ATSAMC20E18A-AUT - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip
MPN： ATSAMC20E18A-AUT ✓ 啟用中ATSAMC20E18A-AUT 概覽
A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), and programmable peripherals. The Cortex-M0+ is an ARM 32-bit core optimized for energy efficiency and deterministic interrupt response, widely adopted in cost-sensitive embedded designs. Within the broader component taxonomy, the SAM C20 sits in this hierarchy: ARM Cortex-M0+ -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. Its 5 V I/O tolerance is a deliberate feature that allows designers to retain legacy analog front-ends while migrating away from older 8-bit PIC16/PIC18 designs.
Key features of the ATSAMC20E18A-AUT include full 5 V supply tolerance, six SERCOM peripherals configurable as UART/SPI/I2C, a CAN-FD controller, a 12-bit ADC, a 16-bit Sigma-Delta ADC, analog comparators, and a 24-bit Peripheral Touch Controller (PTC) for capacitive touch. The 32-pin TQFP-7x7 package provides a familiar footprint for drop-in upgrades from SAM D20 E-series parts. AEC-Q100 Grade 1 qualification extends the operating temperature range from -40 °C to +125 °C, suiting under-hood and industrial cabinet environments.
The SAM C20 architecture combines deterministic Cortex-M0+ performance with the 5 V I/O tolerance of legacy 8-bit MCUs, simplifying migration from PIC16/PIC18 designs while adding CAN-FD connectivity for industrial networks. The dedicated 8 KB Flash bank for EEPROM emulation spreads write cycles away from the main Flash, an important consideration for parameter storage in applications that log non-volatile settings.
Typical applications include industrial sensor nodes, HVAC controllers, automotive body and comfort ECUs, small BLDC motor drivers, white-goods control boards, and CAN-FD networked appliances. The combination of 5 V I/O, AEC-Q100 Grade 1, and CAN-FD makes it especially attractive as a drop-in upgrade path for designs migrating from PIC18 or older SAM D20 parts.
When designing with this part, ensure the 5 V supply is well decoupled with a 100 nF X7R capacitor close to each VDD pin and a bulk 4.7 µF tantalum or ceramic on the analog AVDD rail. For automotive CAN-FD networks, add a common-mode choke and ESD diode on the CANH/CANL lines and verify bus termination against ISO 11898-1.
This page synthesizes distributor pricing, same-family drop-in alternatives, and PCB design notes that go beyond the manufacturer datasheet summary.
直接替換替代品，適用於 ATSAMC20E18A-AUT — 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： ATSAMC20E18A-AUT （相同外形與佔位） — 差異在於 ADC, Package, Operating Temperature, Flash Memory, SERCOM Modules.
ATSAMC20E17A-AUT
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMC21E18A-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20E18A-AU
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMC20E18A-MUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20E18A-AUT 最大額定值與電氣特性
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark per MHz | 2.46 CoreMark/MHz |
| Flash Memory | 256 KB (in-system programmable) |
| EEPROM Emulation Flash | 8 KB (independent bank) |
| SRAM | 32 KB |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| I/O Tolerance | 5 V tolerant |
| ADC | 12-bit SAR + 16-bit Sigma-Delta |
| PTC Touch Channels | 24-bit Peripheral Touch Controller |
| Communication Peripherals | 6x SERCOM (UART/SPI/I2C), CAN-FD |
| Analog Comparators | Yes |
| Memory Protection Unit (MPU) | Yes |
| Micro Trace Buffer | Yes |
| 工作溫度 | -40 °C to +85 °C (Industrial) |
| 封裝 | 32-pin TQFP (7x7 mm) |
| 安裝類型 | Surface Mount |
| AEC-Q100 Grade | Grade 1 |
| RoHS 狀態 | Compliant |
ATSAMC20E18A-AUT 腳位配置
| 腳位 1 | PA00 — GPIO / SERCOM / ADC |
| 腳位 2 | PA01 — GPIO / SERCOM / ADC |
| 腳位 3 | PA02 — GPIO / SERCOM / ADC |
| 腳位 4 | PA03 — GPIO / SERCOM / ADC |
| 腳位 5 | PA04 — GPIO / SERCOM / ADC |
| 腳位 6 | PA05 — GPIO / SERCOM / ADC |
