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ATSAME51N20A-AUT

Microchip Tech · Pre-ordered MCUs · TQFP-100(14x14)

ATSAME51N20A-AUT from Microchip Tech, in a TQFP-100(14x14). 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 PA00 with EIC EXTINT[0] and SERCOM1 PAD[0], shared with XIN32 of the XOSC32K 32.768 kHz crystal oscillator.
2 PA01 bidirectional General-purpose I/O PA01 with EIC EXTINT[1] and SERCOM1 PAD[1], shared with XOUT32 of the XOSC32K 32.768 kHz crystal oscillator.
3 PC00 bidirectional General-purpose I/O PC00 with EIC EXTINT[0] and ADC1 AIN[10]; it must stay static for XOSC32K crystal-mode behaviour and is also RTC tamper input IN3.
4 PC01 bidirectional General-purpose I/O PC01 with EIC EXTINT[1] and ADC1 AIN[11]; it must stay static for XOSC32K crystal-mode behaviour and is also RTC tamper input IN4.
5 PC02 bidirectional General-purpose I/O PC02 with EIC EXTINT[2] and ADC1 AIN[4].
6 PC03 bidirectional General-purpose I/O PC03 with EIC EXTINT[3] and ADC1 AIN[5].
7 PA02 bidirectional General-purpose I/O PA02 with EIC EXTINT[2], ADC0 AIN[0] and DAC VOUT[0]; it is also RTC tamper input IN2.
8 PA03 bidirectional General-purpose I/O PA03 with EIC EXTINT[3], ADC0 AIN[1], ANAREF VREFA and PTC X0/Y0.
9 PB04 bidirectional General-purpose I/O PB04 with EIC EXTINT[4], ADC1 AIN[6] and PTC X22/Y22.
10 PB05 bidirectional General-purpose I/O PB05 with EIC EXTINT[5], ADC1 AIN[7] and PTC X23/Y23.
11 GNDANA power_in Analog ground for the ADC, DAC and analog comparator blocks.
12 VDDANA power_in Analog supply for the analog peripherals; the device operating range is 1.71 V to 3.63 V.
13 PB06 bidirectional General-purpose I/O PB06 with EIC EXTINT[6], ADC1 AIN[8], PTC X24/Y24 and CCL IN[6].
14 PB07 bidirectional General-purpose I/O PB07 with EIC EXTINT[7], ADC1 AIN[9], PTC X25/Y25 and CCL IN[7].
15 PB08 bidirectional General-purpose I/O PB08 with EIC EXTINT[8], ADC0 AIN[2], ADC1 AIN[0], PTC X1/Y1, SERCOM4 PAD[0], TC4 WO[0] and CCL IN[8].
16 PB09 bidirectional General-purpose I/O PB09 with EIC EXTINT[9], ADC0 AIN[3], ADC1 AIN[1], PTC X2/Y2, SERCOM4 PAD[1], TC4 WO[1] and CCL OUT[2].
17 PA04 bidirectional General-purpose I/O PA04 with EIC EXTINT[4], ANAREF VREFB, ADC0 AIN[4], AC AIN[0], PTC X3/Y3, SERCOM0 PAD[0], TC0 WO[0] and CCL IN[0].
18 PA05 bidirectional General-purpose I/O PA05 with EIC EXTINT[5], ADC0 AIN[5], AC AIN[1], DAC VOUT[1], SERCOM0 PAD[1], TC0 WO[1] and CCL IN[1].
19 PA06 bidirectional General-purpose I/O PA06 with EIC EXTINT[6], ANAREF VREFC, ADC0 AIN[6], AC AIN[2], PTC X4/Y4, SERCOM0 PAD[2], TC1 WO[0] and CCL IN[2].
20 PA07 bidirectional General-purpose I/O PA07 with EIC EXTINT[7], ADC0 AIN[7], AC AIN[3], PTC X5/Y5, SERCOM0 PAD[3], TC1 WO[1] and CCL OUT[0].
