ATSAME70N21A-CNT - 300MHz Cortex-M7 MCU 2MB Flash | Microchip
MPN: ATSAME70N21A-CNT ✓ Hoạt độngATSAME70N21A-CNT Tóm tắt
What is a Cortex-M7 microcontroller? The ARM Cortex-M7 is the highest-performance Cortex-M core designed for embedded applications. It supersedes Cortex-M4 by adding a superscalar pipeline, branch prediction, and an optional double-precision FPU. Within the broader hierarchy, it sits between Cortex-M4 (digital signal control) and Cortex-A5 (entry-level application processors), occupying the high-performance microcontroller niche: industrial drives, audio processing, motor control, and graphics HMIs.
Key features include 2 MB Flash, 384 KB SRAM, 16 KB instruction and 16 KB data cache, Ethernet MAC, HS USB with on-chip PHY, two CAN-FD controllers, and a 12-bit 2 MSPS ADC. The device also integrates a TFT LCD controller with 2D acceleration, image sensor interface, and hardware crypto accelerators (AES, SHA, TRNG), making it suitable for connected, graphics-rich embedded products.
Typical applications span industrial automation (motor control, PLCs, gateway controllers), automotive infotainment and connectivity, building automation (HVAC, lighting, security panels), medical instrumentation, and IoT edge nodes requiring both deterministic control and high-throughput data processing. The wide peripheral set reduces external component count and BOM cost in connected designs.
Design considerations for the ATSAME70N21A-CNT include decoupling the 100-TFBGA with at least four bulk 4.7 uF ceramics plus 0.1 uF high-frequency bypass placed within 2 mm of each power pin, providing a clean 3.3 V analog supply separate from digital 3.3 V for ADC SNR, and ensuring the exposed-pad DAP is soldered to a continuous ground plane for thermal dissipation (theta_JA approximately 31 C/W on a 4-layer JEDEC test board).
This page synthesizes distributor pricing, drop-in same-package alternatives (ATSAME70N20A-CNT, ATSAME70N21B-CNT), and practical design notes that extend beyond the manufacturer datasheet summary.
Bộ thay thế dễ dàng lắp đặt cho ATSAME70N21A-CNT — 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 ATSAME70N21A-CNT (cùng hình factor và footprint) — khác nhau ở Flash Memory, Ethernet, Mounting Type, Operating Temperature, Package.
ATSAME70N20A-CNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAME70N21B-CNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAME70J21A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAME70N21A-CNT Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M7 with FPU (single + double precision) |
| Maximum CPU Clock | 300 MHz |
| Flash Memory | 2 MB (2048 KB) |
| SRAM | 384 KB |
| Instruction Cache (I-Cache) | 16 KB |
| Data Cache (D-Cache) | 16 KB |
| CoreMark Score | 1500 (typical) |
| Supply Voltage (VDDIO/VDDCORE) | 3.3 V (typical); 1.2 V core |
| Nhiệt độ hoạt động | -40C to +105C (industrial) |
| Hộp | 100-pin TFBGA, 9x9 mm, 0.8 mm pitch |
| ADC | 12-bit, up to 2 MSPS, 24 channels |
| Communication | Ethernet MAC, HS USB PHY, 2x CAN-FD, 4x UART, 5x SPI, 3x I2C, I2S |
| Display Controller | TFT LCD controller with 2D acceleration |
| Crypto Accelerator | AES-256, SHA-256, TRNG hardware |
