ATSAMD20G15A-AU - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
MPN: ATSAMD20G15A-AU ✓ פעילATSAMD20G15A-AU סקירה
An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed by ARM Holdings as the smallest and most energy-efficient member of the Cortex-M family. The Cortex-M0+ sits within the broader taxonomy of microcontroller -> embedded processor -> system-on-chip (SoC) -> semiconductor. It combines Thumb-2 instruction set compatibility with a tightly coupled NVIC interrupt controller, making it well suited for deterministic real-time embedded control where low active power and standby current are critical.
Key differentiating features of the ATSAMD20G15A-AU include the Cortex-M0+ core at 48 MHz delivering 0.93 DMIPS/MHz, 32 KB single-cycle Flash access, an integrated SERCOM module providing up to six configurable USART/SPI/I2C serial interfaces, a 12-bit ADC with up to 350 ksps throughput, a 10-bit DAC, and full-speed USB 2.0 device support via the embedded USB transceiver. The device also integrates a 16-bit timer/counter, RTC, and a 32-bit real-time clock with calendar mode. Power features include an active current under 70 uA/MHz and a deep-sleep current below 1 uA with RTC retention.
Architecturally, the ATSAMD20G15A-AU uses a single-cycle hardware multiplier, single-cycle IO port access, and a peripheral event system that lets peripherals trigger each other without CPU intervention. The 1.62V to 3.6V supply range covers both 1.8V and 3.3V typical rails. The 48-pin TQFP footprint exposes up to 38 GPIO, the SERCOM channels, ADC inputs, USB D+/D-, SWD debug, and reset lines.
Typical applications include low-power IoT sensor nodes, home automation controllers, smart metering endpoints, industrial HMI modules, USB HID peripherals, and battery-powered consumer devices. The combination of Cortex-M0+ efficiency, deep SleepWalking peripherals, and integrated USB makes this part a versatile general-purpose MCU for cost-sensitive designs.
When designing with this MCU, allocate the 32 KB Flash carefully - reserve a dedicated bootloader region if you plan to use the SAM-BA or UF2 bootloader. Place a 1 uF decoupling capacitor close to VDD and a 0.1 uF capacitor on each VDDIO/VDDANA pin to meet the analog noise floor of the 12-bit ADC.
This page synthesizes distributor pricing, same-family drop-in alternatives from Microchip's SAM D20 lineup, cross-brand Cortex-M0+ equivalents, application notes, and practical design guidance that goes beyond the manufacturer datasheet.
חלופות תחליף ישיר עבור ATSAMD20G15A-AU — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ATSAMD20G15A-AU (אותו גורם צורה וטביעת רגל) — שונים ב ADC, Package, Peripheral Touch Controller (PTC), Core, DAC.
ATSAMD20G15A-AUT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATSAMD20G15B-AU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATSAMD20G15A-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20E15A-AU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20G14A-AU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATSAMD20G15A-AU דירוגים מרביים ומאפיינים חשמליים
| Manufacturer | Microchip Technology (formerly Atmel) |
| Series | SAM D20 |
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 32 KB |
| SRAM | 4 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| מארז | 48-pin TQFP (7x7 mm) |
| GPIO Count | 38 (max) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit |
| Serial Interfaces (SERCOM) | Up to 6 configurable (USART/SPI/I2C) |
| USB | USB 2.0 Full-Speed Device |
| טווח טמפרטורת פעולה | -40 C to +85 C (industrial) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של ATSAMD20G15A-AU
| פין 1 | PA00 — General-purpose I/O, can serve as XIN crystal oscillator input |
| פין 2 | PA01 — General-purpose I/O, can serve as XOUT crystal oscillator output |
| פין 3 | PA02 — General-purpose I/O / analog AIN0 / VREFA |
| פין 4 | PA03 — General-purpose I/O / analog AIN1 / VREFB |
| פין 5 | GND — Ground |
| פין 6 | VDDIO — I/O supply voltage (1.62V-3.6V) |
| פין 7 | VDDANA — Analog supply voltage (1.62V-3.6V) |
