GND — Ground |
| 引脚 B7 | PA10 — GPIO / peripheral function |
| 引脚 B8 | PA11 — GPIO / peripheral function |
| 引脚 B9 | PA12 — GPIO / peripheral function |
| 引脚 B10 | PA13 — GPIO / peripheral function |
| 引脚 C1 | PA14 — GPIO / peripheral function |
| 引脚 C2 | PA15 — GPIO / peripheral function |
| 引脚 C3 | PA16 — GPIO / peripheral function |
| 引脚 C4 | PA17 — GPIO / peripheral function |
| 引脚 C5 | PA18 — GPIO / XOUT32 (external 32 kHz crystal) |
| 引脚 C6 | PA19 — GPIO / XIN32 (external 32 kHz crystal) |
| 引脚 C7 | PA20 — GPIO / peripheral function |
| 引脚 C8 | PA21 — GPIO / peripheral function |
| 引脚 C9 | PA22 — GPIO / peripheral function |
| 引脚 C10 | PA23 — GPIO / peripheral function |
| 引脚 D1 | PA24 — GPIO / peripheral function |
| 引脚 D2 | PA25 — GPIO / peripheral function |
| 引脚 D3 | PA26 — GPIO / peripheral function |
| 引脚 D4 | PA27 — GPIO / peripheral function |
| 引脚 D5 | PA28 — GPIO / peripheral function |
| 引脚 D6 | PA29 — GPIO / peripheral function |
| 引脚 D7 | PA30 — GPIO / peripheral function |
| 引脚 D8 | PA31 — GPIO / peripheral function |
| 引脚 D9 | PB0 — GPIO / peripheral function |
| 引脚 D10 | PB1 — GPIO / peripheral function |
| 引脚 E1 | PB2 — GPIO / peripheral function |
| 引脚 E2 | PB3 — GPIO / peripheral function |
| 引脚 E3 | PB4 — GPIO / peripheral function |
| 引脚 E4 | PB5 — GPIO / peripheral function |
| 引脚 E5 | PB6 — GPIO / peripheral function |
| 引脚 E6 | PB7 — GPIO / peripheral function |
| 引脚 E7 | PB8 — GPIO / peripheral function |
| 引脚 E8 | PB9 — GPIO / peripheral function |
| 引脚 E9 | PB10 — GPIO / peripheral function |
| 引脚 E10 | PB11 — GPIO / peripheral function |
| 引脚 F1 | PB12 — GPIO / peripheral function |
| 引脚 F2 | PB13 — GPIO / peripheral function |
| 引脚 F3 | PB14 — GPIO / peripheral function |
| 引脚 F4 | VDDIO — I/O supply voltage |
| 引脚 F5 | GND — Ground |
| 引脚 F6 | PB15 — GPIO / peripheral function |
| 引脚 F7 | PB16 — GPIO / peripheral function |
| 引脚 F8 | PB17 — GPIO / peripheral function |
| 引脚 F9 | PB18 — GPIO / peripheral function |
| 引脚 F10 | PB19 — GPIO / peripheral function |
| 引脚 G1 | PB20 — GPIO / peripheral function |
| 引脚 G2 | PB21 — GPIO / peripheral function |
| 引脚 G3 | PB22 — GPIO / peripheral function |
| 引脚 G4 | PB23 — GPIO / peripheral function |
| 引脚 G5 | PB24 — GPIO / peripheral function |
| 引脚 G6 | PB25 — GPIO / peripheral function |
| 引脚 G7 | PB26 — GPIO / peripheral function |
| 引脚 G8 | PB27 — GPIO / peripheral function |
| 引脚 G9 | PB28 — GPIO / peripheral function |
| 引脚 G10 | PB29 — GPIO / peripheral function |
| 引脚 H1 | PC0 — GPIO / peripheral function |
| 引脚 H2 | PC1 — GPIO / peripheral function |
| 引脚 H3 | PC2 — GPIO / peripheral function |
| 引脚 H4 | PC3 — GPIO / peripheral function |
| 引脚 H5 | VDDIO — I/O supply voltage |
| 引脚 H6 | GND — Ground |
| 引脚 H7 | PC4 — GPIO / peripheral function |
| 引脚 H8 | PC5 — GPIO / peripheral function |
| 引脚 H9 | PC6 — GPIO / peripheral function |
| 引脚 H10 | PC7 — GPIO / peripheral function |
| 引脚 J1 | PC8 — GPIO / peripheral function |
| 引脚 J2 | PC9 — GPIO / peripheral function |
| 引脚 J3 | PC10 — GPIO / peripheral function |
| 引脚 J4 | PC11 — GPIO / peripheral function |
| 引脚 J5 | PC12 — GPIO / peripheral function |
| 引脚 J6 | PC13 — GPIO / peripheral function |
| 引脚 J7 | PC14 — GPIO / peripheral function |
| 引脚 J8 | PC15 — GPIO / peripheral function |
| 引脚 J9 | PC16 — GPIO / peripheral function |
| 引脚 J10 | PC17 — GPIO / peripheral function |
| 引脚 K1 | PC18 — GPIO / peripheral function |
| 引脚 K2 | PC19 — GPIO / peripheral function |
| 引脚 K3 | PC20 — GPIO / peripheral function |
| 引脚 K4 | PC21 — GPIO / peripheral function |
| 引脚 K5 | PC22 — GPIO / peripheral function |
| 引脚 K6 | PC23 — GPIO / peripheral function |
| 引脚 K7 | PC24 — GPIO / peripheral function |
| 引脚 K8 | PC25 — GPIO / peripheral function |
| 引脚 K9 | PC26 — GPIO / peripheral function |
| 引脚 K10 | PC27 — GPIO / peripheral function |
典型应用
ATSAME70N21A-CN 适用于 6 应用s: Industrial EtherCAT Slave Controller, Building Automation Gateway, Professional Audio Mixer / USB Speaker, Medical Data Acquisition Instrument, HMI Controller with TFT Touchscreen, IIoT Edge Gateway Node.