| Kiểu lắp đặt | Surface Mount (BGA) |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | ROHS3 Compliant |
| Manufacturer Lead Time | 8 weeks (as of 2026-09-22) |
Cấu hình chân ATSAME70N21A-CNT
| Chân A1 | VDDIO — 3.3 V I/O supply |
| Chân A2 | PA0 — GPIO / URXD1 |
| Chân A3 | PA1 — GPIO / UTXD1 |
| Chân A4 | PA2 — GPIO / SPI0_NPCS0 |
| Chân A5 | PA3 — GPIO / SPI0_MISO |
| Chân A6 | PA4 — GPIO / SPI0_MOSI |
| Chân A7 | PA5 — GPIO / SPI0_SPCK |
| Chân A8 | VDDCORE — 1.2 V core supply (internal LDO) |
| Chân A9 | GND — Common ground return |
| Chân A10 | VDDPLL — PLL analog supply (1.2 V) |
| Chân B1 | PA6 — GPIO / PWMH0 |
| Chân B2 | PA7 — GPIO / PWML0 |
| Chân B3 | PA8 — GPIO / PWMH1 |
| Chân B4 | PA9 — GPIO / PWML1 |
| Chân B5 | PA10 — GPIO / TIOA0 |
| Chân B6 | PA11 — GPIO / TIOB0 |
| Chân B7 | PA12 — GPIO / TIOA1 |
| Chân B8 | PA13 — GPIO / TIOB1 |
| Chân B9 | PA14 — GPIO / TCLK1 |
| Chân B10 | GND — Common ground |
| Chân C1 | PB0 — GPIO / AFEC0_AD0 |
| Chân C2 | PB1 — GPIO / AFEC0_AD1 |
| Chân C3 | PB2 — GPIO / AFEC0_AD2 |
| Chân C4 | PB3 — GPIO / AFEC0_AD3 |
| Chân C5 | PB4 — GPIO / AFEC0_AD4 |
| Chân C6 | PB5 — GPIO / AFEC0_AD5 |
| Chân C7 | PB6 — GPIO / AFEC0_AD6 |
| Chân C8 | PB7 — GPIO / AFEC0_AD7 |
| Chân C9 | PB8 — GPIO / AFEC0_AD8 |
| Chân C10 | PB9 — GPIO / AFEC0_AD9 |
| Chân D1 | PB10 — GPIO / AFEC0_AD10 |
| Chân D2 | PB11 — GPIO / AFEC0_AD11 |
| Chân D3 | PB12 — GPIO / AFEC1_AD0 |
| Chân D4 | PB13 — GPIO / AFEC1_AD1 |
| Chân D5 | PB14 — GPIO / AFEC1_AD2 |
| Chân D6 | PB15 — GPIO / AFEC1_AD3 |
| Chân D7 | PB16 — GPIO / AFEC1_AD4 |
| Chân D8 | PB17 — GPIO / AFEC1_AD5 |
| Chân D9 | PB18 — GPIO / TIOA2 |
| Chân D10 | PB19 — GPIO / TIOB2 |
| Chân E1 | PC0 — GPIO / LCDDAT0 |
| Chân E2 | PC1 — GPIO / LCDDAT1 |
| Chân E3 | PC2 — GPIO / LCDDAT2 |
| Chân E4 | PC3 — GPIO / LCDDAT3 |
| Chân E5 | PC4 — GPIO / LCDDAT4 |
| Chân E6 | PC5 — GPIO / LCDDAT5 |
| Chân E7 | PC6 — GPIO / LCDDAT6 |
| Chân E8 | PC7 — GPIO / LCDDAT7 |
| Chân E9 | PC8 — GPIO / LCDDAT8 |
| Chân E10 | PC9 — GPIO / LCDDAT9 |
| Chân F1 | PC10 — GPIO / LCDDAT10 |
| Chân F2 | PC11 — GPIO / LCDDAT11 |
| Chân F3 | PC12 — GPIO / LCDDAT12 |
| Chân F4 | PC13 — GPIO / LCDDAT13 |
| Chân F5 | PC14 — GPIO / LCDDAT14 |
| Chân F6 | PC15 — GPIO / LCDDAT15 |
| Chân F7 | PC16 — GPIO / LCDDAT16 |
| Chân F8 | PC17 — GPIO / LCDDAT17 |
| Chân F9 | PC18 — GPIO / LCDDAT18 |
| Chân F10 | PC19 — GPIO / LCDDAT19 |
| Chân G1 | PC20 — GPIO / LCDDAT20 |
| Chân G2 | PC21 — GPIO / LCDDAT21 |
| Chân G3 | PC22 — GPIO / LCDDAT22 |
| Chân G4 | PC23 — GPIO / LCDDAT23 |
| Chân G5 | PD0 — GPIO / CAN0 TX |
| Chân G6 | PD1 — GPIO / CAN0 RX |
| Chân G7 | PD2 — GPIO / CAN1 TX |
| Chân G8 | PD3 — GPIO / CAN1 RX |
| Chân G9 | PD4 — GPIO / EMAC TXD0 |
| Chân G10 | PD5 — GPIO / EMAC TXD1 |
| Chân H1 | PD6 — GPIO / EMAC TXD2 |
| Chân H2 | PD7 — GPIO / EMAC TXD3 |
| Chân H3 | PD8 — GPIO / EMAC TXEN |
| Chân H4 | PD9 — GPIO / EMAC MDC |
| Chân H5 | PD10 — GPIO / EMAC MDIO |
| Chân H6 | PD11 — GPIO / EMAC RXD0 |
| Chân H7 | PD12 — GPIO / EMAC RXD1 |
| Chân H8 | PD13 — GPIO / EMAC RXD2 |
| Chân H9 | PD14 — GPIO / EMAC RXD3 |
| Chân H10 | PD15 — GPIO / EMAC RXDV |
| Chân J1 | PE0 — GPIO / USB D- |