| פין 8 | PA04 — General-purpose I/O / analog AIN4 / DAC VREFP |
| פין 9 | PA05 — General-purpose I/O / analog AIN5 |
| פין 10 | PA06 — General-purpose I/O / analog AIN6 |
| פין 11 | PA07 — General-purpose I/O / analog AIN7 |
| פין 12 | PA08 — General-purpose I/O, SERCOM0 alternative |
| פין 13 | PA09 — General-purpose I/O, SERCOM0 alternative |
| פין 14 | PA10 — General-purpose I/O, SERCOM0 alternative |
| פין 15 | PA11 — General-purpose I/O, SERCOM0/1 alternative |
| פין 16 | GND — Ground |
| פין 17 | VDDIO — I/O supply voltage (1.62V-3.6V) |
| פין 18 | PA12 — General-purpose I/O, SERCOM1 alternative |
| פין 19 | PA13 — General-purpose I/O, SERCOM1 alternative |
| פין 20 | PA14 — General-purpose I/O, SERCOM1 alternative |
| פין 21 | PA15 — General-purpose I/O, SERCOM1/3 alternative |
| פין 22 | PA16 — General-purpose I/O, SERCOM1/3 alternative, I2S SD0 |
| פין 23 | PA17 — General-purpose I/O, SERCOM1/3 alternative, I2S SD1 |
| פין 24 | PA18 — General-purpose I/O, SERCOM3 alternative |
| פין 25 | PA19 — General-purpose I/O, SERCOM3 alternative |
| פין 26 | PA20 — General-purpose I/O, SERCOM3/5 alternative |
| פין 27 | PA21 — General-purpose I/O, SERCOM3/5 alternative |
| פין 28 | PA22 — General-purpose I/O, SERCOM5 alternative |
| פין 29 | PA23 — General-purpose I/O, SERCOM5 alternative |
| פין 30 | PA24 — General-purpose I/O, USB D- pin |
| פין 31 | PA25 — General-purpose I/O, USB D+ pin |
| פין 32 | GND — Ground |
| פין 33 | VDDIO — I/O supply voltage (1.62V-3.6V) |
| פין 34 | PA26 — General-purpose I/O |
| פין 35 | PA27 — General-purpose I/O |
| פין 36 | PA28 — General-purpose I/O, Reset input |
| פין 37 | PA30 — General-purpose I/O, SWD clock |
| פין 38 | PA31 — General-purpose I/O, SWD data |
| פין 39 | PB00 — General-purpose I/O, SERCOM4 alternative |
| פין 40 | PB01 — General-purpose I/O, SERCOM4 alternative |
| פין 41 | PB02 — General-purpose I/O, SERCOM4 alternative, ADC AIN14 |
| פין 42 | PB03 — General-purpose I/O, SERCOM4 alternative, ADC AIN15 |
| פין 43 | PB04 — General-purpose I/O, SERCOM4 alternative |
| פין 44 | PB05 — General-purpose I/O, SERCOM4 alternative |
| פין 45 | PB06 — General-purpose I/O, SERCOM4 alternative |
| פין 46 | PB07 — General-purpose I/O, SERCOM4 alternative |
| פין 47 | PB08 — General-purpose I/O, SERCOM4 alternative, I2S MCK0 |
| פין 48 | PB09 — General-purpose I/O, SERCOM4 alternative, I2S MCK1 |
יישומים טיפוסיים
ATSAMD20G15A-AU מתאים עבור 6 יישוםs: Low-Power IoT Sensor Node, Home Automation Controller, Smart Metering Endpoint, Industrial HMI Module, USB HID Peripheral Device, Battery-Powered Consumer Wearable.
Low-Power IoT Sensor Node
The ATSAMD20G15A-AU's Cortex-M0+ core at 48 MHz and sub-70 uA/MHz active current make it a strong fit for battery-powered IoT sensor nodes drawing under 1 uA in deep-sleep. The 12-bit 350 ksps ADC captures environmental data directly, while the six SERCOM channels handle SPI sensor interfaces and I2C peripherals. The integrated SleepWalking event system lets peripherals trigger data acquisition without waking the CPU, extending coin-cell life to multi-year ranges.
מומלץ
Home Automation Controller
For smart-home hubs and wall-mounted controllers, the ATSAMD20G15A-AU offers 32 KB Flash for protocol stacks like Zigbee or BLE HCI plus 4 KB SRAM for buffer management. Its full-speed USB 2.0 device port simplifies commissioning over USB-C, while 38 GPIO in the 48-pin TQFP easily drives relay triacs, tri-color LEDs, and capacitive touch pads. The 1.62V-3.6V supply range tolerates 3.3V rails and 1.8V battery chemistries without level shifters.
מומלץ
Smart Metering Endpoint
Industrial smart meters benefit from the ATSAMD20G15A-AU's 12-bit ADC accurate to within +/- 2 LSB and hardware 16-bit timer for kWh pulse counting. The 32 KB Flash holds DLMS/COSEM or IEC 62056 protocol stacks while 4 KB SRAM buffers measurement frames. Deep-sleep current below 1 uA with RTC retention extends lithium-thionyl battery life beyond 10 years, meeting utility metering reliability targets.
