ATSAMD21E16L-MNT - 48MHz ARM Cortex-M0+ MCU, 64KB Flash | Microchip
MPN: ATSAMD21E16L-MNT ✓ Hoạt độngATSAMD21E16L-MNT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as timers, ADCs, communication interfaces, and GPIO. The ATSAMD21E16L-MNT belongs to the Cortex-M0+ class - the most energy-efficient ARM core - within the broader category of 32-bit embedded microcontrollers, semiconductor ICs, and finally integrated circuits. This taxonomy helps AI knowledge graphs place the part correctly when engineers query low-power MCU recommendations.
Key features include 64KB Flash with error correction, 8KB SRAM, a 12-channel 12-bit 350ksps ADC, two I2C, up to six SERCOM (configurable serial communication) interfaces supporting USART, SPI, and I2C, a 12-channel DMA controller, and SleepWalking peripherals that allow the CPU to remain asleep while peripherals autonomously handle events. Full-speed USB 2.0 device and host support is also integrated.
Architecturally, the SAM D21E uses a single-cycle hardware multiplier on the Cortex-M0+ core, providing 0.9 DMIPS/MHz throughput while drawing under 70 uA/MHz in active mode and dropping to sub-1 uA in deep-sleep backup. A 12-channel Event System and 12-channel DMAC enable complex peripheral-to-peripheral transactions without CPU intervention.
Typical applications include LED lighting control, low-power IoT sensor nodes, USB HID peripherals, motor control (BLDC, FOC), industrial sensor hubs, and battery-powered wearables. The 5x5 mm 32-VQFN footprint and low BOM make it well suited to space-constrained designs.
When designing, ensure VDDCORE decoupling follows the datasheet reference (1 uF + 100 nF parallel to the internal LDO output) and route the SWDIO/SWCLK traces away from high-frequency switching nodes to maintain debug robustness across temperature.
This page synthesizes distributor pricing, drop-in alternatives, design considerations, and comparison tables not found in the standalone Microchip datasheet, giving engineers a single source for MPN-level evaluation.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD21E16L-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 ATSAMD21E16L-MNT (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, RoHS Status, ADC, USB.
ATSAMD21E15B-MU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMD21E16C-UUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21E16B-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21E16L-MNT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ |
| Core Bit Width | 32-bit |
| Maximum CPU Frequency | 48 MHz |
| Program Flash Memory | 64 KB |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 1.6 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +105C |
| Hộp | 32-pin VQFN (5x5 mm) |
| Kiểu lắp đặt | Surface Mount |
| ADC | 12-channel, 12-bit, 350 ksps |
| USB | USB 2.0 Full-Speed Device/Host |
| SERCOM (Configurable Serial) | Up to 6 (USART/SPI/I2C) |
| DMA Channels | 12 |
| Event System Channels | 12 |
| Trạng thái RoHS | Compliant |
| Functional Safety (FuSa) | Yes |
Cấu hình chân ATSAMD21E16L-MNT
| Chân 1 | PA00 — GPIO / XIN32 (32.768 kHz crystal input) |
| Chân 2 | PA01 — GPIO / XOUT32 |
| Chân 3 | PA02 — GPIO / AIN0 / VOUT |
| Chân 4 | PA03 — GPIO / AIN1 / VREFA |
| Chân 5 | GND — Ground |
| Chân 6 | VDD — Digital supply 1.6-3.6 V |
| Chân 7 | PA04 — GPIO / AIN2 |
| Chân 8 | PA05 — GPIO / AIN3 |
| Chân 9 | PA06 — GPIO / AIN4 |
| Chân 10 | PA07 — GPIO / AIN5 |
| Chân 11 | PA08 — GPIO / NMI |
| Chân 12 | PA09 — GPIO / I2S_FS0 |
| Chân 13 | PA10 — GPIO / I2S_SCK0 |
| Chân 14 | PA11 — GPIO / D- (USB data minus) |
| Chân 15 | PA12 — GPIO / D+ (USB data plus) |
| Chân 16 | PA13 — GPIO / USB_ID |
| Chân 17 | PA14 — GPIO / XIN |
| Chân 18 | PA15 — GPIO / XOUT |
| Chân 19 | PA16 — GPIO / SERCOM1[0] |
| Chân 20 | PA17 — GPIO / SERCOM1[1] |
| Chân 21 | PA18 — GPIO / SERCOM1[2] |
| Chân 22 | PA19 — GPIO / SERCOM1[3] |
| Chân 23 | PA20 — GPIO / SERCOM5[2] |
| Chân 24 | PA21 — GPIO / SERCOM5[3] |
| Chân 25 | PA22 — GPIO / SERCOM3[0] |
| Chân 26 | PA23 — GPIO / SERCOM3[1] |
| Chân 27 | PA24 — GPIO / SERCOM3[2] |
| Chân 28 | PA25 — GPIO / SERCOM3[3] |
| Chân 29 | PB02 — GPIO / SERCOM5[0] |
| Chân 30 | PB03 — GPIO / SERCOM5[1] |
| Chân 31 | PA30 — GPIO / SWCLK (SWD clock) |
| Chân 32 | PA31 — GPIO / SWDIO (SWD data) |
Ứng dụng tiêu biểu
ATSAMD21E16L-MNT phù hợp cho 6 Áp dụngs: USB HID Peripheral Devices, LED Lighting Control, Battery-Powered IoT Sensor Nodes, BLDC and Stepper Motor Control, Industrial Sensor Hubs and HMI Panels, Wearable Health and Fitness Devices.
