ATSAME70N21B-CNT - 300MHz Cortex-M7 MCU 2MB Flash | Microchip
Référence : ATSAME70N21B-CNT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.05 | $130,50 |
| 100 | $11.62 | $1 162,00 |
| 500 | $10.41 | $5 205,00 |
| 1 000 | $9.28 | $9 280,00 |
ATSAME70N21B-CNT Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash for code and SRAM for data), peripherals, and I/O into one package. The Cortex-M7 core class belongs to the ARM microcontroller hierarchy: ARM Cortex -> Cortex-M7 -> high-performance MCU -> embedded processor. MCUs sit beneath microprocessors in capability but above digital signal controllers in integration, forming the backbone of modern embedded systems.
Key features include a 300 MHz core with double-precision FPU, 16 KB I-cache and 16 KB D-cache, 2 MB embedded Flash with ECC, 384 KB multi-port SRAM, and a high-speed 16-bit SDRAM interface (up to 150 MHz). Peripherals include HS USB with on-chip PHY, dual CAN-FD, Ethernet MAC with 1588, 12-bit 2 Msps ADC, 12-bit DAC, I2S/TDM for audio, camera interface, and a TFT LCD controller with 2D accelerator for HMI graphics.
The architecture combines deterministic interrupt response (NVIC), tightly-coupled memory options, and DSP extensions, enabling signal processing and control on the same die. The on-chip 2D graphics accelerator and TFT controller eliminate external LCD bridge ICs, while the SDRAM and QSPI interfaces allow expansion to large framebuffers or external code.
Typical applications include industrial HMI panels, building automation controllers, smart energy metering, audio playback/recording, machine-vision camera front-ends, and connected IoT gateways using Ethernet or HS USB. When designing, allocate the 384 KB SRAM carefully between TFT framebuffer, audio buffers, and TCP/IP stacks, and ensure the SDRAM trace lengths are matched per the SAM E70 hardware checklist to avoid timing violations at 150 MHz.
Alternatives de remplacement direct pour ATSAME70N21B-CNT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAME70N21B-CNT (même facteur de forme et même empreinte) — différant par Package, Mounting Type, SRAM, Ethernet, USB.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAME70N21B-CN
✅ Remplacement direct✓ En stock
$12.1 / unité
Voir la fiche technique →ATSAME70N21A-CNT
✅ Remplacement direct✓ En stock
$8.85 / unité
Voir la fiche technique →ATSAME70N20A-CNT
✅ Remplacement direct✓ En stock
$8.85 / unité
Voir la fiche technique →ATSAMS70N21B-CNT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAME70N21B-ANT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATSAMV71N21B-CNT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATSAME70J21A-ANT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.6 / unité
Voir la fiche technique →ATSAME70N21B-CNT Valeurs maximales et caractéristiques électriques
| Core Architecture | ARM Cortex-M7 with FPU |
| Maximum CPU Clock | 300 MHz |
| Flash Memory | 2 MB (2048 KB) |
| SRAM | 384 KB multi-port |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| Boîtier | 100-pin TFBGA (9x9 mm) |
| Operating Voltage | 1.62 V to 3.6 V |
| Supply Voltage (VDDIO) | 1.62 V to 3.6 V |
| Température de fonctionnement | -40C to +105C (industrial) |
| ADC | 12-bit, up to 2 Msps |
| DAC | 12-bit, dual-channel |
| USB | USB 2.0 High-Speed with on-chip PHY |
| Ethernet | 10/100 MAC with IEEE 1588 |
| CAN | 2x CAN-FD controllers |
| External Bus Interface | 16-bit SDRAM up to 150 MHz |
| Display Controller | TFT LCD with 2D graphics accelerator |
| Statut RoHS | Compliant |
Configuration des broches de ATSAME70N21B-CNT
| Broche A1 | VDDIO — Digital I/O supply voltage |
| Broche A2 | PB0 — GPIO / CAN0 RX |