21 PC05 bidirectional General-purpose I/O PC05 with EIC EXTINT[5] and SERCOM6 PAD[1].
22 PC06 bidirectional General-purpose I/O PC06 with EIC EXTINT[6], SERCOM6 PAD[2] and SDHC0 SDCD.
23 PC07 bidirectional General-purpose I/O PC07 with EIC EXTINT[9], SERCOM6 PAD[3] and SDHC0 SDWP.
24 GND power_in Digital ground reference.
25 VDDIOB power_in I/O supply for the VDDIOB pin group, which includes the I2C-capable pins PA08 and PA09.
26 PA08 bidirectional High-sink I/O PA08 with EIC NMI, ADC0 AIN[8], ADC1 AIN[2], PTC X6/Y6, SERCOM0 PAD[0], SERCOM2 PAD[1], TC0 WO[0], TCC0 WO[0], TCC1 WO[4], QSPI DATA[0], SDHC0 SDCMD, I2S MCK[0] and CCL IN[3].
27 PA09 bidirectional High-sink I/O PA09 with EIC EXTINT[9], ADC0 AIN[9], ADC1 AIN[3], PTC X7/Y7, SERCOM0 PAD[1], SERCOM2 PAD[0], TC0 WO[1], TCC0 WO[1], QSPI DATA[1], SDHC0 SDDAT[0], I2S FS[0] and CCL IN[4].
28 PA10 bidirectional General-purpose I/O PA10 with EIC EXTINT[10], ADC0 AIN[10], PTC X8/Y8, SERCOM0 PAD[2], SERCOM2 PAD[2], TC1 WO[0], TCC0 WO[2], QSPI DATA[2], SDHC0 SDDAT[1], I2S SCK[0], GCLK IO[4] and CCL IN[5].
29 PA11 bidirectional General-purpose I/O PA11 with EIC EXTINT[11], ADC0 AIN[11], PTC X9/Y9, SERCOM0 PAD[3], SERCOM2 PAD[3], TC1 WO[1], TCC0 WO[3], QSPI DATA[3], SDHC0 SDDAT[2], I2S SDO, GCLK IO[5] and CCL OUT[1].
30 VDDIOB power_in I/O supply for the VDDIOB pin group, which includes the I2C-capable pins PA08 and PA09.
31 GND power_in Digital ground reference.
32 PB10 bidirectional General-purpose I/O PB10 with EIC EXTINT[10], SERCOM4 PAD[2], TC5 WO[0], TCC0 WO[4], TCC1 WO[0], QSPI SCK, SDHC0 SDDAT[3], I2S SDI, GCLK IO[4] and CCL IN[11].
33 PB11 bidirectional General-purpose I/O PB11 with EIC EXTINT[11], SERCOM4 PAD[3], TC5 WO[1], TCC0 WO[5], TCC1 WO[1], QSPI CS, SDHC0 SDCK, I2S FS[1], GCLK IO[5] and CCL OUT[1].
34 PB12 bidirectional General-purpose I/O PB12 with EIC EXTINT[12], PTC X26/Y26, SERCOM4 PAD[0], TC4 WO[0], TCC3 WO[0], TCC0 WO[0], CAN1 TX, SDHC0 SDCD, I2S SCK[1] and GCLK IO[6].
35 PB13 bidirectional General-purpose I/O PB13 with EIC EXTINT[13], PTC X27/Y27, SERCOM4 PAD[1], TC4 WO[1], TCC3 WO[1], TCC0 WO[1], CAN1 RX, SDHC0 SDWP, I2S MCK[1] and GCLK IO[7].
36 PB14 bidirectional General-purpose I/O PB14 with EIC EXTINT[14], PTC X28/Y28, SERCOM4 PAD[2], TC5 WO[0], TCC4 WO[0], TCC0 WO[2], CAN1 TX, PCC DATA[8], GMAC GMDC, GCLK IO[0] and CCL IN[9].
37 PB15 bidirectional General-purpose I/O PB15 with EIC EXTINT[15], PTC X29/Y29, SERCOM4 PAD[3], TC5 WO[1], TCC4 WO[1], TCC0 WO[3], CAN1 RX, PCC DATA[9], GMAC GMDIO, GCLK IO[1] and CCL IN[10].
