ATSAMC21E16A-AUT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAMC21E16A-AUT ✓ Hoạt độngATSAMC21E16A-AUT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and peripherals on one die. Cortex-M0+ is an ARM processor core optimized for energy efficiency and deterministic interrupt response, widely used in cost-sensitive embedded designs. The SAM C21 family extends the Cortex-M0+ line to 5V I/O tolerance, making it easier to interface with industrial sensors, motor drivers, and 24V logic without level shifters.
Key differentiating features include a 5V-tolerant I/O structure (operating from 2.7V to 5.5V), a full-speed USB 2.0 device interface, a CAN-FD controller for automotive-grade networking, six SERCOM modules that can each be configured as UART, SPI, or I2C, and a 12-bit ADC with up to 10 channels. A single-cycle hardware multiplier, Micro Trace Buffer, and Memory Protection Unit (MPU) support real-time control and safety-oriented firmware development.
Architecturally, the device is built around the Cortex-M0+ core with a 2-stage pipeline, integrated Nested Vectored Interrupt Controller (NVIC), and Microchip's standard SAM D/C peripheral set. The 48 MHz operation delivers approximately 45 DMIPS while keeping active current low, and the on-chip voltage regulator supports both low-power Sleep, Standby, and Backup modes for battery-driven nodes. The functional safety (FuSa) variant labeling indicates documentation support for IEC 60730 class-B safety libraries.
Typical applications include CAN-FD-connected industrial sensor nodes, building automation controllers, low-end automotive body and HVAC modules, USB human-interface devices, small motor-control BLDC boards, and battery-backed metering. The 5V tolerance and integrated CAN-FD distinguish the C21 from the lower-voltage SAMD20/D21 family for harsh-environment designs.
When designing with this part, use the ASF4 / MCC peripheral libraries to configure SERCOM instances and validate your CAN-FD timing against the Bosch CAN-FD specification. Decouple VDDIO and VDDCORE with separate 100 nF capacitors placed within 3 mm of the pins, and route the XIN/XOUT traces symmetrically to minimize duty-cycle distortion.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not aggregated on a single manufacturer or distributor page.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21E16A-AUT — 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 ATSAMC21E16A-AUT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature Range, CAN-FD Controller, Operating Temperature.
ATSAMC21E17A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC20E16A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21E18A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21E15A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC20G16A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21E16A-AUT Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 64 KB |
| SRAM | 8 KB |
| Auxiliary Flash (EEPROM emulation) | 2 KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| I/O Tolerance | 5 V tolerant |
| Number of I/O Pins | 26 |
| Hộp | 32-pin TQFP (7x7 mm) |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| ADC | 12-bit, up to 10 channels |
| Communication Peripherals | CAN-FD, USB 2.0 FS, 6x SERCOM (UART/SPI/I2C) |
| Timers | 16-bit TCC, TC, and RTC |
| Hardware Multiplier | Single-cycle (32-bit result) |
| Memory Protection Unit (MPU) | Yes |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant (per Microchip product page) |
Cấu hình chân ATSAMC21E16A-AUT
| Chân 1 | PA03 — GPIO / ADC AIN1 |
| Chân 2 | PA04 — GPIO / ADC AIN2 / VREFB |
| Chân 3 | PA05 — GPIO / ADC AIN3 |
| Chân 4 | PA06 — GPIO / ADC AIN4 |
| Chân 5 | PA07 — GPIO / ADC AIN5 |
| Chân 6 | PA08 — GPIO / SERCOM0 PAD0 / I2S |
| Chân 7 | PA09 — GPIO / SERCOM0 PAD1 / I2S |
| Chân 8 | PA10 — GPIO / SERCOM0 PAD2 |
| Chân 9 | PA11 — GPIO / SERCOM0 PAD3 |
| Chân 10 | VDD — Digital supply voltage (2.7V to 5.5V) |
| Chân 11 | GND — Ground |
| Chân 12 | PA14 — GPIO / XIN |
| Chân 13 | PA15 — GPIO / XOUT |
| Chân 14 | PA16 — GPIO / SERCOM1 PAD0 / I2S |
| Chân 15 | PA17 — GPIO / SERCOM1 PAD1 / I2S |
| Chân 16 | PA18 — GPIO / SERCOM1 PAD2 |
| Chân 17 | PA19 — GPIO / SERCOM1 PAD3 |
| Chân 18 | PA20 — GPIO / SERCOM3 PAD0 |
| Chân 19 | PA21 — GPIO / SERCOM3 PAD1 |
| Chân 20 | PA22 — GPIO / SERCOM3 PAD2 |
| Chân 21 | PA23 — GPIO / SERCOM3 PAD3 / USB SOF |
| Chân 22 | PA24 — GPIO / USB D- |
| Chân 23 | PA25 — GPIO / USB D+ |
| Chân 24 | PA27 — GPIO |
| Chân 25 | PA28 — GPIO / CAN TX |
| Chân 26 | PA29 — GPIO / CAN RX / BOOT |
| Chân 27 | VDDIO — I/O supply voltage (tied to VDD in single-supply mode) |
| Chân 28 | GND — Ground |
| Chân 29 | PA30 — GPIO / SWCLK |
| Chân 30 | PA31 — GPIO / SWDIO |
| Chân 31 | NRST — Active-low reset input |
| Chân 32 | VDDCORE — Internal core voltage regulator output (decoupling only) |
Ứng dụng tiêu biểu
ATSAMC21E16A-AUT phù hợp cho 6 Áp dụngs: CAN-FD Industrial Sensor Node, Building Automation Controller, USB Human Interface Device (HID), Small BLDC Motor Controller, Battery-Backed Metering / Smart Sensor, Low-End Automotive Body / HVAC Module.