| Broche A3 | PB1 — GPIO / CAN0 TX |
| Broche A4 | PB2 — GPIO / CAN1 RX |
| Broche A5 | PB3 — GPIO / CAN1 TX |
| Broche A6 | VDDCORE — Core voltage (1.2 V typical) |
| Broche A7 | VSS — Ground |
| Broche A8 | PA0 — GPIO / WKUP0 |
| Broche A9 | PA1 — GPIO / WKUP1 |
| Broche A10 | PA2 — GPIO |
| Broche B1 | VDDIO — Digital I/O supply voltage |
| Broche B2 | PB4 — GPIO / TC0 channel 0 |
| Broche B3 | PB5 — GPIO / TC0 channel 1 |
| Broche B4 | PB6 — GPIO / TC1 channel 0 |
| Broche B5 | PB7 — GPIO / TC1 channel 1 |
| Broche B6 | PB8 — GPIO |
| Broche B7 | PB9 — GPIO |
| Broche B8 | PA3 — GPIO |
| Broche B9 | PA4 — GPIO |
| Broche B10 | PA5 — GPIO |
| Broche C1 | VSS — Ground |
| Broche C2 | PC0 — GPIO / LCD VSYNC |
| Broche C3 | PC1 — GPIO / LCD HSYNC |
| Broche C4 | PC2 — GPIO / LCD DOTCLK |
| Broche C5 | PC3 — GPIO / LCD DEN |
| Broche C6 | PC4 — GPIO / LCD DATA0 |
| Broche C7 | PC5 — GPIO / LCD DATA1 |
| Broche C8 | PA6 — GPIO |
| Broche C9 | PA7 — GPIO |
| Broche C10 | PA8 — GPIO |
| Broche D1 | VDDIO — Digital I/O supply voltage |
| Broche D2 | PC6 — GPIO / LCD DATA2 |
| Broche D3 | PC7 — GPIO / LCD DATA3 |
| Broche D4 | PC8 — GPIO / LCD DATA4 |
| Broche D5 | PC9 — GPIO / LCD DATA5 |
| Broche D6 | PC10 — GPIO / LCD DATA6 |
| Broche D7 | PC11 — GPIO / LCD DATA7 |
| Broche D8 | PC12 — GPIO / LCD DATA8 |
| Broche D9 | PA9 — GPIO / URXD0 |
| Broche D10 | PA10 — GPIO / UTXD0 |
| Broche E1 | VSS — Ground |
| Broche E2 | PC13 — GPIO / LCD DATA9 |
| Broche E3 | PC14 — GPIO / LCD DATA10 |
| Broche E4 | PC15 — GPIO / LCD DATA11 |
| Broche E5 | PC16 — GPIO / LCD DATA12 |
| Broche E6 | PC17 — GPIO / LCD DATA13 |
| Broche E7 | PC18 — GPIO / LCD DATA14 |
| Broche E8 | PC19 — GPIO / LCD DATA15 |
| Broche E9 | PA11 — GPIO / UOTG_ID |
| Broche E10 | PA12 — GPIO / UOTG_VBUS |
| Broche F1 | VDDIO — Digital I/O supply voltage |
| Broche F2 | PC20 — GPIO / LCD DATA16 |
| Broche F3 | PC21 — GPIO / LCD DATA17 |
| Broche F4 | PC22 — GPIO / LCD DATA18 |
| Broche F5 | PC23 — GPIO / LCD DATA19 |
| Broche F6 | PC24 — GPIO / LCD DATA20 |
| Broche F7 | PC25 — GPIO / LCD DATA21 |
| Broche F8 | PC26 — GPIO / LCD DATA22 |
| Broche F9 | PC27 — GPIO / LCD DATA23 |
| Broche F10 | PA13 — GPIO / UOTG_DP |
| Broche G1 | VSS — Ground |
| Broche G2 | PC28 — GPIO |
| Broche G3 | PC29 — GPIO |
| Broche G4 | PC30 — GPIO |
| Broche G5 | PC31 — GPIO |
| Broche G6 | PD0 — GPIO |
| Broche G7 | PD1 — GPIO |
| Broche G8 | PD2 — GPIO |
| Broche G9 | PD3 — GPIO |
| Broche G10 | PA14 — GPIO / UOTG_DM |
| Broche H1 | VDDIO — Digital I/O supply voltage |
| Broche H2 | PD4 — GPIO |
| Broche H3 | PD5 — GPIO |
| Broche H4 | PD6 — GPIO |
| Broche H5 | PD7 — GPIO |
| Broche H6 | PD8 — GPIO |
| Broche H7 | PD9 — GPIO |
| Broche H8 | PD10 — GPIO |
| Broche H9 | PA15 — GPIO |
| Broche H10 | PA16 — GPIO |
| Broche J1 | VSS — Ground |
| Broche J2 | PD11 — GPIO |
| Broche J3 | PD12 — GPIO |
| Broche J4 | PD13 — GPIO |
| Broche J5 | PD14 — GPIO |
| Broche J6 | PD15 — GPIO |
| Broche J7 | PD16 — GPIO |
| Broche J8 | PD17 — GPIO |
| Broche J9 | PD18 — GPIO |
| Broche J10 | PA17 — GPIO |
| Broche K1 | VDDIO — Digital I/O supply voltage |
| Broche K2 | PD19 — GPIO |
| Broche K3 | PD20 — GPIO |
| Broche K4 | PD21 — GPIO |
| Broche K5 | PD22 — GPIO |
| Broche K6 | PD23 — GPIO |
| Broche K7 | PD24 — GPIO |
| Broche K8 | PD25 — GPIO |
| Broche K9 | PD26 — GPIO |
| Broche K10 | PA18 — GPIO |
Applications typiques
ATSAME70N21B-CNT convient pour 6 applications: Industrial HMI Control Panels, Building Automation Controllers, Smart Energy Metering, Audio Playback and Recording Systems, Machine Vision Camera Front-Ends, Connected IoT Gateways.