38 GND power_in Digital ground reference.
39 VDDIO power_in Digital I/O supply for its pin group; the device operating range is 1.71 V to 3.63 V.
40 PC10 bidirectional General-purpose I/O PC10 with EIC EXTINT[10], SERCOM6 PAD[2], SERCOM7 PAD[2], TCC0 WO[0] and TCC1 WO[4].
41 PC11 bidirectional General-purpose I/O PC11 with EIC EXTINT[11], SERCOM6 PAD[3], SERCOM7 PAD[3], TCC0 WO[1], TCC1 WO[5] and GMAC GMDC.
42 PC12 bidirectional General-purpose I/O PC12 with selectable peripheral functions A to N through the PORT multiplexer.
43 PC13 bidirectional General-purpose I/O PC13 with selectable peripheral functions A to N through the PORT multiplexer.
44 PC14 bidirectional General-purpose I/O PC14 with selectable peripheral functions A to N through the PORT multiplexer.
45 PC15 bidirectional General-purpose I/O PC15 with selectable peripheral functions A to N through the PORT multiplexer.
46 PA12 bidirectional High-sink I/O PA12 that supports SERCOM I2C on the VDDIO group, with selectable peripheral functions A to N.
47 PA13 bidirectional High-sink I/O PA13 that supports SERCOM I2C on the VDDIO group, with selectable peripheral functions A to N.
48 PA14 bidirectional I/O PA14 that is the XIN pin of the XOSC0 main crystal oscillator, with selectable peripheral functions A to N.
49 PA15 bidirectional I/O PA15 that is the XOUT pin of the XOSC0 main crystal oscillator, with selectable peripheral functions A to N.
50 GND power_in Digital ground reference.
51 VDDIO power_in Digital I/O supply for its pin group; the device operating range is 1.71 V to 3.63 V.
52 PA16 bidirectional High-sink I/O PA16 that supports SERCOM I2C on the VDDIO group, with selectable peripheral functions A to N.
53 PA17 bidirectional High-sink I/O PA17 that supports SERCOM I2C on the VDDIO group, with selectable peripheral functions A to N.
54 PA18 bidirectional General-purpose I/O PA18 with selectable peripheral functions A to N through the PORT multiplexer.
55 PA19 bidirectional General-purpose I/O PA19 with selectable peripheral functions A to N through the PORT multiplexer.
56 PC16 bidirectional General-purpose I/O PC16 with selectable peripheral functions A to N through the PORT multiplexer.
57 PC17 bidirectional General-purpose I/O PC17 with selectable peripheral functions A to N through the PORT multiplexer.
58 PC18 bidirectional General-purpose I/O PC18 with selectable peripheral functions A to N through the PORT multiplexer.
59 PC19 bidirectional General-purpose I/O PC19 with selectable peripheral functions A to N through the PORT multiplexer.
60 PC20 bidirectional General-purpose I/O PC20 with selectable peripheral functions A to N through the PORT multiplexer.
61 PC21 bidirectional General-purpose I/O PC21 with selectable peripheral functions A to N through the PORT multiplexer.
62 GND power_in Digital ground reference.
63 VDDIO power_in Digital I/O supply for its pin group; the device operating range is 1.71 V to 3.63 V.
64 PB16 bidirectional General-purpose I/O PB16 with selectable peripheral functions A to N through the PORT multiplexer.
65 PB17 bidirectional General-purpose I/O PB17 with selectable peripheral functions A to N through the PORT multiplexer.
66 PB18 bidirectional General-purpose I/O PB18 with selectable peripheral functions A to N through the PORT multiplexer.
67 PB19 bidirectional General-purpose I/O PB19 with selectable peripheral functions A to N through the PORT multiplexer.
68 PB20 bidirectional General-purpose I/O PB20 with EIC EXTINT[4], SERCOM3 PAD[0], SERCOM7 PAD[1], TCC1 WO[2], PDEC PDEC[2], SDHC1 SDDAT[2] and GCLK IO[6].
69 PB21 bidirectional General-purpose I/O PB21 with EIC EXTINT[5], SERCOM3 PAD[1], SERCOM7 PAD[0], TCC1 WO[3], SDHC1 SDDAT[3] and GCLK IO[7].