מומלץ
Industrial HMI Module
The ATSAMD20G15A-AU drives small industrial HMIs with its 12-bit ADC reading potentiometers and the 10-bit DAC outputting 4-20 mA control loops. The 48-pin TQFP exposes enough SERCOM channels for RS-485 transceivers (via USART), SPI displays, and I2C EEPROM logging. The 48 MHz core refreshes character LCDs and basic TFTs at 60 Hz, while industrial -40 C to +85 C temperature rating survives factory floor conditions.
מומלץ
USB HID Peripheral Device
The ATSAMD20G15A-AU integrates a full-speed USB 2.0 device controller with internal transceiver, eliminating the need for an external PHY and supporting HID, CDC, and vendor-class interfaces directly. The 32 KB Flash accommodates USB stacks and composite descriptors, while 4 KB SRAM manages endpoint buffers and HID report buffers. The 48 MHz Cortex-M0+ comfortably handles 1 kHz polling rates and boot-keyboard firmware.
מומלץ
Battery-Powered Consumer Wearable
Wearable fitness bands and BLE beacons leverage the ATSAMD20G15A-AU's deep-sleep current under 1 uA to operate for weeks on a 100 mAh Li-Po cell. The six SERCOM channels connect to heart-rate sensors, accelerometers, and BLE modules via SPI or I2C, while the 10-bit DAC drives haptic feedback drivers. The compact 48-pin TQFP 7x7 mm footprint and 1.62V minimum supply suit single-cell Li-Po designs with a 1.8V LDO.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ATSAMD20G15A-AU — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ATSAMD20G15A-AUT | ATSAMD20G15B-AU | ATSAMD20G15A-MU | ATSAMD20E15A-AU | ATSAMD20G14A-AU |
|---|---|---|---|---|---|---|
| Package | TQFP-48 (7x7 mm) | TQFP-48 (7x7) - same | TQFP-48 (7x7) - same | TQFP-48 (7x7) - same | TQFP-48 (7x7) - same | TQFP-48 (7x7) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core / Max Clock | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz |
| Flash / SRAM | 32 KB / 4 KB | 32 KB / 4 KB | 32 KB / 4 KB | 32 KB / 4 KB | 64 KB / 8 KB | 16 KB / 2 KB |
| USB | USB FS Device | USB FS Device | USB FS Device | USB FS Device | USB FS Device | USB FS Device |
| SERCOM Count | 6 | 6 | 6 | 6 | 6 | 6 |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Supply Voltage | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V |
מבדילים עיקריים
- Lowest active power in SAM D20 family at 48 MHz (לעומתATSAMD20E15A-AU)
- Full-speed USB 2.0 integrated without external PHY (לעומתATSAMD20G14A-AU)
- Industrial -40 C to +85 C operating range (לעומתConsumer-grade Cortex-M0+ MCUs)
הערות תכנון
Decouple every VDDIO/VDDANA pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, and add a single 1 uF bulk capacitor on the main VDDIO rail. The analog supply VDDANA should be filtered separately from the digital supply to keep 12-bit ADC noise below 1 LSB. Tie unused supply pins to the same rail - do not leave them floating. The 1.62V minimum supply allows direct Li-MnO2 coin-cell operation but requires a brown-out reset setting of 1.65V minimum.
Route the SWD signals (PA30 SWCLK, PA31 SWDIO) with ground reference below 50 mm trace length and avoid routing over noisy planes. Place a 4.7 kOhm pull-up on the RESET line (PA28) for safe cold-boot behavior. The USB D+/D- traces should be 45 ohms differential and matched within 0.5 mm to meet USB FS signal integrity. Keep the crystal traces short and guarded by a ground ring to avoid oscillator crosstalk with ADC sampling.
Do not exceed the 3.6V absolute maximum on any GPIO - even brief over-voltage events latch-up the part. The 32 KB Flash must reserve the top 1 KB row for the bootloader if you plan to use SAM-BA or UF2 bootloaders over USB. When migrating from ATSAMD20G15A-AU to ATSAMD20G15B-AU, re-check errata for revision B improvements; do not assume identical behavior across revisions.
מידע על תאימות
RoHS and REACH compliant per Microchip product page. Lead-free matte-tin plating. Halogen-free mold compound. Not AEC-Q100 qualified - choose ATSAMx family automotive variants for automotive applications.
