ATSAMC21J15A-MNT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
MPN: ATSAMC21J15A-MNT ✓ Hoạt độngATSAMC21J15A-MNT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, designed for deterministic real-time control. Within the broader taxonomy, the Cortex-M0+ sits below Cortex-M3/M4/M7 in performance, and the SAM C21 family targets 5V industrial and automotive-grade CAN nodes. The 'SAM C' series is Microchip's specialty 5V line for noisy-environment applications.
Key features include up to six SERCOM (Serial Communication Interface) modules that can each be configured as UART, SPI, or I2C, plus a CAN-FD peripheral for automotive and industrial networking. The TC (Timer/Counter) block provides PWM and capture channels for motor control and power conversion, while the Event System enables hardware-triggered inter-peripheral signalling without CPU intervention. Analog peripherals include a 12-bit 1 MSPS ADC, 10-bit DAC, and analog comparators. The 64-QFN 9x9 mm package has an exposed pad for improved thermal dissipation.
Typical applications are industrial sensor nodes, building automation controllers, CAN-connected HVAC actuators, low-end motor-control BLDC drivers, battery management slave modules, and 5V-tolerant logic-replacement designs. The wide 2.7V-5.5V supply range also supports battery-powered devices operating from a single Li-Ion cell.
When designing with this part, place decoupling capacitors (100 nF + 1 uF) within 2 mm of every VDD pin and stitch the exposed pad with at least 8 thermal vias to the inner ground plane. Use the OpenOCD or Atmel-ICE debugger and the MPLAB X IDE toolchain to access the SERCOM remap and Event System configuration.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21J15A-MNT — 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 ATSAMC21J15A-MNT (cùng hình factor và footprint) — khác nhau ở Package, ADC, CAN-FD, DAC, SRAM.
ATSAMC21G15A-MNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21J16A-MNT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21J15A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21J17A-MNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21J18A-MNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21E17A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21N18A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21J15A-MNT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ |
| Series | SAM C21 (Functional Safety / FuSa) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| I/O Tolerance | 5V tolerant |
| Khoảng nhiệt độ hoạt động | -40 C to +105 C (Industrial) |
| Hộp | 64-QFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Communication Peripherals | SERCOM (UART/SPI/I2C) + CAN-FD |
| ADC | 12-bit, up to 1 MSPS |
| DAC | 10-bit |
| Timer/Counters | TC (PWM/capture) + TCC |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes (Green) |
Cấu hình chân ATSAMC21J15A-MNT
| Chân 1 | VDDIO — Digital I/O supply voltage |
| Chân 2 | PA00 — GPIO / SERCOM1 PAD0 |
| Chân 3 | PA01 — GPIO / SERCOM1 PAD1 |
| Chân 4 | PA02 — GPIO / SERCOM0 PAD0 / AIN0 |
| Chân 5 | PA03 — GPIO / SERCOM0 PAD1 / AIN1 / VREFA |