70 PA20 bidirectional General-purpose I/O PA20 with EIC EXTINT[4], PTC X14/Y14, SERCOM5 PAD[2], SERCOM3 PAD[2], TC7 WO[0], TCC1 WO[4], TCC0 WO[0], SDHC1 SDCMD, I2S FS[0], PCC DATA[4] and GMAC GMDC.
71 PA21 bidirectional General-purpose I/O PA21 with EIC EXTINT[5], PTC X15/Y15, SERCOM5 PAD[3], SERCOM3 PAD[3], TC7 WO[1], TCC1 WO[5], TCC0 WO[1], SDHC1 SDCK, I2S SDO, PCC DATA[5] and GMAC GMDIO.
72 PA22 bidirectional High-sink I/O PA22 with EIC EXTINT[6], PTC X16/Y16, SERCOM3 PAD[0], SERCOM5 PAD[1], TC4 WO[0], TCC1 WO[6], TCC0 WO[2], CAN0 TX, I2S SDI, PCC DATA[6] and CCL IN[6]; it supports SERCOM I2C on VDDIO.
73 PA23 bidirectional High-sink I/O PA23 with EIC EXTINT[7], PTC X17/Y17, SERCOM3 PAD[1], SERCOM5 PAD[0], TC4 WO[1], TCC1 WO[7], TCC0 WO[3], USB SOF 1 kHz, CAN0 RX, I2S FS[1], PCC DATA[7] and CCL IN[7]; it supports SERCOM I2C on VDDIO.
74 PA24 bidirectional General-purpose I/O PA24 with EIC EXTINT[8], SERCOM3 PAD[2], SERCOM5 PAD[2], TC5 WO[0], TCC2 WO[2], PDEC PDEC[0], USB DM, CAN0 TX and CCL IN[8].
75 PA25 bidirectional General-purpose I/O PA25 with EIC EXTINT[9], SERCOM3 PAD[3], SERCOM5 PAD[3], TC5 WO[1], PDEC PDEC[1], USB DP, CAN0 RX and CCL OUT[2].
76 GND power_in Digital ground reference.
77 VDDIO power_in Digital I/O supply for its pin group; the device operating range is 1.71 V to 3.63 V.
78 PB22 bidirectional General-purpose I/O PB22 with EIC EXTINT[6], SERCOM1 PAD[2], SERCOM5 PAD[2], TC7 WO[0], PDEC PDEC[2], USB SOF 1 kHz, GCLK IO[0] and CCL IN[0]; it is also XIN of XOSC1.
79 PB23 bidirectional General-purpose I/O PB23 with EIC EXTINT[7], SERCOM1 PAD[3], SERCOM5 PAD[3], TC7 WO[1], PDEC PDEC[0], GCLK IO[1] and CCL OUT[0]; it is also XOUT of XOSC1.
80 PB24 bidirectional General-purpose I/O PB24 with EIC EXTINT[8], SERCOM0 PAD[0], SERCOM2 PAD[1], PDEC PDEC[1] and AC CMP[0].
81 PB25 bidirectional General-purpose I/O PB25 with EIC EXTINT[9], SERCOM0 PAD[1], SERCOM2 PAD[0], PDEC PDEC[2] and AC CMP[1].
82 PC24 bidirectional General-purpose I/O PC24 with EIC EXTINT[8], SERCOM0 PAD[2], SERCOM2 PAD[2] and trace output TRACEDATA[3].
83 PC25 bidirectional General-purpose I/O PC25 with EIC EXTINT[9], SERCOM0 PAD[3], SERCOM2 PAD[3] and trace output TRACEDATA[2].
84 PC26 bidirectional General-purpose I/O PC26 with EIC EXTINT[10] and trace output TRACEDATA[1].
85 PC27 bidirectional General-purpose I/O PC27 with EIC EXTINT[11], SERCOM1 PAD[0], trace clock TRACECLK and CCL IN[4]; it takes the SWO role when trace is used in single-wire debug mode.
86 PC28 bidirectional General-purpose I/O PC28 with EIC EXTINT[12], SERCOM1 PAD[1], trace output TRACEDATA[0] and CCL IN[5].
