ATSAME70J21B-AN - 300MHz Cortex-M7 MCU 2MB Flash | Microchip
MPN: ATSAME70J21B-AN ✓ NakahandaATSAME70J21B-AN Ulas
What is a Cortex-M7 microcontroller? A Cortex-M7 microcontroller is a 32-bit RISC processor core from Arm designed for high-performance embedded applications requiring DSP, single-precision/double-precision floating-point arithmetic, and deterministic interrupt response. The Cortex-M7 sits above Cortex-M4 in the Arm Cortex-M hierarchy and below Cortex-A application processors. Within the broader taxonomy, the ATSAME70J21B-AN belongs to the following chain: ARM Cortex-M7 -> 32-bit RISC microcontroller -> microcontroller unit (MCU) -> semiconductor. The SAM E70 family specifically targets motor control, industrial networking, audio, and graphical HMI designs where M7-class compute exceeds M4 capabilities.
Key features of the ATSAME70J21B-AN include a 16 KB instruction cache and 16 KB data cache with single-cycle access from flash through the tightly-coupled memory (TCM) interface, a single-precision hardware Floating Point Unit (FPU), DSP extensions, and a Memory Protection Unit (MPU). The peripheral set includes a high-speed USB 2.0 Full-Speed and High-Speed with on-chip PHY, a 10/100 Mbps Ethernet MAC with IEEE 1588 support, a CAN-FD controller, multiple USART/UART/SPI/TWI/I2S interfaces, a 12-bit ADC, and a 32-bit timer/counter block. The integrated quadrature decoder and PWM channels are tailored for field-oriented motor control loops.
The architecture combines a 6-layer bus matrix with dedicated peripheral DMA channels and an event system to support deterministic real-time performance. The dual-bank Flash with read-while-write (RWW) capability allows live firmware updates without halting application code, which is valuable for industrial field devices requiring in-service upgrades.
Typical applications include industrial motor drives (BLDC, PMSM, AC induction), factory automation controllers, building automation gateways, audio processing equipment, point-of-sale terminals, and high-end graphical HMI panels. The combination of Cortex-M7 DSP, Ethernet, USB, and CAN-FD makes it well-suited to connected industrial nodes.
When designing with this part, plan for proper decoupling: 100 nF on each VDD pin plus a 4.7 µF bulk capacitor. The 64-pin LQFP exposes fewer peripherals than the larger 144-pin variants, so confirm the specific peripheral mix against the pinout table before selecting the package.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application notes, and engineering design guidance not consolidated on a single manufacturer page.
Mga alternatibo na pwedeng ilagay na ATSAME70J21B-AN — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ATSAME70J21B-AN (parehas na form factor at footprint) — pagkakaiba sa Operating Temperature, Ethernet, Mounting Type, Package, CAN.
ATSAME70J20B-AN
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATSAME70J19B-AN
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATSAME70J21A-ANT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATSAME70J19A-ANT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATSAME70Q21B-AN
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATSAME70J21B-AN Mga Pinakamataas na Rating at Electrical Characteristics
| Core Architecture | ARM Cortex-M7 with FPU |
| Operating Frequency | 300 MHz (max) |
| Program Memory | 2 MB (2M x 8) Flash |
| SRAM | 384 KB |
| Volte ng Pagbibigay | 1.62 V to 3.6 V |
| Packhaging | 64-pin LQFP (10x10 mm) |
| Temperature na Operasyon | -40 C to +105 C (industrial) |
| Cache | 16 KB I-cache + 16 KB D-cache |
| FPU | Single-precision hardware FPU |
| DSP Extensions | Yes (Arm SIMD) |
| MPU | Yes |
| USB | USB 2.0 High-Speed with on-chip PHY |
| Ethernet | 10/100 Mbps MAC with IEEE 1588 |
| CAN | CAN-FD controller |
| Uri ng Pagpapasok | Surface Mount |
| Tindminan RoHS | Compliant |
| Moisture Sensitivity Level | MSL 3 (per JEDEC J-STD-020) |
Gabay sa Pin Configuration ng ATSAME70J21B-AN 64-pin lqfp (10x10 mm)
Pin configuration para sa ATSAME70J21B-AN (64-pin lqfp (10x10 mm) package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa ATSAME70J21B-AN.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ATSAME70J21B-AN ay nararapat para sa 6 aplikasyons: Industrial Motor Control (BLDC / PMSM / AC Induction), Industrial Ethernet Gateways (EtherCAT / PROFINET / Modbus TCP), Audio Processing and DSP Applications, High-Speed USB Peripherals and Test Equipment, Automotive Body and Chassis ECUs, Graphical HMI Panels and Smart Appliances.