| Chân 6 | PA04 — GPIO / SERCOM0 PAD2 / AIN2 |
| Chân 7 | PA05 — GPIO / SERCOM0 PAD3 / AIN3 |
| Chân 8 | PA06 — GPIO / SERCOM0 PAD0 alt / AIN4 |
| Chân 9 | PA07 — GPIO / SERCOM0 PAD1 alt / AIN5 |
| Chân 10 | PA08 — GPIO / SERCOM2 PAD0 / AIN6 |
| Chân 11 | PA09 — GPIO / SERCOM2 PAD1 / AIN7 / VREFB |
| Chân 12 | PA10 — GPIO / SERCOM2 PAD2 / AIN8 |
| Chân 13 | PA11 — GPIO / SERCOM2 PAD3 / AIN9 |
| Chân 14 | VDDIO — Digital I/O supply voltage |
| Chân 15 | VSS — Ground |
| Chân 16 | PA12 — GPIO / SERCOM4 PAD0 |
| Chân 17 | PA13 — GPIO / SERCOM4 PAD1 |
| Chân 18 | PA14 — GPIO / SERCOM3 PAD2 / XOUT32 |
| Chân 19 | PA15 — GPIO / SERCOM3 PAD3 / XIN32 |
| Chân 20 | PA16 — GPIO / SERCOM1 PAD0 alt / I2S FS |
| Chân 21 | PA17 — GPIO / SERCOM1 PAD1 alt / I2S SCK |
| Chân 22 | PA18 — GPIO / SERCOM3 PAD0 / TC4 WO0 |
| Chân 23 | PA19 — GPIO / SERCOM3 PAD1 / TC4 WO1 |
| Chân 24 | PA20 — GPIO / SERCOM5 PAD2 / TC7 WO0 |
| Chân 25 | PA21 — GPIO / SERCOM5 PAD3 / TC7 WO1 |
| Chân 26 | PA22 — GPIO / SERCOM3 PAD0 alt / TC4 WO0 |
| Chân 27 | PA23 — GPIO / SERCOM3 PAD1 alt / TC4 WO1 |
| Chân 28 | PA24 — GPIO / SERCOM5 PAD0 / USB D- |
| Chân 29 | PA25 — GPIO / SERCOM5 PAD1 / USB D+ |
| Chân 30 | VDDIO — Digital I/O supply voltage |
| Chân 31 | VSS — Ground |
| Chân 32 | PB00 — GPIO / SERCOM5 PAD2 alt / AIN12 |
| Chân 33 | PB01 — GPIO / SERCOM5 PAD3 alt / AIN13 |
| Chân 34 | PB02 — GPIO / SERCOM5 PAD0 alt / AIN14 |
| Chân 35 | PB03 — GPIO / SERCOM5 PAD1 alt / AIN15 |
| Chân 36 | PB04 — GPIO / SERCOM3 PAD0 alt / AIN6 |
| Chân 37 | PB05 — GPIO / SERCOM3 PAD1 alt / AIN7 |
| Chân 38 | PB06 — GPIO / SERCOM3 PAD2 alt |
| Chân 39 | PB07 — GPIO / SERCOM3 PAD3 alt |
| Chân 40 | PB08 — GPIO / SERCOM4 PAD0 alt / TC4 WO0 |
| Chân 41 | PB09 — GPIO / SERCOM4 PAD1 alt / TC4 WO1 |
| Chân 42 | PB10 — GPIO / SERCOM4 PAD2 alt / TC5 WO0 |
| Chân 43 | PB11 — GPIO / SERCOM4 PAD3 alt / TC5 WO1 |
| Chân 44 | PB12 — GPIO / SERCOM0 PAD0 alt / TC4 WO0 |
| Chân 45 | PB13 — GPIO / SERCOM0 PAD1 alt / TC4 WO1 |
| Chân 46 | PB14 — GPIO / SERCOM2 PAD0 alt |
| Chân 47 | PB15 — GPIO / SERCOM2 PAD1 alt |
| Chân 48 | PB16 — GPIO / SERCOM5 PAD0 alt / TC6 WO0 |
| Chân 49 | PB17 — GPIO / SERCOM5 PAD1 alt / TC6 WO1 |
| Chân 50 | PB18 — GPIO / SERCOM3 PAD2 alt |
| Chân 51 | PB19 — GPIO / SERCOM3 PAD3 alt |
| Chân 52 | PB20 — GPIO / SERCOM1 PAD2 alt |
| Chân 53 | PB21 — GPIO / SERCOM1 PAD3 alt |
| Chân 54 | VDDIO — Digital I/O supply voltage |
| Chân 55 | VSS — Ground |
| Chân 56 | VDDCORE — Internal core voltage (decoupling) |
| Chân 57 | VDDIO — Digital I/O supply voltage |
| Chân 58 | NRST — Reset input (active low) |
| Chân 59 | SWDIO — Serial Wire Debug I/O |
| Chân 60 | SWCLK — Serial Wire Debug Clock |
| Chân 61 | PA27 — GPIO / SERCOM1 PAD3 alt |
| Chân 62 | PA28 — GPIO / SERCOM5 PAD2 alt |
| Chân 63 | PA29 — GPIO / SERCOM5 PAD3 alt |
| Chân 64 | PA30 — GPIO / SERCOM1 PAD2 alt / SWO |
Ứng dụng tiêu biểu
ATSAMC21J15A-MNT phù hợp cho 7 Áp dụngs: Industrial CAN-FD Sensor Node, Building Automation Controller, Low-Voltage BLDC Motor Driver Slave, 5V Logic-Replacement Upgrade Module, Battery Management Slave / Smart Battery Pack, HVAC Valve and Damper Actuator, IoT Edge Sensor Gateway.