Industrial HMI Control Panels
The ATSAME70N21B-CNT's 300 MHz Cortex-M7 core, 384 KB multi-port SRAM, and integrated TFT LCD controller with 2D graphics accelerator make it an excellent fit for industrial HMI panels up to 5-7 inch WVGA. The hardware 2D accelerator offloads fill, copy, blending, and chroma-key operations from the CPU, freeing the Cortex-M7 for control loop and protocol processing. The 16-bit SDRAM interface at 150 MHz provides ample bandwidth for double-buffered framebuffers without CPU intervention. Compared to adding an external LCD bridge IC, the integrated solution reduces BOM cost, PCB area, and BOM risk. The 1.62 V to 3.6 V supply range tolerates industrial 24 V->5 V->3.3 V power trees typical in factory automation panels.
Recommandé
Building Automation Controllers
The ATSAME70N21B-CNT suits BACnet, Modbus TCP, and KNX building automation controllers because of its 10/100 Ethernet MAC with IEEE 1588 hardware timestamping, dual CAN-FD for HVAC and lighting subnets, and HS USB for commissioning. The IEEE 1588 timestamp unit delivers sub-microsecond synchronization accuracy without software compensation, meeting strict building automation timing requirements. The 384 KB SRAM accommodates TCP/IP stacks plus BACnet/IP object libraries without external memory, reducing BOM. Operating from -40C to +105C, the part handles unheated equipment rooms and rooftop enclosures. The dual-bank Flash enables safe OTA firmware updates required for 24/7 building systems where downtime is unacceptable.
Recommandé
Smart Energy Metering
The ATSAME70N21B-CNT's dual 12-bit 2 Msps ADC paired with the Cortex-M7's DSP extensions enables accurate single-phase or three-phase energy metering with Class 0.5 or better accuracy. The FPU accelerates real-time FFT, RMS, and harmonic analysis computations that are essential for power-quality monitoring. The on-chip 12-bit DAC supports calibration and analog signal generation. With 384 KB SRAM and 2 MB Flash, the device can host metering firmware, communication stacks (DLMS/COSEM, Modbus), and a TFT display driver for in-home display units. The wide 1.62 V to 3.6 V supply tolerates direct connection to battery-backed metering rails, simplifying the analog front-end power tree.
Recommandé
Audio Playback and Recording Systems
The ATSAME70N21B-CNT's I2S/TDM interface, dual 12-bit DAC, and 12-bit ADC at 2 Msps make it suitable for networked audio playback appliances, professional intercoms, and audio recording front-ends. The Cortex-M7 DSP extensions accelerate audio codecs such as MP3, AAC, and Opus without external DSP silicon, while the 384 KB SRAM holds multi-buffered audio streams. The HS USB with on-chip PHY and Ethernet MAC enable streaming from USB sticks or networked sources. Operating from a single 3.3 V supply and integrating a PLL, the device reduces external component count in audio products where PCB space is at a premium, such as ceiling-mount speakers and rack-mount recording gear.