| 腳位 7 | PA06 — GPIO / SERCOM / ADC |
| 腳位 8 | PA07 — GPIO / SERCOM / ADC |
| 腳位 9 | PA08 — GPIO / SERCOM / ADC |
| 腳位 10 | PA09 — GPIO / SERCOM / ADC |
| 腳位 11 | PA10 — GPIO / SERCOM / ADC |
| 腳位 12 | PA11 — GPIO / SERCOM / ADC |
| 腳位 13 | PA14 — GPIO / SERCOM / ADC |
| 腳位 14 | PA15 — GPIO / SERCOM / ADC |
| 腳位 15 | PA16 — GPIO / SERCOM / ADC |
| 腳位 16 | PA17 — GPIO / SERCOM / ADC |
| 腳位 17 | PA18 — GPIO / SERCOM / ADC |
| 腳位 18 | PA19 — GPIO / SERCOM / ADC |
| 腳位 19 | PA20 — GPIO / SERCOM / ADC |
| 腳位 20 | PA21 — GPIO / SERCOM / ADC |
| 腳位 21 | GND — Ground |
| 腳位 22 | VDDIO — I/O supply (2.7-5.5 V) |
| 腳位 23 | VDDIN — Main supply (2.7-5.5 V) |
| 腳位 24 | RESET — Reset (active-low) |
| 腳位 25 | SWCLK — SWD clock (debug) |
| 腳位 26 | SWDIO — SWD data (debug) |
| 腳位 27 | PA24 — GPIO / SERCOM / ADC |
| 腳位 28 | PA25 — GPIO / SERCOM / ADC |
| 腳位 29 | PA27 — GPIO / SERCOM / ADC |
| 腳位 30 | PA28 — GPIO / SERCOM / ADC |
| 腳位 31 | PA30 — GPIO / SERCOM / ADC |
| 腳位 32 | PA31 — GPIO / SERCOM / ADC |
典型應用
ATSAMC20E18A-AUT 適用於 6 應用s: Industrial CAN-FD Sensor Nodes, HVAC Climate Controllers, Automotive Body and Comfort ECUs, White Goods and Appliance Control Boards, Small BLDC Motor Drivers, Touch-Key User Interfaces with PTC.
Industrial CAN-FD Sensor Nodes
The ATSAMC20E18A-AUT's integrated CAN-FD controller and 6x SERCOM channels make it a strong fit for distributed industrial sensor nodes on CANopen FD or SAE J1939-21 networks. Operating from a 5 V rail with 5 V-tolerant I/O eliminates level shifters when interfacing with legacy 5 V analog front-ends such as 4-20 mA loops or 0-10 V transducers. With 256 KB Flash and 32 KB SRAM, the device comfortably hosts protocol stacks like CANopen FD plus sensor conditioning libraries. The 48 MHz Cortex-M0+ delivers 2.46 CoreMark/MHz, leaving ample headroom for deterministic 1 ms control loops. AEC-Q100 Grade 1 qualification extends deployment to cabinets with elevated ambient temperatures, supporting 24/7 factory automation.
推薦
HVAC Climate Controllers
The ATSAMC20E18A-AUT suits HVAC control boards that combine 5 V analog sensor conditioning with CAN-FD bus connectivity for indoor air-handling units. Its 12-bit SAR ADC and 16-bit Sigma-Delta ADC handle temperature, humidity, and pressure sensor inputs directly, while the 24-bit PTC supports capacitive touch keypads on thermostats. AEC-Q100 Grade 1 qualification tolerates -40 °C to +125 °C ambient inside equipment cabinets, and 5 V I/O simplifies interfacing with Triac driver stages for fan and compressor control. With 256 KB Flash, designers can host full BACnet or Modbus gateways alongside scheduling firmware.
推薦
Automotive Body and Comfort ECUs
Body control modules, mirror adjusters, seat controllers, and interior lighting ECUs benefit from the ATSAMC20E18A-AUT's AEC-Q100 Grade 1 qualification and CAN-FD integration. The 32-TQFP-7x7 footprint is small enough for distributed ECUs behind interior trim, while 256 KB Flash and 32 KB SRAM are sufficient for LIN-substitute CAN-FD gateway logic and PWM-driven motor drivers. The Cortex-M0+ deterministic interrupt latency ensures predictable response for window lift and seat-position loops, and the 5 V I/O tolerates legacy analog switches and Hall-sensor interfaces without level translation.
推薦
White Goods and Appliance Control Boards
Washing machines, dishwashers, ovens, and induction cooktops use the ATSAMC20E18A-AUT for their main control MCU thanks to 5 V I/O tolerance, AEC-Q100 Grade 1 robustness, and an integrated PTC for capacitive touch user interfaces. The Cortex-M0+ core at 48 MHz runs motor-control libraries plus safety firmware, while CAN-FD connectivity supports newer appliance networks that replace legacy RS-485 buses. The dedicated 8 KB EEPROM-emulation Flash preserves main Flash endurance for cycle counters and user preferences that change frequently across the appliance's lifetime.
