ATSAMD20E15A-AU - ARM Cortex-M0+ 48MHz 32KB Flash MCU | Microchip
MPN: ATSAMD20E15A-AU ✓ Hoạt độngATSAMD20E15A-AU Tóm tắt
What is a Cortex-M0+ microcontroller? The ARM Cortex-M0+ is the smallest and most energy-efficient Cortex-M core; it executes the Thumb/Thumb-2 instruction set, provides single-cycle IO, a 32-bit hardware multiplier, and a Nested Vectored Interrupt Controller (NVIC). Microcontrollers (MCUs) integrate CPU core, non-volatile memory (Flash), volatile memory (SRAM), and peripherals on a single die, forming the smallest complete compute node in an embedded system hierarchy that ascends: Cortex-M0+ -> ARM Cortex-M family -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor.
Key features of the ATSAMD20E15A-AU include: 48 MHz Cortex-M0+ core, 32 KB Flash / 4 KB SRAM, 12-bit 200 ksps ADC with up to 10 analog channels, 10-bit DAC, six SERCOM ports (configurable as UART/SPI/I2C), 256-channel PTC for touch interfaces, Sleepwalking peripherals, and an integrated RTC. The device supports 1.62 V to 3.63 V supply operation and offers multiple low-power modes including IDLE, STANDBY, BACKUP, and OFF, with typical active current around 3.6 mA at 48 MHz.
The architecture pairs a deterministic Cortex-M0+ pipeline with Microchip's Event System for inter-peripheral signaling without CPU intervention, plus a 6-channel DMA controller and SleepWalking logic that lets peripherals operate autonomously while the core remains in standby. The 12-bit ADC delivers up to 200 ksps with oversampling and hardware averaging.
Typical applications include home automation endpoints, consumer electronics, smart metering, industrial sensor nodes, capacitive-touch human-machine interfaces, low-power wireless sensor hubs, and battery-powered IoT devices. The wide operating voltage and rich peripheral mix let a single MCU serve as the system controller.
When designing with this device, place decoupling capacitors (100 nF and bulk) close to the VDD pin, and respect the trace-length guidelines for VDDCORE/VDDIO when tying the internal LDO to the core rail; use Atmel/Microchip Studio or MPLAB X IDE for code development.
This page synthesizes distributor stock data, drop-in alternatives, and practical design notes not consolidated on the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD20E15A-AU — 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 ATSAMD20E15A-AU (cùng hình factor và footprint) — khác nhau ở ADC, SRAM, Program Memory (Flash), Package, RoHS Status.
ATSAMD20E15A-AUT
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| Core | ARM Cortex-M0+ |
| Core Architecture | ARM 32-bit |
| Tần số xung maksimum | 48 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Hộp | 32-pin TQFP (7x7 mm) |
| Kiểu lắp đặt | Surface Mount |
| Supply Voltage (VDD) | 1.62 V to 3.63 V |
| ADC | 12-bit, up to 200 ksps |
| DAC | 10-bit |
| Peripheral Touch Controller (PTC) | 256-channel |
| SERCOM Ports | 6 (configurable UART/SPI/I2C) |
| DMA Channels | 6 |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân ATSAMD20E15A-AU
| Chân 1 | PA00 — GPIO / SERCOM1[0] / PTC_X0 |
| Chân 2 | PA01 — GPIO / SERCOM1[1] / PTC_X1 |
| Chân 3 | PA02 — GPIO / AIN0 / VREFA |
| Chân 4 | PA03 — GPIO / AIN1 / VREFB |
| Chân 5 | GND — Ground |
| Chân 6 | VDD — Digital supply voltage |
| Chân 7 | PA04 — GPIO / SERCOM0[0] / AIN4 |
| Chân 8 | PA05 — GPIO / SERCOM0[1] / AIN5 |
| Chân 9 | PA06 — GPIO / SERCOM0[2] / AIN6 |
| Chân 10 | PA07 — GPIO / SERCOM0[3] / AIN7 |
| Chân 11 | PA08 — GPIO / SERCOM2[0] / NMI |
| Chân 12 | PA09 — GPIO / SERCOM2[1] |
| Chân 13 | PA10 — GPIO / SERCOM2[2] |
| Chân 14 | PA11 — GPIO / SERCOM2[3] |
| Chân 15 | PA12 — GPIO / SERCOM4[0] |
| Chân 16 | PA13 — GPIO / SERCOM4[1] |
| Chân 17 | PA14 — GPIO / SERCOM4[2] |