Industrial Motor Control (BLDC / PMSM / AC Induction)
The ATSAME70J21B-AN is well-suited to field-oriented control (FOC) loops for BLDC, PMSM, and AC induction motors because its 300 MHz Cortex-M7 core with hardware single-precision FPU executes the Park/Clarke transforms and PI controllers well within the typical 10 to 20 kHz PWM cycle. The 384 KB SRAM, configurable as tightly-coupled memory (TCM), delivers single-cycle access for the control loop, eliminating cache miss jitter that would otherwise distort the current waveform. With the integrated PWM channels, quadrature decoder, and 12-bit ADC capable of sub-microsecond sampling, the device closes the current loop with deterministic latency. Designers pair this MCU with gate drivers such as the MCP8024 and a three-phase IGBT or MOSFET inverter for a complete 1 kW class drive.
Inirekomenda
Industrial Ethernet Gateways (EtherCAT / PROFINET / Modbus TCP)
The ATSAME70J21B-AN's integrated 10/100 Mbps Ethernet MAC with IEEE 1588 hardware timestamping supports industrial Ethernet protocols including EtherCAT, PROFINET, and Modbus TCP. The Cortex-M7's 300 MHz performance is sufficient to run a TCP/IP stack plus an application layer simultaneously, while the 2 MB Flash stores the full protocol stack, web server, and application code without external memory expansion. The MPU enables isolation between the network stack and the application task, improving security and reliability. Designers typically add an external Ethernet PHY (such as a KSZ8081) connected via RMII and an RJ45 with integrated magnetics.
Inirekomenda
Audio Processing and DSP Applications
The Cortex-M7 core's DSP extensions and single-precision hardware FPU enable real-time audio processing at sample rates up to 48 kHz with headroom for FIR filters, FFT analysis, and noise reduction. The I2S interface connects directly to audio codecs such as the SGTL5000 for stereo line-in/line-out plus headphone drive. The 2 MB Flash accommodates audio processing libraries, codecs, and lookup tables without external memory. The 384 KB SRAM provides working memory for audio buffers and DSP coefficient storage. This makes the ATSAME70J21B-AN a strong fit for professional audio equipment, hearing aids, and speech recognition front-ends.
Inirekomenda
High-Speed USB Peripherals and Test Equipment
The ATSAME70J21B-AN integrates a USB 2.0 High-Speed controller with on-chip PHY, eliminating the need for an external transceiver and enabling 480 Mbps data transfer for USB peripherals such as data loggers, oscilloscopes, and industrial cameras. The Cortex-M7 core buffers high-speed data into the 384 KB SRAM, and the 2 MB Flash supports USB stack plus application firmware. The device's high throughput is also valuable for data acquisition systems streaming ADC samples to a host PC. Designers pair the part with USB Type-C connector and ESD protection for a complete USB peripheral.
Inirekomenda
Automotive Body and Chassis ECUs
The ATSAME70J21B-AN's CAN-FD controller supports modern automotive networks at up to 5 Mbps, and its Cortex-M7 DSP capability enables sensor fusion and signal conditioning for body control modules. The wide operating temperature range of -40 C to +105 C suits under-hood and chassis applications. The 64-LQFP package fits space-constrained ECU housings, and the 2 MB Flash supports AUTOSAR or custom real-time operating systems. Designers add external CAN transceivers (such as the MCP2562FD) and LIN transceivers for body networks. For AEC-Q100 qualified variants, Microchip offers automotive-grade equivalents in the SAM E70 family.
