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ATSAMD21J17D-AU

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Microchip Tech Pre-ordered MCUs, TQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatsamd21j17d-aufactory-2.0.0extractor-text
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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ATSAMD21J17D-AU

Microchip Tech · Pre-ordered MCUs · TQFP-64(10x10)

ATSAMD21J17D-AU from Microchip Tech, in a TQFP-64(10x10). 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 GPIO on VDDANA with EXTINT[0], SERCOM1/PAD[0], TCC2/WO[0]; XIN32 pin of the 32kHz crystal oscillator.
2 PA01 bidirectional GPIO on VDDANA with EXTINT[1], SERCOM1/PAD[1], TCC2/WO[1]; XOUT32 pin of the 32kHz crystal oscillator.
3 PA02 bidirectional GPIO on VDDANA with EXTINT[2], ADC AIN[0], PTC Y[0], DAC VOUT, TCC3/WO[0].
4 PA03 bidirectional GPIO on VDDANA with EXTINT[3], ADC/DAC VREFA, ADC AIN[1], PTC Y[1], TCC3/WO[1].
5 PB04 bidirectional GPIO on VDDANA with EXTINT[4], ADC AIN[12], PTC Y[10].
6 PB05 bidirectional GPIO on VDDANA with EXTINT[5], ADC AIN[13], PTC Y[11].
7 GNDANA power_in Ground for the analog power domain.
8 VDDANA power_in Analog supply voltage, 1.62V-3.63V, with 100nF and 10uF decoupling recommended.
9 PB06 bidirectional GPIO on VDDANA with EXTINT[6], ADC AIN[14], PTC Y[12].
10 PB07 bidirectional GPIO on VDDANA with EXTINT[7], ADC AIN[15], PTC Y[13].
11 PB08 bidirectional GPIO on VDDANA with EXTINT[8], ADC AIN[2], PTC Y[14], SERCOM4/PAD[0], TC4/WO[0], TCC3/WO[6].
12 PB09 bidirectional GPIO on VDDANA with EXTINT[9], ADC AIN[3], PTC Y[15], SERCOM4/PAD[1], TC4/WO[1], TCC3/WO[7].
13 PA04 bidirectional GPIO on VDDANA with EXTINT[4], ADC/VREFB, ADC AIN[4], AC AIN[0], PTC Y[2], SERCOM0/PAD[0], TCC0/WO[0], TCC3/WO[2].
14 PA05 bidirectional GPIO on VDDANA with EXTINT[5], ADC AIN[5], AC AIN[1], PTC Y[3], SERCOM0/PAD[1], TCC0/WO[1], TCC3/WO[3].
15 PA06 bidirectional GPIO on VDDANA with EXTINT[6], ADC AIN[6], AC AIN[2], PTC Y[4], SERCOM0/PAD[2], TCC1/WO[0], TCC3/WO[4].
16 PA07 bidirectional GPIO on VDDANA with EXTINT[7], ADC AIN[7], AC AIN[3], PTC Y[5], SERCOM0/PAD[3], TCC1/WO[1], TCC3/WO[5], I2S/SD[0].
17 PA08 bidirectional GPIO on VDDIO with NMI, ADC AIN[16], PTC X[0], SERCOM0/PAD[0], SERCOM2/PAD[0], TCC0/WO[0], TCC1/WO[2], I2S/SD[1].
18 PA09 bidirectional GPIO on VDDIO with EXTINT[9], ADC AIN[17], PTC X[1], SERCOM0/PAD[1], SERCOM2/PAD[1], TCC0/WO[1], TCC1/WO[3], I2S/MCK[0].
19 PA10 bidirectional GPIO on VDDIO with EXTINT[10], ADC AIN[18], PTC X[2], SERCOM0/PAD[2], SERCOM2/PAD[2], TCC1/WO[0], TCC0/WO[2], I2S/SCK[0], GCLK_IO[4].
20 PA11 bidirectional GPIO on VDDIO with EXTINT[11], ADC AIN[19], PTC X[3], SERCOM0/PAD[3], SERCOM2/PAD[3], TCC1/WO[1], TCC0/WO[3], I2S/FS[0], GCLK_IO[5].
21 VDDIO power_in Digital I/O supply voltage, 1.62V-3.63V, with 100nF and 10uF decoupling recommended.
22 GND power_in Ground.
23 PB10 bidirectional GPIO on VDDIO with EXTINT[10], SERCOM4/PAD[2], TC5/WO[0], TCC0/WO[4], I2S/MCK[1], GCLK_IO[4].