CAN-FD Industrial Sensor Node
The ATSAMC21E16A-AUT's integrated CAN-FD controller and 5V-tolerant I/O make it a strong fit for industrial sensor nodes communicating over ISO 11898-1:2015 networks. With 64 KB Flash it accommodates the Bosch CAN-FD stack plus application code, and the 48 MHz Cortex-M0+ delivers deterministic 1 ms control loops typical of process-control loops. The 8 KB SRAM holds CAN message buffers and a small RTOS, while the 12-bit ADC reads analog sensors without an external front-end. Unlike lower-voltage SAM D21 parts, it interfaces directly with 5V industrial sensors and 24V level-shifted signals common in factory automation, reducing BOM cost. Designers typically pair it with a TLE7250-3 CAN transceiver for a complete node.
Được đề xuất
Building Automation Controller
Building automation controllers need to drive relays, triacs, and 0-10V analog outputs while communicating on RS-485 or CAN backbones. The ATSAMC21E16A-AUT's 5V I/O tolerance interfaces directly with legacy building-automation peripherals, and its 6 SERCOM modules can be independently configured as UART, SPI, or I2C to handle multiple building-protocol transceivers. The 48 MHz core executes BACnet or Modbus stacks with margin, and the 64 KB Flash holds the application plus a small bootloader for OTA updates. The 32-pin TQFP is a compact footprint that fits standard DIN-rail module PCBs, and the -40 C to +85 C industrial temperature range handles unheated electrical closets.
Được đề xuất
USB Human Interface Device (HID)
The ATSAMC21E16A-AUT's integrated USB 2.0 full-speed device controller with on-chip pull-up and internal 3.3V regulator enables compact USB HID designs without an external PHY. With 64 KB Flash it fits full HID report descriptors, vendor-specific feature reports, and a small USB stack such as the Microchip USB Framework. The 32-pin TQFP keeps the PCB compact for cable-mounted peripherals, and the 5V-tolerant I/O is convenient for driving status LEDs directly from VBUS through a current-limiting resistor. The 8 KB SRAM is sufficient for HID ring buffers and small vendor command processing, while the 48 MHz Cortex-M0+ handles polling at the USB 1 ms frame interval.
Được đề xuất
Small BLDC Motor Controller
The ATSAMC21E16A-AUT drives small brushless DC motors in appliances, fans, and pumps where its 48 MHz Cortex-M0+ runs field-oriented control (FOC) loops at the required 10 kHz PWM rate. The 5V I/O tolerance interfaces directly with 5V gate drivers, eliminating level shifters, and the TCC timer can generate complementary 3-phase PWM with dead-band insertion. The 12-bit ADC samples phase currents and back-EMF synchronously to the PWM center, while the 8 KB SRAM holds FOC state variables and a small lookup table. The 32-pin TQFP fits low-profile motor-control PCBs and supports the industrial -40 C to +85 C operating range required by white goods.