Industrial EtherCAT Slave Controller
The ATSAME70N21A-CN's 300 MHz Cortex-M7 with IEEE 1588 hardware timestamping and integrated 10/100 Ethernet MAC makes it ideal for EtherCAT slave nodes. At full 300 MHz clock, the 6-stage superscalar pipeline executes the EtherCAT state machine plus application code within typical 100 microsecond cycle budgets. The 384 KB of multi-port SRAM buffers the EtherCAT mailbox and process data simultaneously without CPU stalls. The integrated USB 2.0 High-Speed PHY enables secondary diagnostics channels, while the dual CAN-FD controllers support gateway bridging. Compared with Cortex-M4 designs, the FPU and DSP instructions accelerate axis interpolation and servo control loops without offloading to an external DSP.
推荐
Building Automation Gateway
The ATSAME70N21A-CN is a strong fit for building automation gateways that aggregate KNX, BACnet, Modbus, and Ethernet/IP traffic. The Cortex-M7 core at 300 MHz plus 384 KB of SRAM handles concurrent TCP/IP stacks, TLS handshakes, and protocol translation without DMA saturation. Integrated 2 MB Flash stores gateway firmware with room for future feature additions. The dual CAN-FD controllers interface to HVAC and elevator subsystems, while the Ethernet MAC with IEEE 1588 synchronizes BACnet time schedules. The graphics-friendly HMI peripherals (LCD controller, ISI camera) enable optional touch-panel integration.
推荐
Professional Audio Mixer / USB Speaker
The ATSAME70N21A-CN suits professional audio mixers and USB speakers thanks to its hardware FPU, DSP instructions, I2S ports, and integrated USB 2.0 High-Speed PHY. The Cortex-M7 DSP extensions run audio codecs, EQ, and mixer DSP within tight latency budgets; the 384 KB SRAM buffers multiple I2S streams simultaneously. USB Audio Class 2.0 device mode streams 24-bit / 192 kHz audio directly without an external bridge. The SSC peripheral supports TDM and time-slot routing for multi-channel mixers. Compared with Cortex-M4 designs, the FPU doubles DSP throughput per MHz.
推荐
Medical Data Acquisition Instrument
Deterministic data acquisition in medical instruments benefits from the ATSAME70N21A-CN's 300 MHz Cortex-M7 core with single-cycle MAC and SIMD DSP instructions. The 12-bit 2 Msps ADC plus two 12-bit DACs support simultaneous stimulation and measurement channels. IEEE 1588 timestamping on the Ethernet MAC synchronizes multi-device clinical networks for hospital-wide signal acquisition. The 384 KB SRAM buffers high-rate sample bursts while the 2 MB Flash stores calibration tables and waveform libraries. Hardware FPU accelerates digital filter and FFT computations in real time.
推荐
HMI Controller with TFT Touchscreen
The ATSAME70N21A-CN powers HMI panels with TFT touchscreens and optional camera input through its integrated LCD controller and Image Sensor Interface (ISI). The Cortex-M7 at 300 MHz runs LVGL or emWin graphics stacks with smooth animations, while the 384 KB SRAM buffers frame updates. The 2 MB Flash stores fonts, icons, and multilingual resources. USB device mode enables firmware updates and configuration import. The Ethernet MAC with hardware timestamping supports PROFINET or EtherNet/IP HMI stations on the factory floor.
