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ATSAMD21E17A-AU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, TQFP-32(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
markdownATSAMD21E17A-AU
Microchip Tech · Pre-ordered MCUs · TQFP-32(7x7)
ATSAMD21E17A-AU from Microchip Tech, in a TQFP-32(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 | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[0] and the XIN32 32 kHz crystal input when XOSC32K is enabled. |
| 2 | PA01 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[1] and the XOUT32 32 kHz crystal output when XOSC32K is enabled. |
| 3 | PA02 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[2], analog input AIN[0], PTC input Y[0] and DAC output VOUT. |
| 4 | PA03 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[3], the external analog reference VREFA, analog input AIN[1] and PTC input Y[1]. |
| 5 | PA04 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[4], the external analog reference VREFB, and analog input AIN[4]. |
| 6 | PA05 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[5] and analog input AIN[5]. |
| 7 | PA06 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[6] and analog input AIN[6]. |
| 8 | PA07 | bidirectional | General-purpose I/O on the VDDANA analog supply domain, also EXTINT[7] and analog input AIN[7]. |
| 9 | VDDANA | power_in | Analog supply voltage, specified at 1.62V to 3.63V with decoupling of 100nF and 10µF. |
| 10 | GND | power_in | Ground for the digital domain. |
| 11 | PA08 | bidirectional | General-purpose I/O on the VDDIO domain, also the NMI non-maskable interrupt input, analog input AIN[16] and SERCOM0/PAD[0] with I2C high-speed capability. |
| 12 | PA09 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[9], analog input AIN[17] and SERCOM0/PAD[1] with I2C high-speed capability. |
| 13 | PA10 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[10], analog input AIN[18] and SERCOM0/PAD[2]. |
| 14 | PA11 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[11], analog input AIN[19] and SERCOM0/PAD[3]. |
| 15 | PA14 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[14] and the XIN crystal input when XOSC is enabled. |
| 16 | PA15 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[15] and the XOUT crystal output when XOSC is enabled. |
| 17 | PA16 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[0], SERCOM1/PAD[0] and SERCOM3/PAD[0]. |
| 18 | PA17 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[1], SERCOM1/PAD[1] and SERCOM3/PAD[1]. |
| 19 | PA18 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[2], SERCOM1/PAD[2] and analog comparator output AC/CMP[0]. |
| 20 | PA19 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[3], SERCOM1/PAD[3] and analog comparator output AC/CMP[1]. |
| 21 | PA22 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[6], SERCOM3/PAD[0] and SERCOM5/PAD[0], with I2C high-speed capability. |
| 22 | PA23 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[7], SERCOM3/PAD[1] and the 1 kHz USB start-of-frame output SOF 1kHz. |
| 23 | PA24 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[12] and the USB D- data line DM; a pull-up is recommended if the pin is unconnected to avoid extra power consumption below 1 mA. |
| 24 | PA25 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[13] and the USB D+ data line DP; a pull-up is recommended if the pin is unconnected to avoid extra power consumption below 1 mA. |
| 25 | PA27 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[15], TCC3/WO[6] and GCLK_IO[0]. |
| 26 | RESET | input | External reset input, active low, with an internal pull-up resistor; the low-level threshold is below 0.36 × VDDIO for VDDIO 2.7V to 3.6V. |
| 27 | PA28 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[8], TCC3/WO[7] and GCLK_IO[0]. |
| 28 | GND | power_in | Ground for the digital domain. |
| 29 | VDDCORE | power_out | Core supply output from the internal regulator, 1.6V to 1.8V, requiring a 1µF decoupling capacitor close to the device. |
| 30 | VDDIN | power_in | Input supply to the internal voltage regulator and I/O supply, specified at 1.62V to 3.63V. |
| 31 | PA30 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[10], TCC1/WO[0] and the SWCLK Serial Wire Debug clock pin, which should have a pull-up on the schematic. |
| 32 | PA31 | bidirectional | General-purpose I/O on the VDDIO domain, also EXTINT[11], TCC1/WO[1] and the SWDIO Serial Wire Debug data pin, active when a debugger is present. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-32(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 32 |
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 (VDD: VDDIN, VDDIO and VDDANA) | VDD | 1.62 | 3.63 | V | 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:
ATSAMD21E17A-AU - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atsamd21e17a-au-etched.step/atsamd21e17a-au-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atsamd21e17a-au.step/atsamd21e17a-au.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (1115 pp, sha256
503cf97e1fd7dbb2, 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).