| Chân 18 | PA15 — GPIO / SERCOM4[3] |
| Chân 19 | GND — Ground |
| Chân 20 | VDD — Digital supply voltage |
| Chân 21 | PA16 — GPIO / SERCOM3[0] |
| Chân 22 | PA17 — GPIO / SERCOM3[1] |
| Chân 23 | PA18 — GPIO / SERCOM3[2] |
| Chân 24 | PA19 — GPIO / SERCOM3[3] |
| Chân 25 | PA20 — GPIO / SERCOM5[0] |
| Chân 26 | PA21 — GPIO / SERCOM5[1] |
| Chân 27 | PA22 — GPIO / SERCOM5[2] |
| Chân 28 | PA23 — GPIO / SERCOM5[3] |
| Chân 29 | PA24 — GPIO / USB_DM (alternate) |
| Chân 30 | PA25 — GPIO / USB_DP (alternate) |
| Chân 31 | RESET — Reset (active low) |
| Chân 32 | PA30 / SWDIO — SWD data |
Ứng dụng tiêu biểu
ATSAMD20E15A-AU phù hợp cho 7 Áp dụngs: Home Automation Endpoints, Industrial Sensor Nodes, Smart Metering / Utility Nodes, Capacitive Touch HMIs, Consumer Wearables / Fitness Bands, Battery-Powered IoT Sensor Hubs, LED Lighting Controllers.
Home Automation Endpoints
The ATSAMD20E15A-AU fits home automation endpoint hubs with its 48 MHz Cortex-M0+ core, 32 KB Flash, and six SERCOM ports that can simultaneously drive I2C sensors, SPI flash, UART for Wi-Fi/BLE modules, and capacitive touch buttons. The 12-bit ADC at 200 ksps is sufficient for thermistor-based temperature monitoring, while SleepWalking peripherals reduce idle current to single-digit microamps, ideal for always-on wall switches or battery-powered occupancy sensors. At 1.62 V to 3.63 V operation, the part can run directly from a CR2032 cell or a 3.3 V LDO fed by mains. Use the 256-channel PTC for touch keys, and pair the device with an ATECC608B secure element via SERCOM for Zigbee/Matter commissioning.
Được đề xuất
Industrial Sensor Nodes
The ATSAMD20E15A-AU suits industrial 4-20 mA sensor interfaces and 4-wire RTD bridge digitizers with its 12-bit ADC at 200 ksps and 10-bit DAC for loop calibration. The Event System lets an ADC end-of-conversion trigger a DMA channel that updates SERCOM UART output without waking the CPU, reducing deterministic latency to under 5 us. The 32-TQFP package supports -40C to +85C industrial temperatures, making the device appropriate for factory floor motor control boards and PLC analog input modules. SERCOM ports can be reconfigured on-the-fly as UART/SPI/I2C to drive isolated gate drivers, and the integrated RTC timestamps data buffers. Use the WDT for fail-safe reset in field-deployed boxes.
Được đề xuất
Smart Metering / Utility Nodes
The ATSAMD20E15A-AU integrates a Cortex-M0+ at 48 MHz with hardware RTC and SleepWalking peripherals - ideal for water/gas metering endpoints that must sleep for >99% of duty cycle while still capturing flow pulses. The 32 KB Flash stores metering logs and tamper events; 4 KB SRAM buffers burst-flow data before DMA flushes it to serial flash. The 12-bit ADC can read optical or magnetic pickup outputs with 0.5 LSB accuracy after oversampling. The 256-channel PTC supports optional capacitive button interfaces on the meter cover. At 1.62 V to 3.63 V operation the part can run from a single lithium-thionyl chloride cell for 10+ year battery life when paired with SleepWalking.
Được đề xuất
Capacitive Touch HMIs
The ATSAMD20E15A-AU's 256-channel Peripheral Touch Controller (PTC) supports up to 256 mutual-capacitance electrodes without an external touch IC, making it a single-chip solution for keypad/HMI front panels in appliances, white goods, and industrial controllers. The PTC supports both self-capacitance (channel-by-channel scan for buttons) and mutual-capacitance (matrix scan for sliders/wheels), driven autonomously by hardware so the CPU can stay in IDLE while scans complete. The integrated 12-bit ADC can read slider position to 0.5% accuracy, and SERCOM UART transmits events to a host display MCU. The 32-TQFP package supports industrial-temperature designs.