Được đề xuất
Battery-Backed Metering / Smart Sensor
The ATSAMC21E16A-AUT's low-power Backup mode at approximately 3 microamps with RTC running and full SRAM retention supports battery-backed metering and smart-sensor applications. The 32.768 kHz crystal input drives the RTC, and the Cortex-M0+ wakes to active mode on RTC alarm to take ADC readings, log them to the 2 KB EEPROM-emulation Flash, and return to sleep. With 64 KB Flash it accommodates segmented metering firmware plus a small bootloader, while the 8 KB SRAM holds intermediate samples and a small ring buffer. CAN-FD or UART can be used for last-mile communication back to a gateway.
Được đề xuất
Low-End Automotive Body / HVAC Module
Automotive body controllers, HVAC flap drivers, and seat-control modules typically operate from a 12V bus stepped down to 5V and need CAN communication plus a moderate amount of GPIO. The ATSAMC21E16A-AUT's integrated CAN-FD controller, 5V I/O, and -40 C to +85 C industrial temperature make it a fit for cabin-mounted modules where the underhood AEC-Q100 Grade 0 requirement does not apply. The 48 MHz Cortex-M0+ runs the CAN-FD stack and a small control loop simultaneously, while the 64 KB Flash holds the application plus a CAN bootloader for service reflashing. The 32-pin TQFP is compact enough for distributed body modules mounted behind trim panels.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21E16A-AUT — 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 | ATSAMC21E17A-AUT | ATSAMC20E16A-AUT | ATSAMC21E18A-AUT | ATSAMC21E15A-AUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same |
| Core | ARM Cortex-M0+ (48 MHz) | ARM Cortex-M0+ (48 MHz) | ARM Cortex-M0+ (48 MHz) | ARM Cortex-M0+ (48 MHz) | ARM Cortex-M0+ (48 MHz) |
| Flash | 64 KB | 72 KB (+12.5%) | 64 KB (same) | 256 KB (+300%) | 32 KB (-50%) |
| SRAM | 8 KB | 8 KB (same) | 8 KB (same) | 8 KB (same) | 4 KB (-50%) |
| CAN-FD | Yes | Yes | No (CAN 2.0B only) | Yes | Yes |
| USB 2.0 FS | Yes | Yes | Yes | Yes | Yes |
| I/O Count | 26 | 26 (same) | 26 (same) | 26 (same) | 26 (same) |
| Supply Voltage | 2.7V to 5.5V (5V tolerant I/O) | 2.7V to 5.5V (5V tolerant I/O) | 2.7V to 5.5V (5V tolerant I/O) | 2.7V to 5.5V (5V tolerant I/O) | 2.7V to 5.5V (5V tolerant I/O) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Bảo phân biệt quan trọng
- Integrated CAN-FD controller with 5V I/O tolerance in 32-pin TQFP (vsATSAMD21E16B-AUT)
- 64 KB Flash dual-bank with EEPROM emulation (vsATSAMC21E15A-AUT)
- Mature MPLAB Harmony v3 and ASF4 software support (vsGeneric Cortex-M0+ MCUs)
Ghi chú thiết kế
Estimated: The ATSAMC21E16A-AUT draws approximately 7 mA in active mode at 48 MHz with all peripherals enabled. Place a 100 nF X7R decoupling capacitor within 3 mm of each VDD pin and a bulk 4.7 uF tantalum or ceramic capacitor at the board supply entry. The internal core regulator on VDDCORE requires its own 1 uF ceramic capacitor placed within 2 mm of the pin. Avoid daisy-chaining VDD/VSS - use a star or power-plane topology to minimize digital switching noise coupling into the analog ADC inputs.
The 32-pin TQFP uses 0.8 mm pitch - a fine-pitch but hand-solderable package with proper technique. Use a 4-layer PCB with continuous ground plane under the MCU for best EMI and thermal performance. Keep the XIN/XOUT traces short and symmetric to minimize duty-cycle distortion on the high-frequency crystal; route them on the top layer with a guard ground on the layer below. Place the 32.768 kHz watch crystal within 5 mm of the XIN32/XOUT32 pins (PA00/PA01 in this package variant) with load capacitors sized per the crystal datasheet.
The NRST pin is active-low and is internally pulled-up; in noisy industrial environments add an external 10 kohm pull-up and 100 nF capacitor to ensure clean reset. Do not leave unused GPIO pins floating - configure them as outputs with low level or enable the internal pull. When using the USB peripheral, the internal 3.3V USB regulator requires a 1 uF decoupling capacitor on VBUS, and the D+/D- lines need 22 to 44 ohm series resistors close to the MCU pins to meet USB impedance requirements.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature range; not AEC-Q100 qualified - select automotive-grade SAM C21 variants for underhood AEC-Q100 applications.