24 PB11 bidirectional GPIO on VDDIO with EXTINT[11], SERCOM4/PAD[3], TC5/WO[1], TCC0/WO[5], I2S/SCK[1], GCLK_IO[5].
25 PB12 bidirectional GPIO on VDDIO with EXTINT[12], PTC X[12], SERCOM4/PAD[0], TC4/WO[0], TCC0/WO[6], I2S/FS[1], GCLK_IO[6]; supports I2C Hs mode.
26 PB13 bidirectional GPIO on VDDIO with EXTINT[13], PTC X[13], SERCOM4/PAD[1], TC4/WO[1], TCC0/WO[7], GCLK_IO[7]; supports I2C Hs mode.
27 PB14 bidirectional GPIO on VDDIO with EXTINT[14], PTC X[14], SERCOM4/PAD[2], TC5/WO[0], GCLK_IO[0].
28 PB15 bidirectional GPIO on VDDIO with EXTINT[15], PTC X[15], SERCOM4/PAD[3], TC5/WO[1], GCLK_IO[1].
29 PA12 bidirectional GPIO on VDDIO with EXTINT[12], SERCOM2/PAD[0], SERCOM4/PAD[0], TCC2/WO[0], TCC0/WO[6], AC/CMP[0]; supports I2C Hs mode.
30 PA13 bidirectional GPIO on VDDIO with EXTINT[13], SERCOM2/PAD[1], SERCOM4/PAD[1], TCC2/WO[1], TCC0/WO[7], AC/CMP[1]; supports I2C Hs mode.
31 PA14 bidirectional GPIO on VDDIO with EXTINT[14], SERCOM2/PAD[2], SERCOM4/PAD[2], TC3/WO[0], TCC0/WO[4], GCLK_IO[0]; XIN of the crystal oscillator.
32 PA15 bidirectional GPIO on VDDIO with EXTINT[15], SERCOM2/PAD[3], SERCOM4/PAD[3], TC3/WO[1], TCC0/WO[5], GCLK_IO[1]; XOUT of the crystal oscillator.
33 GND power_in Ground.
34 VDDIO power_in Digital I/O supply voltage, 1.62V-3.63V, with 100nF and 10uF decoupling recommended.
35 PA16 bidirectional GPIO on VDDIO with EXTINT[0], PTC X[4], SERCOM1/PAD[0], SERCOM3/PAD[0], TCC2/WO[0], TCC0/WO[6], GCLK_IO[2]; supports I2C Hs mode.
36 PA17 bidirectional GPIO on VDDIO with EXTINT[1], PTC X[5], SERCOM1/PAD[1], SERCOM3/PAD[1], TCC2/WO[1], TCC0/WO[7], GCLK_IO[3]; supports I2C Hs mode.
37 PA18 bidirectional GPIO on VDDIO with EXTINT[2], PTC X[6], SERCOM1/PAD[2], SERCOM3/PAD[2], TC3/WO[0], TCC0/WO[2], AC/CMP[0].
38 PA19 bidirectional GPIO on VDDIO with EXTINT[3], PTC X[7], SERCOM1/PAD[3], SERCOM3/PAD[3], TC3/WO[1], TCC0/WO[3], I2S/SD[0], AC/CMP[1].
39 PB16 bidirectional GPIO on VDDIO with EXTINT[0], SERCOM5/PAD[0], TC6/WO[0], TCC0/WO[4], I2S/SD[1], GCLK_IO[2]; supports I2C Hs mode.
40 PB17 bidirectional GPIO on VDDIO with EXTINT[1], SERCOM5/PAD[1], TC6/WO[1], TCC0/WO[5], I2S/MCK[0], GCLK_IO[3]; supports I2C Hs mode.
41 PA20 bidirectional GPIO on VDDIO with EXTINT[4], PTC X[8], SERCOM5/PAD[2], SERCOM3/PAD[2], TC7/WO[0], TCC0/WO[6], I2S/SCK[0], GCLK_IO[4].
42 PA21 bidirectional GPIO on VDDIO with EXTINT[5], PTC X[9], SERCOM5/PAD[3], SERCOM3/PAD[3], TC7/WO[1], TCC0/WO[7], I2S/FS[0], GCLK_IO[5].
43 PA22 bidirectional GPIO on VDDIO with EXTINT[6], PTC X[10], SERCOM3/PAD[0], SERCOM5/PAD[0], TC4/WO[0], TCC0/WO[4], GCLK_IO[6]; supports I2C Hs mode.
44 PA23 bidirectional GPIO on VDDIO with EXTINT[7], PTC X[11], SERCOM3/PAD[1], SERCOM5/PAD[1], TC4/WO[1], TCC0/WO[5], USB SOF 1kHz, GCLK_IO[7]; supports I2C Hs mode.
45 PA24 bidirectional GPIO on VDDIO with EXTINT[12], SERCOM3/PAD[2], SERCOM5/PAD[2], TC5/WO[0], TCC1/WO[2], USB DM; enable a pull-up in GPIO input mode if left unconnected.