推薦
Small BLDC Motor Drivers
Low-power BLDC applications like small fans, pumps, and appliance blowers run on the ATSAMC20E18A-AUT thanks to its deterministic Cortex-M0+ interrupt response and integrated analog comparators for sensorless BEMF zero-cross detection. 256 KB Flash hosts sensorless FOC or trapezoidal commutation libraries, and the 16-bit Sigma-Delta ADC accurately samples phase currents via external amplifiers. The AEC-Q100 Grade 1 rating supports under-hood and outdoor fan installations where ambient temperatures reach +125 °C during summer operation.
推薦
Touch-Key User Interfaces with PTC
The 24-bit Peripheral Touch Controller on the ATSAMC20E18A-AUT replaces mechanical buttons with reliable capacitive touch pads behind glass or plastic overlays. Combined with 256 KB Flash and AEC-Q100 Grade 1, the device suits harsh-environment touch panels in industrial equipment, automotive interiors, and consumer appliances. The Cortex-M0+ executes PTC acquisition plus UI state machine on a single core, while the 5 V-tolerant I/O drives LED indicators and segment-LCD displays directly without external level shifters.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMC20E18A-AUT — 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 | ATSAMC20E17A-AUT | ATSAMC21E18A-AUT | ATSAMC20E18A-AU | ATSAMC20E18A-MUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-TQFP (7x7) | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-VQFN (5x5) |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Core Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Supply Voltage | 2.7-5.5 V | 2.7-5.5 V | 2.7-5.5 V | 2.7-5.5 V | 2.7-5.5 V |
| AEC-Q100 Grade | Grade 1 (-40C to +125C) | Grade 1 | Grade 1 | Industrial (-40C to +85C) | Grade 1 |
| CAN-FD | Yes | Yes | Yes (enhanced) | Yes | Yes |
| PTC Touch Channels | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
主要差異化特點
- 5V I/O tolerance with AEC-Q100 Grade 1 and CAN-FD (對比ATSAMD20E18A-AU)
- Dedicated 8 KB EEPROM-emulation Flash (對比ATSAMC20E17A-AUT)
- Same die, smaller 5x5 VQFN footprint (對比ATSAMC20E18A-MUT)
設計說明
The ATSAMC20E18A-AUT requires two decoupling strategies. Place a 100 nF X7R 0402 capacitor within 3 mm of every VDDIN and VDDIO pin to suppress high-frequency switching transients from the internal core and SERCOM. Add a bulk 4.7 µF X5R or tantalum capacitor close to the analog AVDD rail to stabilize the ADC reference during Sigma-Delta conversions. For automotive deployments, add a 10 µF reverse-polarity-protected bulk cap before the LDO input to absorb load-dump transients per ISO 7637-2.
The 32-pin TQFP-7x7 has a 0.8 mm pitch. Use a 4-layer PCB with a continuous ground plane beneath the device and route traces on inner layers to keep the top layer available for short, direct fan-out. Place the crystal (if not using the internal 8 MHz oscillator) within 5 mm of the XIN/XOUT pins and guard it with a ground ring to reduce EMI coupling into the CAN-FD bus. Keep the SWD/SWCK/SWDIO debug header accessible without removing the MCU footprint.
For CAN-FD bus signaling, place the MCP2562FD or similar external transceiver within 25 mm of the ATSAMC20E18A-AUT CAN pins to minimize stub length. Add a 120 Ω ±1% split termination with 4.7 nF-100 nF capacitors on each CANH/CANL node, and route the bus as a 100 Ω differential microstrip over a continuous ground plane on layer 2. Common-mode chokes (e.g. ACM2012) on CANH/CANL protect against ISO 7637-2 transient bursts, and TVS diodes such as SMBJ24CA clamp ESD events above ±8 kV contact discharge.
Do not assume all SAM C20 variants share the same pinout - the C20E (32 pins), C20G (48 pins), and C20J (64 pins) families have different peripheral mappings even on shared pins. Always re-export the Atmel Studio / MPLAB X project configuration when migrating between pin-count variants, and double-check that the SERCOM channel assignments match the GPIO pads used in your schematic. Also verify that the dedicated 8 KB EEPROM-emulation Flash is initialized in your startup code; leaving it uninitialized wastes memory and complicates later firmware updates.
Estimated: at 48 MHz with all six SERCOM channels active and CAN-FD running, the ATSAMC20E18A-AUT typically draws 15-25 mA from VDDIN, dissipating 75-125 mW on a 5 V supply. The TQFP-32 package thermal resistance θJA is approximately 60 °C/W on a standard 4-layer JEDEC test board, yielding a junction temperature rise of 4.5-7.5 °C above ambient. Under-hood automotive designs with +85 °C ambient still stay well below the +125 °C AEC-Q100 Grade 1 limit, but in fully sealed enclosures verify with a thermocouple measurement during worst-case firmware execution.
合規資訊
AEC-Q100 Grade 1 qualified per Microchip product page. RoHS and REACH compliant. Not applicable for non-automotive variants (ATSAMC20E18A-AU).