| Chân J2 | PE1 — GPIO / USB D+ |
| Chân J3 | PE2 — GPIO / USB VBUS |
| Chân J4 | PE3 — GPIO / USB ID |
| Chân J5 | PE4 — GPIO / SPI1_NPCS0 |
| Chân J6 | PE5 — GPIO / SPI1_MISO |
| Chân J7 | PE6 — GPIO / SPI1_MOSI |
| Chân J8 | PE7 — GPIO / SPI1_SPCK |
| Chân J9 | PE8 — GPIO / TWI0 SDA |
| Chân J10 | PE9 — GPIO / TWI0 SCL |
| Chân K1 | NRST — Reset input (active low) |
| Chân K2 | TST — Test mode (leave floating or pullup in normal use) |
| Chân K3 | JTAGSEL — JTAG/SWD selection (tie high for SWD) |
| Chân K4 | TCK/SWCLK — JTAG TCK / SWD clock |
| Chân K5 | TMS/SWDIO — JTAG TMS / SWD data |
| Chân K6 | TDO — JTAG TDO |
| Chân K7 | TDI — JTAG TDI |
| Chân K8 | XIN — Crystal oscillator input (12 MHz typical) |
| Chân K9 | XOUT — Crystal oscillator output |
| Chân K10 | ERASE — Flash erase pin (active low) |
Ứng dụng tiêu biểu
ATSAME70N21A-CNT phù hợp cho 6 Áp dụngs: Industrial Motor Control, Automotive Infotainment HMI, Building Automation Controllers, Medical Instrumentation, IoT Edge Gateways, Audio Processing and Effects.
Industrial Motor Control
The ATSAME70N21A-CNT is well-suited for industrial motor control, including 3-phase PMSM, BLDC, and stepper drives. Its 300 MHz Cortex-M7 with double-precision FPU executes field-oriented control (FOC) loops well under 1 microsecond per iteration, while the 12-bit 2 MSPS ADC samples phase currents with high bandwidth. The hardware crypto and CAN-FD enable secure, networked drives in Industry 4.0 environments. Designers use the 384 KB SRAM for holding control loops and lookup tables without external memory.
Được đề xuất
Automotive Infotainment HMI
In automotive infotainment and HMI clusters, the ATSAME70N21A-CNT drives TFT LCDs up to WXGA resolution using the integrated 2D-accelerated display controller. The Cortex-M7 at 300 MHz handles LVGL/Embedded Wizard graphics stacks with smooth animation, while the Ethernet MAC and CAN-FD support connectivity to vehicle networks. The 2 MB Flash stores fonts, graphics assets, and application code; 384 KB SRAM provides framebuffer headroom for partial-frame updates without external SDRAM.
Được đề xuất
Building Automation Controllers
Building automation systems (HVAC, lighting, access control panels) benefit from the ATSAME70N21A-CNT's rich peripheral set: Ethernet for BACnet/Modbus TCP, CAN for HVAC zoning, USB for local commissioning, and multiple UARTs for sensor networks. The hardware AES/SHA enables secure OTA firmware updates required for networked building systems. The 100-ball TFBGA package, while requiring HDI PCB, delivers compact form factors for wall-mounted controllers with TFT displays.
Được đề xuất
Medical Instrumentation
Medical devices such as patient monitors, infusion pumps, and diagnostic instruments require deterministic real-time response and high-precision analog measurement - both delivered by the ATSAME70N21A-CNT's 300 MHz Cortex-M7 with FPU and 12-bit 2 MSPS ADC. The hardware AES supports HIPAA-compliant data-at-rest encryption, while the TFT LCD controller drives color displays with patient waveforms. Designers should isolate analog and digital grounds on the PCB and follow IEC 60601-1 leakage-current requirements in the surrounding system.