46 PA25 bidirectional GPIO on VDDIO with EXTINT[13], SERCOM3/PAD[3], SERCOM5/PAD[3], TC5/WO[1], TCC1/WO[3], USB DP; enable a pull-up in GPIO input mode if left unconnected.
47 GND power_in Ground.
48 VDDIO power_in Digital I/O supply voltage, 1.62V-3.63V, with 100nF and 10uF decoupling recommended.
49 PB22 bidirectional GPIO on VDDIO with EXTINT[6], SERCOM5/PAD[2], TC7/WO[0], TCC3/WO[0], GCLK_IO[0].
50 PB23 bidirectional GPIO on VDDIO with EXTINT[7], SERCOM5/PAD[3], TC7/WO[1], TCC3/WO[1], GCLK_IO[1].
51 PA27 bidirectional GPIO on VDDIO with EXTINT[15], TCC3/WO[6], GCLK_IO[0].
52 RESET input Active-low external reset input with internal pull-up; low-level threshold below 0.33VDDIO (VDDIO 1.6V-2.0V) or 0.36VDDIO (VDDIO 2.7V-3.6V).
53 PA28 bidirectional GPIO on VDDIO with EXTINT[8], TCC3/WO[7], GCLK_IO[0].
54 GND power_in Ground.
55 VDDCORE power_out Regulated core supply output, 1.6V to 1.8V, requiring external 1uF decoupling capacitor.
56 VDDIN power_in Input supply for the internal voltage regulator, 1.62V-3.63V.
57 PA30 bidirectional GPIO on VDDIO with EXTINT[10], SERCOM1/PAD[2], TCC1/WO[0], TCC3/WO[4], GCLK_IO[0]; SWCLK for serial wire debug.
58 PA31 bidirectional GPIO on VDDIO with EXTINT[11], SERCOM1/PAD[3], TCC1/WO[1], TCC3/WO[5]; SWDIO, active only in the presence of a debugger.
59 PB30 bidirectional GPIO on VDDIO with EXTINT[14], SERCOM5/PAD[0], TCC0/WO[0], TCC1/WO[2]; supports I2C Hs mode.
60 PB31 bidirectional GPIO on VDDIO with EXTINT[15], SERCOM5/PAD[1], TCC0/WO[1], TCC1/WO[3]; supports I2C Hs mode.
61 PB00 bidirectional GPIO on VDDANA with EXTINT[0], ADC AIN[8], PTC Y[6], SERCOM5/PAD[2], TC7/WO[0].
62 PB01 bidirectional GPIO on VDDANA with EXTINT[1], ADC AIN[9], PTC Y[7], SERCOM5/PAD[3], TC7/WO[1].
63 PB02 bidirectional GPIO on VDDANA with EXTINT[2], ADC AIN[10], PTC Y[8], SERCOM5/PAD[0], TC6/WO[0], TCC3/WO[2].
64 PB03 bidirectional GPIO on VDDANA with EXTINT[3], ADC AIN[11], PTC Y[9], SERCOM5/PAD[1], TC6/WO[1], TCC3/WO[3].

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-64(10x10)
Category Embedded Processors & Controllers
Pins 64

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 supply voltage (VDD, SAM D21) VDD 1.62 3.63 V VDDIO, VDDIN and VDDANA must be the same voltage 36
Operating temperature (U grade) -40 85 °C U = -40 - 85°C Matte Sn Plating 17
CPU clock frequency Fmax 48 MHz Arm Cortex-M0+ CPU running at up to 48 MHz 1
VDDCORE internal regulated voltage VDDCORE 1.2 V Internal regulated voltage output 36

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. 860

CAD (KiCad official)

  • Symbol: ATSAMD21J17D-AU
  • Footprint: Package_QFP:TQFP-64_10x10mm_P0.5mm
  • 3D model: TQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: atsamd21j17d-au-etched.step / atsamd21j17d-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsamd21j17d-au.step / atsamd21j17d-au.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (1115 pp, sha256 3bdc7b5b2d256025, retrieved 2026-10-26, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF