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ATSAMD21G17A-MU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, QFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownATSAMD21G17A-MU
Microchip Tech · Pre-ordered MCUs · QFN-48-EP(7x7)
ATSAMD21G17A-MU from Microchip Tech, in a QFN-48-EP(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | PA00 | bidirectional | Port A I/O pin PA00 powered from VDDANA; can be used as external interrupt EXTINT[0] or as the 32 kHz crystal input XIN32 when XOSC32K is enabled. |
| 2 | PA01 | bidirectional | Port A I/O pin PA01 powered from VDDANA; can be used as external interrupt EXTINT[1] or as the 32 kHz crystal output XOUT32 when XOSC32K is enabled. |
| 3 | PA02 | bidirectional | Port A I/O pin PA02 powered from VDDANA; provides analog input AIN[0] and DAC output VOUT, or external interrupt EXTINT[2] (analog functions require peripheral function B to be selected). |
| 4 | PA03 | bidirectional | Port A I/O pin PA03 powered from VDDANA; provides analog input AIN[1] and external reference VREFA, or external interrupt EXTINT[3] (analog functions require peripheral function B to be selected). |
| 5 | GNDANA | power_in | Ground for the analog domain (ADC, DAC, analog comparators and related analog pins). |
| 6 | VDDANA | power_in | Analog supply for the analog pins and analog peripherals; the SAM D21 operating voltage range is 1.62V - 3.63V. |
| 7 | PB08 | bidirectional | Port B I/O pin PB08 powered from VDDANA; provides analog input AIN[2], external interrupt EXTINT[8], SERCOM4 pad 0 and TC4 waveform output 0. |
| 8 | PB09 | bidirectional | Port B I/O pin PB09 powered from VDDANA; provides analog input AIN[3], external interrupt EXTINT[9], SERCOM4 pad 1 and TC4 waveform output 1. |
| 9 | PA04 | bidirectional | Port A I/O pin PA04 powered from VDDANA; provides analog input AIN[4], ADC external reference VREFB, external interrupt EXTINT[4] and SERCOM0 pad 0. |
| 10 | PA05 | bidirectional | Port A I/O pin PA05 powered from VDDANA; provides analog input AIN[5], external interrupt EXTINT[5] and SERCOM0 pad 1. |
| 11 | PA06 | bidirectional | Port A I/O pin PA06 powered from VDDANA; provides analog input AIN[6], external interrupt EXTINT[6] and SERCOM0 pad 2. |
| 12 | PA07 | bidirectional | Port A I/O pin PA07 powered from VDDANA; provides analog input AIN[7], external interrupt EXTINT[7] and SERCOM0 pad 3. |
| 13 | PA08 | bidirectional | Port A I/O pin PA08 powered from VDDIO; can be used as non-maskable interrupt NMI, analog input AIN[16], SERCOM0/SERCOM2 pad 0 or I2S SD[0]. |
| 14 | PA09 | bidirectional | Port A I/O pin PA09 powered from VDDIO; can be used as external interrupt EXTINT[9], analog input AIN[17], SERCOM0/SERCOM2 pad 1 or I2S SD[1]. |
| 15 | PA10 | bidirectional | Port A I/O pin PA10 powered from VDDIO; can be used as external interrupt EXTINT[10], analog input AIN[18], SERCOM0/SERCOM2 pad 2 or TCC1 waveform output 0. |
| 16 | PA11 | bidirectional | Port A I/O pin PA11 powered from VDDIO; can be used as external interrupt EXTINT[11], analog input AIN[19], SERCOM0/SERCOM2 pad 3 or TCC1 waveform output 1. |
| 17 | VDDIO | power_in | Digital I/O supply for the pin group it serves; the SAM D21 operating voltage range is 1.62V - 3.63V. |
| 18 | GND | power_in | Ground reference for the digital I/O and core domain. |
| 19 | PB10 | bidirectional | Port B I/O pin PB10 powered from VDDIO; can be used as external interrupt EXTINT[10], SERCOM4 pad 2, TC5 waveform output 0 or TCC0 waveform output 4. |
| 20 | PB11 | bidirectional | Port B I/O pin PB11 powered from VDDIO; can be used as external interrupt EXTINT[11], SERCOM4 pad 3, TC5 waveform output 1 or TCC0 waveform output 5. |
| 21 | PA12 | bidirectional | Port A I/O pin PA12 powered from VDDIO; can be used as external interrupt EXTINT[12], SERCOM2/SERCOM4 pad 0, TCC2 waveform output 0 or analog comparator output CMP[0]. |
| 22 | PA13 | bidirectional | Port A I/O pin PA13 powered from VDDIO; can be used as external interrupt EXTINT[13], SERCOM2/SERCOM4 pad 1, TCC2 waveform output 1 or analog comparator output CMP[1]. |
| 23 | PA14 | bidirectional | Port A I/O pin PA14 powered from VDDIO; can be used as external interrupt EXTINT[14], SERCOM2/SERCOM4 pad 2, TC3 waveform output 0 or GCLK_IO[0], and as crystal input XIN when XOSC is enabled. |
| 24 | PA15 | bidirectional | Port A I/O pin PA15 powered from VDDIO; can be used as external interrupt EXTINT[15], SERCOM2/SERCOM4 pad 3, TC3 waveform output 1 or GCLK_IO[1], and as crystal output XOUT when XOSC is enabled. |
| 25 | PA16 | bidirectional | Port A I/O pin PA16 powered from VDDIO; can be used as external interrupt EXTINT[0], SERCOM1/SERCOM3 pad 0, TCC2 waveform output 0 or GCLK_IO[2]. |
| 26 | PA17 | bidirectional | Port A I/O pin PA17 powered from VDDIO; can be used as external interrupt EXTINT[1], SERCOM1/SERCOM3 pad 1, TCC2 waveform output 1 or GCLK_IO[3]. |
| 27 | PA18 | bidirectional | Port A I/O pin PA18 powered from VDDIO; can be used as external interrupt EXTINT[2], SERCOM1/SERCOM3 pad 2, TC3 waveform output 0 or analog comparator output CMP[0]. |
| 28 | PA19 | bidirectional | Port A I/O pin PA19 powered from VDDIO; can be used as external interrupt EXTINT[3], SERCOM1/SERCOM3 pad 3, TC3 waveform output 1 or analog comparator output CMP[1]. |
| 29 | PA20 | bidirectional | Port A I/O pin PA20 powered from VDDIO; can be used as external interrupt EXTINT[4], SERCOM5/SERCOM3 pad 2, TC7 waveform output 0 or GCLK_IO[4]. |
| 30 | PA21 | bidirectional | Port A I/O pin PA21 powered from VDDIO; can be used as external interrupt EXTINT[5], SERCOM5/SERCOM3 pad 3, TC7 waveform output 1 or GCLK_IO[5]. |
| 31 | PA22 | bidirectional | Port A I/O pin PA22 powered from VDDIO; can be used as external interrupt EXTINT[6], SERCOM3/SERCOM5 pad 0, TC4 waveform output 0 or GCLK_IO[6], and supports SERCOM I2C. |
| 32 | PA23 | bidirectional | Port A I/O pin PA23 powered from VDDIO; can be used as external interrupt EXTINT[7], SERCOM3/SERCOM5 pad 1, TC4 waveform output 1, USB SOF 1kHz or GCLK_IO[7], and supports SERCOM I2C. |
| 33 | PA24 | bidirectional | Port A I/O pin PA24 powered from VDDIO; carries USB DM and can be used as external interrupt EXTINT[12], SERCOM3/SERCOM5 pad 2 or TC5 waveform output 0; a pull-up is recommended if the pin is unconnected to avoid extra power consumption (<1mA). |
| 34 | PA25 | bidirectional | Port A I/O pin PA25 powered from VDDIO; carries USB DP and can be used as external interrupt EXTINT[13], SERCOM3/SERCOM5 pad 3 or TC5 waveform output 1; a pull-up is recommended if the pin is unconnected to avoid extra power consumption (<1mA). |
| 35 | GND | power_in | Ground reference for the digital I/O and core domain. |
| 36 | VDDIO | power_in | Digital I/O supply for the pin group it serves; the SAM D21 operating voltage range is 1.62V - 3.63V. |