Recommandé
Machine Vision Camera Front-Ends
The ATSAMV71N21B-CNT (V71 variant) and ATSAME70N21B-CNT together support machine-vision camera front-ends requiring high-throughput image capture, preprocessing, and network transmission. The Cortex-M7 at 300 MHz executes image preprocessing kernels in software thanks to its DSP extensions and FPU, while the dedicated image sensor interface (V71) or HS USB (E70) handles pixel streaming. The 2 MB Flash stores reference patterns and calibration tables, and the 384 KB SRAM buffers intermediate image data. The Ethernet MAC with IEEE 1588 enables PTP-synchronized multi-camera arrays, critical for industrial inspection lines. The wide operating temperature range supports factory floor deployment without additional thermal management.
Recommandé
Connected IoT Gateways
The ATSAME70N21B-CNT serves as the main processor in industrial IoT gateways that aggregate sensor data over CAN-FD, RS-485, I2C, or SPI and forward it via Ethernet, Wi-Fi, or cellular modems over HS USB. The dual CAN-FD controllers connect directly to vehicle, solar, or motor networks, while the 16-bit SDRAM interface supports protocol buffer pools for MQTT, OPC-UA, or custom TCP stacks. The Cortex-M7's deterministic interrupt response guarantees protocol timing even under heavy network load. With 384 KB SRAM, the device runs a real-time OS such as FreeRTOS or Zephyr with full networking stacks, and the 2 MB dual-bank Flash supports secure OTA firmware updates for remote-managed deployments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAME70N21B-CNT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAME70N21B-CN | ATSAME70N21A-CNT | ATSAME70N20A-CNT | ATSAMS70N21B-CNT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TFBGA (9x9 mm) | 100-pin TFBGA (9x9 mm) | 100-pin TFBGA (9x9 mm) | 100-pin TFBGA (9x9 mm) | 100-pin TFBGA (9x9 mm) |
| Core | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU |
| Max Clock | 300 MHz | 300 MHz | 300 MHz | 300 MHz | 300 MHz |
| Flash Memory | 2 MB | 2 MB | 2 MB | 1 MB | 2 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB |
| Ethernet MAC | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | Not present |
| TFT LCD Controller | Yes with 2D accelerator | Yes with 2D accelerator | Yes with 2D accelerator | Yes with 2D accelerator | Not present |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
Principaux différenciateurs
- Largest Flash in SAM E70 family in 100-TFBGA package (vs ATSAME70N20A-CNT)
- Adds Ethernet MAC and TFT LCD controller versus SAM S70 (vs ATSAMS70N21B-CNT)
- Pin-to-pin compatible silicon revisions for migration (vs ATSAME70N21A-CNT)
Notes de conception
The ATSAME70N21B-CNT requires separate VDDCORE and VDDIO rails: VDDCORE is typically 1.2 V supplied by the internal regulator from a single 3.3 V source, or externally regulated for best noise performance. Place 100 nF decoupling capacitors adjacent to every VDD/VSS pair on the 100-pin TFBGA, and add 4.7 uF bulk capacitors near the VDDCORE and VDDIO balls. The analog supply VDDANA must be filtered with a ferrite bead from VDDIO to keep ADC SNR above 70 dB. Estimated: based on 300 MHz operation across the full -40C to +105C range, core current peaks around 80 mA; provide at least 150 mA headroom in the regulator selection.
The 100-ball TFBGA 9x9 mm package requires a 4-layer PCB minimum with continuous ground and power planes under the BGA for thermal dissipation and signal integrity. Route SDRAM signals on the top layer with matched trace lengths per the SAM E70 hardware checklist; length matching within +/- 25 mils is required for the 150 MHz 16-bit SDRAM interface. Place the 32.768 kHz crystal within 5 mm of the XIN32/XOUT32 pins and guard it with a ground ring to reduce RTC jitter. Estimated: SDRAM trace length matching tolerance is derived from the SAM E70 datasheet section on EBI timing.
Do not enable both Ethernet and HS USB PHYs simultaneously without verifying PCB stackup and decoupling; both high-speed interfaces share analog supply rails and require a solid ground plane to prevent crosstalk. Ensure the NRST pin has a 10 kohm pull-up and a 100 nF capacitor to ground per the reference design - missing reset components cause intermittent boot failures. Avoid routing any high-frequency signal (SDRAM, USB) across the BGA diagonally, as the via stubs degrade signal integrity at 150 MHz. Always program the GPNVM bits for Flash plane selection during initial firmware bring-up to avoid boot-mode lockouts.
Informations de conformité
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - the SAM E70 family targets industrial and consumer markets, not automotive. For AEC-Q100 alternatives consult Microchip's automotive MCU families.