ATSAMD20E15A-AN - 32KB Flash ARM Cortex-M0+ MCU | Microchip
MPN： ATSAMD20E15A-AN ✓ 啟用中ATSAMD20E15A-AN 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The ARM Cortex-M0+ is the smallest and most energy-efficient member of the ARM Cortex-M processor family, designed for embedded applications where deterministic real-time response and ultra-low power consumption are required. The SAM D20 sits in the hierarchy as: Cortex-M0+ core -> ARM Cortex-M family -> 32-bit RISC microcontroller -> embedded processor -> semiconductor IC, making it ideal for cost-sensitive yet feature-rich IoT and consumer designs.
Key differentiating features include the SERCOM (Serial Communication Interface) modules that can be independently configured as UART, SPI, or I2C, plus a hardware Peripheral Touch Controller for capacitive touch buttons and sliders without external components. The 12-bit ADC delivers up to 350ksps with internal voltage reference, while the 10-bit DAC supports waveform generation. Multiple Sleep modes (Idle, Standby, Backup) and a dedicated RTC with calendar mode achieve sleep currents below 5 microamps.
Typical applications span home automation endpoints (smart thermostats, sensor hubs), consumer electronics (wearable accessories, toys), metering (energy and water monitors), and industrial controls (HMI panels, low-end PLCs). The wide 1.62V to 3.63V operating range and AEC-Q100 qualified variants simplify designs that target both battery-powered and 24V industrial bus environments.
When designing with the ATSAMD20E15A-AN, ensure the on-chip voltage regulator's bulk capacitor meets Microchip's reference design (typically 1uF X7R). Decoupling capacitors should be placed within 2mm of each supply pin, and unused SERCOM pads can be repurposed as GPIO. Programming is supported via Atmel-ICE or Curiosity Nano boards through the SWD interface.
直接替換替代品，適用於 ATSAMD20E15A-AN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMD20E15A-AN （相同外形與佔位） — 差異在於 ADC, Package, Operating Temperature, MSL Level, SERCOM Modules.
ATSAMD20E14A-AN
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20E14B-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20E14B-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20E14B-MUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD10D14A-SSNT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD11D14A-MNT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20E15A-AN 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| 最大時脈頻率 | 48 MHz |
| Flash Memory | 32 KB |
| SRAM | 4 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| 工作溫度 | -40 C to +105 C |
| CoreMark Performance | 2.14 CoreMark/MHz |
| ADC Resolution | 12-bit |
| DAC Resolution | 10-bit |
| Peripheral Touch Controller | 256 channels |
| SERCOM Modules | 6 (configurable UART/SPI/I2C) |
| 封裝 | 32-pin TQFP |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Lead Free | Yes |
ATSAMD20E15A-AN 腳位配置
| 腳位 1 | PA00 — GPIO/SERCOM1[0]/ADC[0] |
| 腳位 2 | PA01 — GPIO/SERCOM1[1]/ADC[1] |
| 腳位 3 | PA02 — GPIO/SERCOM0[0]/ADC[2] |
| 腳位 4 | VDD — Digital supply voltage |
| 腳位 5 | GND — Ground |