87 PA27 bidirectional General-purpose I/O PA27 with EIC EXTINT[11], PTC X18/Y18 and GCLK IO[1].
88 RESETN input Active-low external reset input.
89 VDDCORE power_in Core voltage pin for the device's internal logic.
90 GND power_in Digital ground reference.
91 VSW power_out Switching-node pin associated with the embedded Buck/LDO regulator; its external connection is not described in the provided text.
92 VDDIO power_in Digital I/O supply for its pin group; the device operating range is 1.71 V to 3.63 V.
93 PA30 bidirectional I/O PA30 that is the SWCLK Serial Wire Debug clock, also with EIC EXTINT[14], PTC X19/Y19, SERCOM1/SERCOM7 PAD[2], TC6 WO[0], TCC2 WO[0], GCLK IO[0] and CCL IN[3].
94 PA31 bidirectional I/O PA31 that is the SWDIO Serial Wire Debug data pin, also with EIC EXTINT[15], SERCOM1/SERCOM7 PAD[3], TC6 WO[1], TCC2 WO[1] and CCL OUT[1].
95 PB30 bidirectional General-purpose I/O PB30 with EIC EXTINT[14], SERCOM7 PAD[0], SERCOM5 PAD[1], TC0 WO[0], TCC4 WO[0] and TCC0 WO[6]; it carries SWO in debug modes other than single-wire trace.
96 PB31 bidirectional General-purpose I/O PB31 with EIC EXTINT[15], SERCOM7 PAD[1], SERCOM5 PAD[0], TC0 WO[1], TCC4 WO[1] and TCC0 WO[7].
97 PB00 bidirectional General-purpose I/O PB00 with EIC EXTINT[0], ADC0 AIN[12], PTC X30/Y30, SERCOM5 PAD[2], TC7 WO[0] and CCL IN[1]; it is also RTC tamper input IN0 and part of the XOSC32K jitter-minimisation set.
98 PB01 bidirectional General-purpose I/O PB01 with EIC EXTINT[1], ADC0 AIN[13], PTC X31/Y31, SERCOM5 PAD[3], TC7 WO[1] and CCL IN[2]; it is also RTC tamper output OUT and SUPC OUT0, with RTC priority if both are enabled.
99 PB02 bidirectional General-purpose I/O PB02 with EIC EXTINT[2], ADC0 AIN[14], PTC X20/Y20, SERCOM5 PAD[0], TC6 WO[0], TCC2 WO[2] and CCL OUT[0]; it is also RTC tamper input IN1 and SUPC OUT1.
100 PB03 bidirectional General-purpose I/O PB03 with EIC EXTINT[3], ADC0 AIN[15], PTC X21/Y21, SERCOM5 PAD[1] and TC6 WO[1]; it is part of the XOSC32K jitter-minimisation set.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-100(14x14)
Category Embedded Processors & Controllers
Pins 100

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VDDIO (I/O, XOSCn, VDDCORE regulator input) VDDIO 1.71 3.63 V 46
Supply voltage VDDIOB (I/O B lines) VDDIOB 1.71 3.63 V 46
Supply voltage VDDANA (analog, ADC, AC, DAC, PTC) VDDANA 1.71 3.63 V 46
Supply voltage VBAT (Automatic Power Switch) VBAT 1.71 3.63 V 46
Operating temperature range (grade U, Industrial) -40 85 °C Operating at up to 120 MHz 1
Maximum operating frequency (DC to) 120 MHz -40°C to +85°C 1
VDDCORE internal regulator output voltage VDDCORE 1.2 V 46

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
housing pet nu1RBase nu1 I Crypto RAM u2RLength Base of R Base of R value filled repetitively with u4FillValue 1316
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. 1697

CAD (KiCad official)

  • Symbol: ATSAME51N20A-AUT
  • Footprint: Package_QFP:TQFP-100_14x14mm_P0.5mm
  • 3D model: TQFP-100(14x14) (KiCad packages3D, STEP)
  • 3D model files: atsame51n20a-aut-etched.step / atsame51n20a-aut-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsame51n20a-aut.step / atsame51n20a-aut.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (1934 pp, sha256 6f02ccc3e69325ab, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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