Industrial CAN-FD Sensor Node
The ATSAMC21J15A-MNT is well matched to industrial CAN-FD sensor nodes because its 5V-tolerant I/O interfaces directly with 5V CAN transceivers like the MCP2562FD, eliminating external level shifters. The Cortex-M0+ core at 48 MHz runs CANopen or Modbus stacks with deterministic latency, while the 32 KB Flash stores protocol libraries plus application code. The device's -40C to +105C industrial rating and IEC 61508 SIL 2 Functional Safety documentation support deployments on factory floors and outdoor installations where electrical noise and temperature extremes are common. Compared to a 3.3V-only MCU, the 5V tolerance reduces BOM cost and PCB area in sensor arrays.
Được đề xuất
Building Automation Controller
Building automation systems benefit from the ATSAMC21J15A-MNT's combination of 5V I/O tolerance, multiple SERCOM ports, and CAN-FD support. Six configurable SERCOM modules allow simultaneous connections to RS-485 transceivers, SPI sensor hubs, I2C EEPROMs, and UART commissioning interfaces without extra multiplexer logic. The 4 KB SRAM comfortably holds BACnet MS/TP or KNX stack buffers, and the 32 KB Flash stores application firmware with room for OTA staging. Power consumption under 10 mA active at 48 MHz supports battery-backed HVAC and access-control panels.
Được đề xuất
Low-Voltage BLDC Motor Driver Slave
In low-voltage BLDC motor driver subsystems the ATSAMC21J15A-MNT acts as a slave commutation controller, leveraging its TCC (Timer/Counter for Control) peripherals to generate center-aligned PWM signals and synchronize with the Event System for hardware-triggered ADC sampling on zero-cross events. The 12-bit 1 MSPS ADC simultaneously measures back-EMF, current shunt, and DC-bus voltage, while the SERCOM channels stream telemetry to a master controller over UART or CAN-FD. Compared to a dedicated motor-control IC, the SAM C21 provides flexibility for custom commutation algorithms at modest cost.
Được đề xuất
5V Logic-Replacement Upgrade Module
The ATSAMC21J15A-MNT is an excellent drop-in modernization path for designs that previously used legacy 8-bit/16-bit 5V microcontrollers. Its 5V-tolerant I/O ports connect directly to existing 5V peripheral footprints, preserving the proven analog front-end while adding ARM Cortex-M0+ computational headroom, CAN-FD, and modern peripherals. Designers can reuse their 5V rails, sensors, and actuator drivers, then incrementally port firmware using the SAM C21 ASF or MPLAB Harmony code bases. The 64-QFN 9x9 mm package footprint is compatible with retrofit adapters that mimic classic QFP layouts.
Được đề xuất
Battery Management Slave / Smart Battery Pack
In multi-cell battery management systems the ATSAMC21J15A-MNT functions as a slave monitoring MCU, sampling cell voltages with its 12-bit ADC and balancing cells via GPIO-controlled MOSFETs. The wide 2.7V-5.5V supply range supports direct operation from a single Li-Ion cell (3.0V-4.2V) or a 5V external rail. The Event System hardware-triggers ADC conversions synchronously with PWM balancing, offloading the CPU and reducing active power consumption. CAN-FD or I2C back to a master pack controller allows simple, robust daisy-chain telemetry at 1 Mbit/s.
Được đề xuất
HVAC Valve and Damper Actuator
HVAC valve and damper actuators rely on the ATSAMC21J15A-MNT's robust -40C to +105C temperature range, 5V tolerance for analog output stages, and 12-bit ADC for closed-loop position feedback. The TCC peripherals generate the precise PWM needed for triac-fired motor drivers, while the SERCOM ports support Modbus RTU over RS-485 for building-management integration. Compared to discrete analog controllers, the SAM C21 enables software-defined control curves, remote calibration, and predictive maintenance without external EEPROM. The 32 KB Flash holds multiple actuator profiles for varied installation scenarios.