| 37 | PB22 | bidirectional | Port B I/O pin PB22 powered from VDDIO; can be used as external interrupt EXTINT[6], SERCOM5 pad 2, TC7 waveform output 0, TCC3 waveform output 0 or GCLK_IO[0]. |
| 38 | PB23 | bidirectional | Port B I/O pin PB23 powered from VDDIO; can be used as external interrupt EXTINT[7], SERCOM5 pad 3, TC7 waveform output 1, TCC3 waveform output 1 or GCLK_IO[1]. |
| 39 | PA27 | bidirectional | Port A I/O pin PA27 powered from VDDIO; can be used as external interrupt EXTINT[15], TCC3 waveform output 6 or GCLK_IO[0]. |
| 40 | RESET | input | External active-low reset input for the device. |
| 41 | PA28 | bidirectional | Port A I/O pin PA28 powered from VDDIO; can be used as external interrupt EXTINT[8], TCC3 waveform output 7 or GCLK_IO[0]. |
| 42 | GND | power_in | Ground reference for the digital I/O and core domain. |
| 43 | VDDCORE | power_out | Regulated output supply of the internal voltage regulator that feeds the device core. |
| 44 | VDDIN | power_in | Input supply to the internal voltage regulator; the SAM D21 operating voltage range is 1.62V - 3.63V. |
| 45 | PA30 | bidirectional | Port A I/O pin PA30 powered from VDDIO; carries the SWCLK debug clock and can also be used as external interrupt EXTINT[10], SERCOM1 pad 2, TCC1 waveform output 0, TCC3 waveform output 4 or GCLK_IO[0]. |
| 46 | PA31 | bidirectional | Port A I/O pin PA31 powered from VDDIO; carries SWDIO (active only when a debugger is present) and can also be used as external interrupt EXTINT[11], SERCOM1 pad 3, TCC1 waveform output 1 or TCC3 waveform output 5. |
| 47 | PB02 | bidirectional | Port B I/O pin PB02 powered from VDDANA; provides analog input AIN[10], external interrupt EXTINT[2], SERCOM5 pad 0, TC6 waveform output 0 and TCC3 waveform output 2. |
| 48 | PB03 | bidirectional | Port B I/O pin PB03 powered from VDDANA; provides analog input AIN[11], external interrupt EXTINT[3], SERCOM5 pad 1, TC6 waveform output 1 and TCC3 waveform output 3. |
| 49 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | QFN-48-EP(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 49 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating voltage, VDDIO pin (I/O lines, OSC8M, XOSC) | VDDIO | 1.62 | 3.63 | V | 35 | ||
| Operating voltage, VDDIN pin (I/O lines and internal regulator) | VDDIN | 1.62 | 3.63 | V | 35 | ||
| Operating voltage, VDDANA pin (I/O lines, ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K) | VDDANA | 1.62 | 3.63 | V | 35 | ||
| Single main supply range, common VDD for VDDIN, VDDIO and VDDANA | VDD | 1.62 | 3.63 | V | Same voltage applied to VDDIN, VDDIO and VDDANA | 36 | |
| Operating temperature range, ordering grade U (-40 - 85°C Matte Sn Plating) | -40 | 85 | °C | Ordering code suffix U (package grade in MPN ATSAMD21G17A-MU) | 16 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In the self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor. | 859 |
CAD (KiCad official)
- Symbol:
ATSAMD21G17A-MU - Footprint:
Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm - 3D model: QFN-48-EP(7x7) (KiCad packages3D, STEP)
- 3D model files:
atsamd21g17a-mu-etched.step/atsamd21g17a-mu-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atsamd21g17a-mu.step/atsamd21g17a-mu.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (1153 pp, sha256
98766371fd0886dd, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).