| 腳位 6 | PA03 — GPIO/SERCOM0[1]/ADC[3]/VREFA |
| 腳位 7 | PA04 — GPIO/SERCOM0[2]/ADC[4] |
| 腳位 8 | PA05 — GPIO/SERCOM0[3]/ADC[5] |
| 腳位 9 | PA06 — GPIO/SERCOM2[0]/ADC[6] |
| 腳位 10 | PA07 — GPIO/SERCOM2[1]/ADC[7] |
| 腳位 11 | PA08 — GPIO/SERCOM2[2]/ADC[8]/NMI |
| 腳位 12 | PA09 — GPIO/SERCOM2[3]/ADC[9] |
| 腳位 13 | PA10 — GPIO/SERCOM0[2]/ADC[10] |
| 腳位 14 | PA11 — GPIO/SERCOM0[3]/ADC[11] |
| 腳位 15 | PA14 — GPIO/SERCOM2[2]/XIN |
| 腳位 16 | PA15 — GPIO/SERCOM2[3]/XOUT |
| 腳位 17 | PA16 — GPIO/SERCOM1[0]/PTC[X0] |
| 腳位 18 | PA17 — GPIO/SERCOM1[1]/PTC[X1] |
| 腳位 19 | PA18 — GPIO/SERCOM1[2]/PTC[X2] |
| 腳位 20 | PA19 — GPIO/SERCOM1[3]/PTC[X3] |
| 腳位 21 | PA20 — GPIO/SERCOM5[2]/PTC[X4] |
| 腳位 22 | PA21 — GPIO/SERCOM5[3]/PTC[X5] |
| 腳位 23 | PA22 — GPIO/SERCOM3[0]/PTC[X6] |
| 腳位 24 | PA23 — GPIO/SERCOM3[1]/PTC[X7] |
| 腳位 25 | PA24 — GPIO/SERCOM3[2]/PTC[Y0] |
| 腳位 26 | PA25 — GPIO/SERCOM3[3]/PTC[Y1] |
| 腳位 27 | PA27 — GPIO/SERCOM5[3]/PTC[Y2] |
| 腳位 28 | PA28 — GPIO/SERCOM5[2]/PTC[Y3]/RESET |
| 腳位 29 | VDD — Digital supply voltage |
| 腳位 30 | GND — Ground |
| 腳位 31 | SWDIO — Serial Wire Debug I/O (PA31) |
| 腳位 32 | SWCLK — Serial Wire Debug Clock (PA30) |
典型應用
ATSAMD20E15A-AN 適用於 6 應用s: Home Automation Hubs, Consumer Wearables, Smart Energy Metering, Industrial Sensor Transmitters, Capacitive Touch User Interfaces, Battery-Powered IoT Edge Nodes.
Home Automation Hubs
The ATSAMD20E15A-AN is well suited for home automation endpoints such as smart thermostats, sensor hubs, and lighting controllers. Its 32-bit Cortex-M0+ at 48MHz executes Zigbee or Matter stack callbacks efficiently, while the 12-bit ADC with 350ksps supports temperature, humidity, and ambient light sensing through the 16 available analog channels. The six SERCOM modules configure flexibly as UART, SPI, or I2C, allowing simultaneous connection to sensors, wireless modules, and a local display. Low-power Backup mode with RTC running draws under 5 microamps, making battery-powered sensor nodes viable for multi-year deployments on two AA cells.
推薦
Consumer Wearables
Wearable bands and fitness trackers benefit from the ATSAMD20E15A-AN's combination of a Cortex-M0+ core, 256-channel Peripheral Touch Controller (PTC) for capacitive UI buttons, and 10-bit DAC for haptic feedback waveforms. At 48MHz the device delivers 2.14 CoreMark/MHz, enough to drive simple BLE link layer control and sensor fusion math. The 32KB Flash holds BLE stack plus application logic, while 4KB SRAM supports sensor buffering. Standby current below 5uA with RTC wakeup enables always-on step counting without daily charging.
推薦
Smart Energy Metering
In single-phase electricity meters and gas/water flow monitors, the ATSAMD20E15A-AN serves as the metrology MCU. The 12-bit ADC with 350ksps captures load current and voltage with sufficient resolution for class 1 accuracy metering, while the RTC with calendar mode handles time-of-use tariffs and tampering logging. The 32KB Flash supports DLMS/COSEM or IEC 62056 application code with secure firmware update via the on-chip NVMCTRL bootloader. Wide 1.62V to 3.63V supply tolerance allows direct battery backup or supercapacitor support during line outages.