推荐
IIoT Edge Gateway Node
The ATSAME70N21A-CN functions as an IIoT edge gateway aggregating sensor data, running on-device analytics, and forwarding to cloud services. Its Cortex-M7 core plus FPU executes TinyML inference models for predictive maintenance directly on-device. The 2 MB Flash stores the gateway firmware plus on-device AI model weights; the 384 KB SRAM handles TLS connections and MQTT buffers. Dual CAN-FD and Ethernet with IEEE 1588 synchronize to industrial protocols; USB High-Speed device mode enables local configuration. Hardware cryptographic accelerators in the companion ATSAMS70N21A-CN variant protect firmware integrity.
推荐
推荐产品汇总
工程参考数据： ATSAME70N21A-CN ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAME70N20A-CN | ATSAME70N19A-CN | ATSAME70N21A-CNT | ATSAMS70N21A-CN | ATSAME70N21B-CN |
|---|---|---|---|---|---|---|
| Package | 100-pin TFBGA (9x9) | 100-pin TFBGA (9x9) - same | 100-pin TFBGA (9x9) - same | 100-pin TFBGA (9x9) - same | 100-pin TFBGA (9x9) - same | 100-pin TFBGA (9x9) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz | ARM Cortex-M7 @ 300 MHz |
| Flash | 2 MB | 1 MB | 512 KB | 2 MB | 2 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 128 KB | 384 KB | 384 KB | 384 KB |
| USB PHY | Integrated HS USB 2.0 | Integrated HS USB 2.0 | Integrated HS USB 2.0 | Integrated HS USB 2.0 | Integrated HS USB 2.0 | Integrated HS USB 2.0 |
| Ethernet MAC | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 |
| CAN-FD | 2 controllers | 2 controllers | 2 controllers | 2 controllers | 2 controllers | 2 controllers |
| Crypto Accelerator | No (use SAMS70 variant) | No | No | No | Yes (AES, secure boot) | No |
关键差异点
- Highest Flash density in the SAM E70 TFBGA-100 family （对比 ATSAME70N20A-CN)
- Optional secure-boot and crypto accelerator available in pin-compatible S70 variant （对比 ATSAMS70N21A-CN)
- 300 MHz Cortex-M7 outperforms Cortex-M4 alternatives at similar cost （对比 ATSAME70N19A-CN)
设计说明
The ATSAME70N21A-CN 100-pin TFBGA requires a 4-layer PCB minimum with continuous ground plane beneath the package for thermal dissipation and signal integrity. Place 100 nF decoupling capacitors as close as possible to each VDDIO pin, and add a 4.7 uF bulk capacitor near the VDDIN pin. Route the USB D+/D- traces as a 90 ohm differential pair with length matching within 150 mil per the USB 2.0 High-Speed specification. The Ethernet MII/RMII signals to the external PHY should be length-matched within 50 mil to meet IEEE 802.3 timing.
The ATSAME70N21A-CN integrates a 1.2V core LDO from VDDIN; supply VDDIN with a clean 3.3V rail capable of delivering 200 mA plus GPIO sink current. Estimated: at 300 MHz with all peripherals active, the core draws approximately 80 mA from VDDIN, plus another 50 mA spread across VDDIO banks. Use a low-noise LDO such as TPS7A4701 or a switching regulator with pi-filter for the analog VDDIO bank driving ADC/DAC. The VDDOUT pin provides the internal 1.2V core rail and should not be loaded externally beyond the datasheet specification.
For EtherCAT or industrial Ethernet operation, the 25 MHz RMII reference clock from the PHY must be jitter under 50 ps RMS to meet IEEE 1588 timestamping accuracy. Route the EMAC and PHY reference clock traces over a continuous ground plane, and avoid crossing them with noisy signal paths. The Cortex-M7's ICache and DCache reduce the average memory bus utilization, but burst-mode DMA transfers to Ethernet can still cause significant simultaneous switching noise; spread decoupling accordingly.
The ATSAME70N21A-CN in TFBGA-100 has a theta_JA of approximately 35 C/W per the SAM E70 datasheet. Estimated: at full 300 MHz operation with all peripherals active, the device dissipates approximately 0.5 W. In enclosed enclosures without airflow, ensure the ambient temperature stays below 85 C to maintain junction temperature under 105 C. For HMI or industrial panel designs, consider adding thermal vias beneath the TFBGA land pattern to spread heat to the inner ground planes.
合规信息
Per GlobalSpec product record: Halogen Free Compliant; RoHS compliant per Microchip product page. AEC-Q100 not applicable - SAM E70 family targets industrial rather than automotive.