Được đề xuất
Consumer Wearables / Fitness Bands
The ATSAMD20E15A-AU fits battery-powered wearable hub designs with its 48 MHz Cortex-M0+ compute, 12-bit ADC for PPG/heart-rate analog front ends, and 32 KB Flash for bootloader plus BLE service logic. SleepWalking RTC wakes the device at 1 Hz for step-counter sampling while keeping total quiescent current under 5 uA in BACKUP mode. The 10-bit DAC drives a buzzer or vibration motor PWM via DMA. SERCOM ports support an I2C PPG sensor, a SPI BLE radio, and a UART debug path. The 32-TQFP package keeps total BOM small for $20 fitness-band designs and supports direct USB battery-pack charging through an external charger IC.
Được đề xuất
Battery-Powered IoT Sensor Hubs
The ATSAMD20E15A-AU works as a battery-powered IoT endpoint hub with LoRa/Sigfox/IEEE 802.15.4 co-processors over SPI. The integrated Event System lets an external interrupt from a co-processor wake the core to process incoming frames; meanwhile the SleepWalking ADC samples a soil/environment sensor at 1 Hz while consuming under 30 uA total. The 32 KB Flash holds an MQTT-SN or CoAP client with TLS over LoRaWAN, and 4 KB SRAM supports small TLS session buffers with PSK. The 1.62 V to 3.63 V VDD range matches a primary Li-SOCl2 cell or 2x AA alkaline batteries for 5+ year remote deployments. Wake-on-RTC and watchdog timers handle unattended field maintenance cycles.
Được đề xuất
LED Lighting Controllers
The ATSAMD20E15A-AU drives DMX512-controlled or DALI-controlled LED lighting fixtures with its 48 MHz Cortex-M0+ handling protocol stacks in 32 KB Flash and DMA-backed PWM generation across multiple SERCOM ports. The 12-bit ADC reads ambient light sensor feedback for closed-loop brightness control, while the 10-bit DAC produces smooth dimming curves. SleepWalking serial peripherals wake the MCU only when a DMX frame is detected, allowing always-on energy-aware fixtures that comply with EU standby regulations. The 32-TQFP package supports -40C to +85C fixture-enclosure thermal conditions, and the 6 SERCOM ports simultaneously drive LED driver ICs over SPI and accept DMX via UART.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD20E15A-AU — 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 | ATSAMD20E15A-AUT | ATSAMD20E15B-AU | ATSAMD20E15B-AUT | ATSAMD20E14B-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) |
| Silicon Revision | A | A | B | B | B (lower-memory) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| RoHS / Lead-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Bảo phân biệt quan trọng
- Cortex-M0+ with 6 SERCOM ports for protocol flexibility (vsATSAMD20E15B-AU)
- 256-channel Peripheral Touch Controller integrated (vsATSAMD20E14B-AU)
- Industrial temperature range from -40C to +85C (vsATSAMD20E15A-AUT)
Ghi chú thiết kế
The ATSAMD20E15A-AU requires decoupling directly on VDD (pin 6 and pin 20) and on VDDCORE (pin tied internally to LDO). Use a 100 nF X7R ceramic + 4.7 uF bulk in parallel placed within 3 mm of each VDD pin. For the internal voltage regulator, add a 1 uF X7R on VDDCORE and route it to a wide power trace. Estimated: with VDD = 3.3 V and 48 MHz operation, the part draws about 3.6 mA active; in BACKUP mode (RTC running, RAM retained) it draws about 4 uA per the SAM D20 datasheet (Atmel-42129) power-management chapter.
Route SWDIO (PA30) and SWDCLK (PA31) on the package edge directly to a 2x5 0.05" debug-header footprint so an Atmel-ICE or SAME-ICE debugger can attach in-circuit. Keep SWD traces under 50 mm, pair them with GND, and avoid running them parallel to switching nodes. A 100 nF cap on RESET (pin 31) prevents brownout mis-triggers during hot-insertion events. The 32-TQFP (7x7 mm) exposed pad is the central thermal pad - tie it to GND with multiple thermal vias for adequate heat spreading.
Do not exceed VDD of 3.63 V absolute maximum; the part can be permanently damaged above 3.8 V. The 32 KB Flash is single-bank and in-application programmable - if the application requires field firmware update with rollback, allocate a separate bootloader region at the top of Flash (typically last 4 KB). When migrating from the A-revision to B-revision ATSAMD20E15B-AU, verify that your code does not rely on errata items documented in the SAM D20 silicon errata sheet, since some ADC and SERCOM glitches were fixed in B-revision parts.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade part; automotive designs should select AEC-Q100 qualified SAM D20 variants where available.