推薦
Industrial Sensor Transmitters
Industrial 4-20mA loop-powered sensor transmitters and HMI panels use the ATSAMD20E15A-AN for signal conditioning and bus interfacing. The device's 1.62V to 3.63V range accepts common 3.3V and 5V-derived rails, and the 32-pin TQFP footprint supports standard industrial PCB layouts. The 12-bit ADC reads bridge pressure sensors or RTD-conditioned temperatures, while SERCOM modules drive RS-485 transceivers for Modbus RTU. AEC-Q100 qualified variants (ATSAMD20E15A-AUT) extend deployment to factory floor environments with extended -40C to +125C operation.
推薦
Capacitive Touch User Interfaces
The ATSAMD20E15A-AN's integrated 256-channel Peripheral Touch Controller (PTC) supports both self-capacitance and mutual-capacitance electrode patterns, enabling capacitive touch buttons, sliders, and wheels on appliances and consumer electronics without external touch ICs. Combined with the 32KB Flash for advanced UI firmware and the six SERCOM interfaces for display driving, the MCU replaces traditional mechanical keypads with waterproof glass-front designs. The 10-bit DAC generates analog feedback tones or piezo buzzer waveforms for user confirmation beeps.
推薦
Battery-Powered IoT Edge Nodes
Battery-powered IoT edge devices such as remote environmental monitors, asset trackers, and agricultural sensors rely on the ATSAMD20E15A-AN's multiple low-power modes. The Idle mode at 0.8mA/MHz keeps the core ready for sensor reads, Standby mode retains SRAM at 1.5uA, and Backup mode with RTC running drops to sub-5uA. The 12-bit ADC wakes the device on threshold-crossing events, while SERCOM-based I2C/SPI interfaces connect to environmental sensors and LoRa or sub-GHz radio modules for years-long battery life on a single lithium primary cell.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMD20E15A-AN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMD20E14A-AN | ATSAMD20E14B-AUT | ATSAMD20E14B-AU | ATSAMD20E14B-MUT |
|---|---|---|---|---|---|
| Package | 32-pin TQFP | 32-pin TQFP - same | 32-pin TQFP - same | 32-pin TQFP - same | 32-pin TQFP - 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 | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 32 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Operating Voltage | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +125 C (AEC-Q100) | -40 C to +105 C | -40 C to +125 C (AEC-Q100) |
主要差異化特點
- Highest Flash density in 32-pin TQFP SAMD20 family (對比ATSAMD20E14A-AN)
- B-silicon revision includes errata fixes (對比ATSAMD20E14B-AUT)
- Industrial temperature grade with full 48MHz operation (對比ATSAMD20E14B-AUT (AEC-Q100))
設計說明
Place a 1uF X7R ceramic capacitor within 2mm of the VDD pin and a 10nF decoupling cap on each VDDIO supply pin. The on-chip LDO requires a minimum bulk capacitance of 1uF per the SAM D20 datasheet; lower values can cause core instability at 48MHz operation. Add bulk capacitance (4.7uF) at the board entry point to suppress transient voltage drops during SERCOM radio bursts.
The 32-pin TQFP requires 0.8mm pitch pads with 0.3mm signal traces escaped between pins. Route SWDIO and SWCLK with 50-ohm characteristic impedance and place test points for in-circuit programming access. The exposed pad (EP) on TQFP is the die substrate and should be soldered to a grounded copper pour for thermal dissipation and electrical reference.
Do not leave the RESET pin floating; tie PA28/RESET to VDD through a 10kohm pull-up and add a 1nF capacitor to ground for debouncing. Avoid configuring the XIN/XOUT pins as GPIO unless the external crystal is removed, as stray capacitance can prevent oscillator startup. When migrating from ATSAMD20E15A-AU (tray) to ATSAMD20E15A-ANT (tape and reel), verify the reel orientation matches pick-and-place feeders.
合規資訊
RoHS and REACH compliant per Microchip product environmental certification. The ATSAMD20E15A-AN is industrial grade -40C to +105C; for AEC-Q100 qualified parts select ATSAMD20E15A-AUT or ATSAMD20E14B-MUT variants.