Được đề xuất
IoT Edge Gateways
IoT edge gateways aggregate sensor data from multiple field buses (CAN, RS-485, I2C) and forward it to cloud platforms over Ethernet or Wi-Fi (via SPI-attached module). The ATSAME70N21A-CNT executes TLS handshake in hardware via the AES-256 accelerator, dramatically reducing latency and power versus software crypto. The 2 MB Flash stores full TLS stacks plus MQTT-SN brokers locally. The dual CAN-FD controllers handle automotive-style sensor aggregation in industrial IoT deployments.
Được đề xuất
Audio Processing and Effects
The Cortex-M7's DSP extensions and double-precision FPU make the ATSAME70N21A-CNT ideal for audio processing: parametric EQ, reverb, dynamics, and multi-channel mixing in professional audio products. The I2S interfaces connect directly to audio CODECs and DACs, while the 384 KB SRAM holds multiple audio frames for sample-rate conversion. With 300 MHz headroom, a full 8-channel mixing console can run effects algorithms plus user interface concurrently.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAME70N21A-CNT — 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 | ATSAME70N20A-CNT | ATSAME70N21B-CNT | ATSAME70J21A-ANT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TFBGA (9x9) | 100-TFBGA (9x9) - same | 100-TFBGA (9x9) - same | 100-TFBGA (9x9) - same |
| Core | Cortex-M7 | Cortex-M7 | Cortex-M7 | Cortex-M7 |
| Max CPU Clock | 300 MHz | 300 MHz | 300 MHz | 300 MHz |
| Flash Memory | 2 MB | 2 MB (N20A density variant) | 2 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB |
| Silicon Revision | A | A (N20A density code) | B (revision update) | A (J21A industrial) |
| Pin Count | 100 | 100 | 100 | 100 |
| Approx. Unit Price @100 | $11.07 | $10.50 (est., similar tier) | $11.07 | $10.80 (est., similar tier) |
Bảo phân biệt quan trọng
- Cortex-M7 with double-precision FPU and 300 MHz clock (vsATSAME70N20A-CNT)
- Silicon revision B update with errata fixes (vsATSAME70N21B-CNT)
- Industrial temperature grade -40C to +105C (vsATSAME70J21A-ANT)
Ghi chú thiết kế
The 100-ball TFBGA at 0.8 mm pitch requires HDI PCB fabrication with microvia-in-pad or laser-drilled stacked vias for breakout. Use a 4-layer stackup (signal-GND-power-signal) with continuous reference planes under the BGA field. Place four 4.7 uF X7R bulk ceramics plus 0.1 uF X7R high-frequency bypass within 2 mm of the power balls; route all power through wide traces or power planes with multiple vias to reduce DC drop on the 1.2 V core rail.
Solder the central die-attach pad (DAP) to a continuous ground copper pour with at least 25 thermal vias (0.3 mm drill, 0.5 mm pitch) for heat extraction. Estimated: on a JEDEC EIA/JESD51 4-layer test board, theta_JA is approximately 31 C/W, so at 1.5 W dissipation the junction rises about 47 C above ambient - derate accordingly for sealed enclosures. For industrial 105 C operation, ensure ambient stays below 58 C.
Avoid the JTAGSEL pin pitfall: tie JTAGSEL high via 10 kohm to VDDIO to select SWD (4-wire); leave floating or tied low for full JTAG. Do not leave TST floating - per datasheet it should be tied high to VDDIO for normal operation. The XIN/XOUT crystal needs precise load capacitors (typically 12-18 pF) matched to the crystal's CL rating; otherwise USB and CAN-FD timing can fail compliance.
Separate the analog and digital 3.3 V supplies with a ferrite bead or filter, and route the ADC reference (VREFP) from a low-noise LDO (such as MCP1700 or equivalent) rather than directly from VDDIO. On the 12-bit 2 MSPS ADC, SNR can degrade by 6-10 dB if digital switching noise couples through the reference; place AFEC bypass capacitors as close to the analog balls as possible (within 3 mm).
Thông tin tuân thủ
ROHS3 compliant per Microchip product page. Industrial temperature grade -40C to +105C. Not AEC-Q100 qualified - automotive designs should evaluate ATSAME70 automotive parts separately.
