component
ATSAMD20E18A-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.
main
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"description": "Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"embedded processors & controllers",
"atsamd20e18a-au",
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"component": {
"mpn": "ATSAMD20E18A-AU",
"manufacturer": "Microchip Tech",
"package": "TQFP-32(7x7)",
"pin_count": 32,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/70a692cf8b8dcfe634d1cacc20eac2ef.pdf",
"parts": {
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"lbr": "atsamd20e18a-au.lbr"
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"distributor_links": {
"lcsc": "C618758",
"digikey": "ATSAMD20E18A-AU-ND",
"mouser": "556-ATSAMD20E18A-AU"
},
"distributor_check": {
"checked_at": "2026-10-27T00:58:41Z",
"source": "Component Ocean /api/assign-pns",
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"pn": "ATSAMD20E18A-AU-ND",
"status": "found"
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"pn": "556-ATSAMD20E18A-AU",
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},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA00 (VDDANA domain) with EXTINT[0], SERCOM1 PAD[0] and TC2 WO[0] peripheral functions, and XIN32 32 kHz crystal input when XOSC32K is used."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA01 (VDDANA domain) with EXTINT[1], SERCOM1 PAD[1] and TC2 WO[1] peripheral functions, and XOUT32 32 kHz crystal output when XOSC32K is used."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA02 (VDDANA domain) with EXTINT[2], analog input AIN[0], PTC Y[0] and DAC output VOUT functions."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA03 (VDDANA domain) with EXTINT[3], ADC/DAC VREFA reference input, and analog input AIN[1] with PTC Y[1]."
},
{
"number": "5",
"name": "PA04",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA04 (VDDANA domain) with EXTINT[4], ADC VREFB reference input, analog input AIN[4] and AIN[0] with PTC Y[2], SERCOM0 PAD[0] and TC0 WO[0]."
},
{
"number": "6",
"name": "PA05",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA05 (VDDANA domain) with EXTINT[5], analog inputs AIN[5] and AIN[1] with PTC Y[3], SERCOM0 PAD[1] and TC0 WO[1]."
},
{
"number": "7",
"name": "PA06",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA06 (VDDANA domain) with EXTINT[6], analog inputs AIN[6] and AIN[2] with PTC Y[4], SERCOM0 PAD[2] and TC1 WO[0]."
},
{
"number": "8",
"name": "PA07",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA07 (VDDANA domain) with EXTINT[7], analog inputs AIN[7] and AIN[3] with PTC Y[5], SERCOM0 PAD[3] and TC1 WO[1]."
},
{
"number": "9",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply pin powering the ADC, AC, DAC, PTC and 32 kHz oscillators, with voltage 1.62 V to 3.63 V; VDDIO and VDDANA are internally connected in this package."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground pin for the digital power domain."
},
{
"number": "11",
"name": "PA08",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA08 (VDDIO domain) with I2C, NMI, analog input AIN[16], PTC X[0], SERCOM0 PAD[0], SERCOM2 PAD[0] and TC0 WO[0]."
},
{
"number": "12",
"name": "PA09",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA09 (VDDIO domain) with I2C, EXTINT[9], analog input AIN[17], PTC X[1], SERCOM0 PAD[1], SERCOM2 PAD[1] and TC0 WO[1]."
},
{
"number": "13",
"name": "PA10",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA10 (VDDIO domain) with EXTINT[10], analog input AIN[18], PTC X[2], SERCOM0 PAD[2], SERCOM2 PAD[2], TC1 WO[0] and GCLK_IO[4]."
},
{
"number": "14",
"name": "PA11",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA11 (VDDIO domain) with EXTINT[11], analog input AIN[19], PTC X[3], SERCOM0 PAD[3], SERCOM2 PAD[3], TC1 WO[1] and GCLK_IO[5]."
},
{
"number": "15",
"name": "PA14",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA14 (VDDIO domain) with EXTINT[14], SERCOM2 PAD[2], SERCOM4 PAD[2], TC3 WO[0] and GCLK_IO[0]; it is also the XIN crystal oscillator input when XOSC is used."
},
{
"number": "16",
"name": "PA15",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA15 (VDDIO domain) with EXTINT[15], SERCOM2 PAD[3], SERCOM4 PAD[3], TC3 WO[1] and GCLK_IO[1]; it is also the XOUT crystal oscillator output when XOSC is used."
},
{
"number": "17",
"name": "PA16",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA16 (VDDIO domain) with I2C, EXTINT[0], PTC X[4], SERCOM1 PAD[0], SERCOM3 PAD[0], TC2 WO[0] and GCLK_IO[2]."
},
{
"number": "18",
"name": "PA17",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA17 (VDDIO domain) with I2C, EXTINT[1], PTC X[5], SERCOM1 PAD[1], SERCOM3 PAD[1], TC2 WO[1] and GCLK_IO[3]."
},
{
"number": "19",
"name": "PA18",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA18 (VDDIO domain) with EXTINT[2], PTC X[6], SERCOM1 PAD[2], SERCOM3 PAD[2], TC3 WO[0] and AC CMP[0]."
},
{
"number": "20",
"name": "PA19",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA19 (VDDIO domain) with EXTINT[3], PTC X[7], SERCOM1 PAD[3], SERCOM3 PAD[3], TC3 WO[1] and AC CMP[1]."
},
{
"number": "21",
"name": "PA22",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA22 (VDDIO domain) with I2C, EXTINT[6], PTC X[10], SERCOM3 PAD[0], SERCOM5 PAD[0], TC4 WO[0] and GCLK_IO[6]."
},
{
"number": "22",
"name": "PA23",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA23 (VDDIO domain) with I2C, EXTINT[7], PTC X[11], SERCOM3 PAD[1], SERCOM5 PAD[1], TC4 WO[1] and GCLK_IO[7]."
},
{
"number": "23",
"name": "PA24",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA24 (VDDIO domain) with EXTINT[12], SERCOM3 PAD[2], SERCOM5 PAD[2] and TC5 WO[0]."
},
{
"number": "24",
"name": "PA25",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA25 (VDDIO domain) with EXTINT[13], SERCOM3 PAD[3], SERCOM5 PAD[3] and TC5 WO[1]."
},
{
"number": "25",
"name": "PA27",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA27 (VDDIO domain) with EXTINT[15] and GCLK_IO[0]."
},
{
"number": "26",
"name": "RESET",
"type": "input",
"description": "External active-low reset input; the RESET pin has an internal pull-up and its low-level threshold is below 0.33 times VDDIO for 1.6 V to 2.0 V VDDIO or below 0.36 times VDDIO for 2.7 V to 3.6 V VDDIO."
},
{
"number": "27",
"name": "PA28",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA28 (VDDIO domain) with EXTINT[8] and GCLK_IO[0]."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground pin for the digital power domain."
},
{
"number": "29",
"name": "VDDCORE",
"type": "power_out",
"description": "Internal regulated core voltage output of 1.2 V that powers the core, memories, peripherals and DFLL48M, decoupled per the schematic checklist."
},
{
"number": "30",
"name": "VDDIN",
"type": "power_in",
"description": "Input supply for I/O lines and the internal voltage regulator, operating from 1.62 V to 3.63 V."
},
{
"number": "31",
"name": "PA30",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA30 (VDDIO domain) with EXTINT[10], SERCOM1 PAD[2], TC1 WO[0], GCLK_IO[0] and the SWCLK serial wire debug clock function."
},
{
"number": "32",
"name": "PA31",
"type": "bidirectional",
"description": "Port A general-purpose I/O pin PA31 (VDDIO domain) with EXTINT[11], SERCOM1 PAD[3] and TC1 WO[1], and the SWDIO serial wire debug data function active when a debugger is present."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": null,
"consensus": "skipped (clean text read)",
"guards": "pin_guards 0.1: passed",
"guard_notes": [],
"pages_sent": 142,
"cost_usd": 0.0068,
"at": "2026-10-27T00:57:57"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/70a692cf8b8dcfe634d1cacc20eac2ef.pdf",
"pages": 731,
"sha256": "2505526f248dd8c2",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 32,
"described": 32,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"checked": "2026-10-27",
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"sha256": "96758109980dc092896e8dd6258893e523c235159390bdab0c5e1a96d5adf56d",
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