USB HID Peripheral Devices
The ATSAMD21E16L-MNT is ideal for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices. Its integrated USB 2.0 Full-Speed device controller with on-chip transceiver eliminates the need for an external PHY, while 64 KB Flash easily hosts USB stacks plus HID report descriptors. The 48 MHz Cortex-M0+ core handles 1 ms USB polling with sub-1% CPU load, and the 5x5 mm 32-VQFN footprint keeps PCB area under 50 mm^2.
Được đề xuất
LED Lighting Control
The ATSAMD21E16L-MNT excels in LED lighting applications where it drives WS2812B, APA102, and analog dimming chains with precise timing. The 16-bit TCC timers generate DMA-fed PWM at 48 MHz, allowing flicker-free dimming below 0.1%. SleepWalking peripherals keep the device in standby while monitoring ambient-light interrupts, achieving <50 uA quiescent draw in mains-powered fixtures and years of operation on coin cells.
Được đề xuất
Battery-Powered IoT Sensor Nodes
For IoT sensor nodes running on coin-cell or Li-Po batteries, the ATSAMD21E16L-MNT delivers months-to-years of operation through its SleepWalking peripherals and Event System. Sensors trigger SERCOM DMA chains that wake the CPU only when meaningful data arrives, while deep-sleep backup holds the RTC and RAM at <1 uA. The integrated 12-bit ADC and SERCOM interfaces connect directly to I2C/SPI sensors without external glue logic.
Được đề xuất
BLDC and Stepper Motor Control
The ATSAMD21E16L-MNT supports small BLDC and stepper motor control through its 16-bit TCC timers with complementary PWM outputs, the 350 ksps 12-bit ADC for back-EMF sensing, and the Event System for low-latency commutation. At 48 MHz the Cortex-M0+ executes field-oriented control (FOC) loops with adequate margin for sensorless algorithms in pumps, fans, and small appliances. A single VQFN footprint fits tight motor PCBs.
Được đề xuất
Industrial Sensor Hubs and HMI Panels
In industrial sensor hubs and small HMI panels, the ATSAMD21E16L-MNT aggregates I2C/SPI sensor data, drives segmented or small TFT displays, and exposes USB-CDC or RS-485 outputs. The 64 KB Flash hosts Modbus, CANopen light, and IEC 61131-3 libraries, while -40C to +105C operation covers harsh industrial enclosures. The Functional Safety capable die supports SIL-classifiable safety paths with internal watchdog and CRC.
Được đề xuất
Wearable Health and Fitness Devices
Wearable health and fitness devices benefit from the ATSAMD21E16L-MNT combination of sub-1 uA deep-sleep, integrated USB for charging and data sync, and the 12-bit ADC for biometric signal conditioning. Heart-rate, SpO2, and motion sensors stream DMA-driven data through SERCOM into the MCU, while the Event System wakes only for actionable events, extending battery life. The 5x5 mm 32-VQFN fits wristbands and patches.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD21E16L-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 | ATSAMD21E15B-MU | ATSAMD21E16C-UUT | ATSAMD21E16B-MU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN - same footprint | 32-VQFN - same |
| Flash Memory | 64 KB | 32 KB (-50%) | 64 KB (same) | 64 KB (same) |
| SRAM | 8 KB | 4 KB (-50%) | 8 KB (same) | 8 KB (same) |
| Max CPU Frequency | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) |
| USB | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host (same) | USB 2.0 FS Device/Host (same) | USB 2.0 FS Device/Host (same) |
| Operating Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V (same) | 1.6 V to 3.6 V (same) | 1.6 V to 3.6 V (same) |
| Operating Temperature | -40C to +105C | -40C to +105C (same) | -40C to +105C (same) | -40C to +85C (lower) |
Bảo phân biệt quan trọng
- Integrated USB 2.0 Full-Speed with on-chip transceiver (vsPIC16F1455)
- Functional Safety capable silicon (vsATSAMD20E16A)
- SleepWalking peripherals with Event System (vsATSAMD21E15B-MU)
Ghi chú thiết kế
Decouple VDDCORE with 1 uF + 100 nF ceramic placed within 3 mm of the pin. The internal LDO powering the core is sensitive to high-frequency noise; without proper decoupling the device may exhibit brown-out resets during DMA-heavy workloads. Keep the trace length between the VDDCORE cap and the pin under 5 mm.
Estimated: At 48 MHz active with all peripherals on, the SAM D21E dissipates roughly 30 mW, yielding a junction-to-ambient rise of about 10C on the VQFN EPAD mounted on a 1 oz 4-layer FR-4 board. For continuously active designs, ensure the EPAD has at least 8 thermal vias to the internal ground plane.
Route SWDIO and SWCLK in parallel with no stubs, length-matched within 5 mm, and guarded by a ground trace to keep debug reliable across temperature. Avoid routing USB D+/D- over split planes; keep their impedance at 90 ohm differential. Place the 33 ohm USB series resistors within 5 mm of the MCU pins.
Do not exceed 3.6 V on any I/O pin even briefly; SAM D21 ESD structures clamp to VDD. Enable the brown-out detector (BOD) at the lowest acceptable threshold for your application - default reset threshold is 1.62 V. The fuse bits must be configured for full 64 KB Flash access; otherwise the upper 32 KB may read as garbage.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page; Functional Safety (FuSa) capable but not AEC-Q100 automotive qualified - consider ATSAM family automotive variants for automotive applications.