Được đề xuất
IoT Edge Sensor Gateway
Industrial IoT edge gateways benefit from the ATSAMC21J15A-MNT's combination of Cortex-M0+ efficiency and rich connectivity. The 32-bit core performs local sensor aggregation, threshold detection, and MQTT-SN or CoAP frame encoding at sub-millisecond latency. The six SERCOM modules accept simultaneous SPI sensor chains, I2C EEPROM, and UART debug consoles. The 5V tolerance allows direct connection to legacy 5V industrial busses while the CAN-FD peripheral bridges to higher-bandwidth automotive or industrial CAN networks. The Functional Safety features make it usable in safety-relevant applications.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21J15A-MNT — 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 | ATSAMC21G15A-MNT | ATSAMC21J16A-MNT | ATSAMC21E17A-AUT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) |
| SRAM | 4 KB | 4 KB | 8 KB (+100%) | 16 KB (+300%) |
| Functional Safety (FuSa) | Yes (IEC 61508 SIL 2) | No (non-FuSa) | Yes | Yes (AEC-Q100) |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +125C (AEC-Q100) |
| CAN-FD | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- 5V-tolerant I/O with Functional Safety documentation (vsATSAMC21G15A-MNT)
- In-family Flash upgrade without PCB rework (vsATSAMC21J16A-MNT)
- Industrial temperature grade up to +105C (vsATSAMC21G15A-MNT)
- CAN-FD and six SERCOMs in a single 5V MCU (vsATSAMC21E17A-AUT)
Ghi chú thiết kế
Place a 100 nF X7R ceramic capacitor within 2 mm of every VDDIO pin and a single 1 uF X5R bulk capacitor near the package exposed pad. The exposed pad must be soldered to a continuous ground plane with at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) for stable 48 MHz operation and reduced EMI. Use a low-ESR regulator such as MCP1700 for 3.3V rails; the SAM C21 core logic draws ~10 mA active at 48 MHz.
Estimated: at maximum active load (48 MHz, all peripherals enabled) the SAM C21 draws ~15 mA from 3.3V. Power dissipation is therefore approximately 50 mW, well within the thermal capability of the 64-QFN 9x9 mm package (theta_JA ~30 C/W on a 4-layer JEDEC test board). Junction temperature rise above ambient stays below 1.5 C - no heatsink required. Verify on the actual PCB if reduced copper area is used.
Route SWDIO and SWCLK as a 2-wire debug pair with ground shielding; keep total length under 50 mm and avoid stubs. The CAN-FD bus requires impedance-controlled routing (120 ohm differential) with termination at both ends; place the MCP2562FD transceiver within 10 mm of the CAN pins. Keep SERCOM SPI traces short (under 30 mm) and avoid parallel routing with motor PWM signals to prevent coupling noise.
The ATSAMC21J15A-MNT's GCLK (Generic Clock Controller) must be configured before SERCOM and TCC peripherals are enabled - the startup default clock is the 48 MHz DFLL, which may be disabled if NVM user-row settings are wrong. Verify the NVM BOOTPROT setting matches application requirements; the 32 KB Flash variant cannot boot from offset > 28 KB without configuration. Always enable the WDT (Watchdog Timer) in hardware for industrial safety integrity.
Place the 32.768 kHz crystal (XIN32/XOUT32 on PA14/PA15) within 5 mm of the IC with symmetric trace lengths and ground shielding. Add a 1 MOhm parallel resistor across the crystal if the crystal load capacitance is below 7 pF. Keep the analog reference pins (VREFA, VREFB) bypassed with 100 nF + 1 uF capacitors and isolated from noisy digital traces. Route the analog inputs (AINx) away from PWM outputs to preserve ADC SNR above 70 dB.
Thông tin tuân thủ
RoHS compliant and Green (lead-free / halogen-free) per Microchip product page. Industrial grade -40C to +105C, not AEC-Q100. For automotive AEC-Q100 designs, use ATSAMC21E or ATSAMC21N variants.