Inirekomenda
Graphical HMI Panels and Smart Appliances
The ATSAME70J21B-AN's 300 MHz Cortex-M7 with 2 MB Flash drives graphical user interfaces for HMI panels, appliance control boards, and building automation touchscreens. The device can render simple graphical elements and run LVGL or emWin without an external graphics controller. The USB and Ethernet connectivity support remote firmware update and cloud telemetry, while the 12-bit ADC reads touch panel and sensor inputs. The 64-LQFP package balances peripheral count with compact PCB area, ideal for 3.5-inch to 5-inch touch panel designs.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ATSAME70J21B-AN — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ATSAME70J20B-AN | ATSAME70J19B-AN | ATSAME70J21A-ANT | ATSAME70J19A-ANT | ATSAME70Q21B-AN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 | 64-LQFP (10x10 mm) - same |
| 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 | 512 KB | 2 MB |
| SRAM | 384 KB | 384 KB | 256 KB | 384 KB | 256 KB | 384 KB |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Ethernet MAC | 10/100 Mbps + IEEE 1588 | 10/100 Mbps + IEEE 1588 | 10/100 Mbps + IEEE 1588 | 10/100 Mbps + IEEE 1588 | 10/100 Mbps + IEEE 1588 | 10/100 Mbps + IEEE 1588 |
| USB | USB 2.0 HS + PHY | USB 2.0 HS + PHY | USB 2.0 HS + PHY | USB 2.0 HS + PHY | USB 2.0 HS + PHY | USB 2.0 HS + PHY |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C |
Pangunahing mga Pagkakaiba
- Largest Flash in 64-LQFP footprint within SAM E70 family (kumpara saATSAME70J20B-AN)
- Dual-bank Flash with read-while-write (RWW) (kumpara saATSAM4S16C (Cortex-M4))
- On-chip USB 2.0 High-Speed PHY and Ethernet MAC (kumpara saATSAMD51 family)
Talaan ng Disenyo
Place a 100 nF decoupling capacitor on each VDD pin and a single 4.7 µF bulk capacitor near the MCU. The ATSAME70J21B-AN has separate VDDCORE and VDDIO pins; VDDCORE requires a 1.2 V regulator while VDDIO accepts 1.62 V to 3.6 V. Per the SAM E70 family datasheet, VDDCORE must be established before or simultaneously with VDDIO to avoid latch-up. Use a power management IC such as the MCP16502 to sequence the rails correctly.
Route the 64-LQFP package on a 4-layer PCB with continuous ground plane beneath the device. The LQFP has 0.5 mm pitch; use 0.20 mm traces and 0.10 mm clearance on the inner layers. For Ethernet, route RMII traces with matched lengths within 50 mils and keep them away from switching nodes. The USB DP/DM traces should be 90 ohm differential with no splits, and the on-chip PHY requires a precise 12 kHz external reference resistor on the XIN32KSO pin.
Do not assume the 64-LQFP variant exposes the same peripheral set as the 144-LQFP variants. The smaller package omits several I/O lines and peripheral instances; consult the pin multiplexing table in section 7 of the datasheet before designing the schematic. Also, the flash wait state must be configured per the formula in the datasheet for the chosen VDDCORE voltage to avoid instruction fetch failures above 150 MHz.
Impormasyon ng Pagsunod sa Kautusan
RoHS and REACH compliant per Microchip product page. Lead-free reflow profile per JEDEC J-STD-020 MSL 3. AEC-Q100 not qualified for this industrial-grade part — Microchip offers automotive-graded SAM E70 variants separately. Halogen-free status not explicitly stated in provided data.
