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ATSAME51N20A-AU

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-100(14x14). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ATSAME51N20A-AU

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-100(14x14)

ATSAME51N20A-AU 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 PORT pin PA00 with EIC EXTINT[0], SERCOM1 PAD[0] and XIN32 for the 32.768 kHz crystal oscillator (XOSC32K).
2 PA01 bidirectional PORT pin PA01 with EIC EXTINT[1], SERCOM1 PAD[1] and XOUT32 for the 32.768 kHz crystal oscillator (XOSC32K).
3 PC00 bidirectional PORT pin PC00 with EIC EXTINT[0] and ADC1 AIN[10]; it must stay static for XOSC32K crystal-mode behavior.
4 PC01 bidirectional PORT pin PC01 with EIC EXTINT[1] and ADC1 AIN[11]; it must stay static for XOSC32K crystal-mode behavior.
5 PC02 bidirectional PORT pin PC02 with EIC EXTINT[2] and ADC1 AIN[4].
6 PC03 bidirectional PORT pin PC03 with EIC EXTINT[3] and ADC1 AIN[5].
7 PA02 bidirectional PORT pin PA02 with EIC EXTINT[2], ADC0 AIN[0] and DAC VOUT[0] output.
8 PA03 bidirectional PORT pin PA03 with EIC EXTINT[3], ADC0 AIN[1], ADC voltage reference VREFA and PTC X0/Y0.
9 PB04 bidirectional PORT pin PB04 with EIC EXTINT[4], ADC1 AIN[6] and PTC X22/Y22.
10 PB05 bidirectional PORT pin PB05 with EIC EXTINT[5], ADC1 AIN[7] and PTC X23/Y23.
11 GNDANA power_in Ground reference for the analog circuitry (ADC, DAC, AC, PTC).
12 VDDANA power_in Analog supply for the ADC, DAC and analog comparators, within the 1.71V to 3.63V device operating range.
13 PB06 bidirectional PORT pin PB06 with EIC EXTINT[6], ADC1 AIN[8], PTC X24/Y24 and CCL IN[6].
14 PB07 bidirectional PORT pin PB07 with EIC EXTINT[7], ADC1 AIN[9], PTC X25/Y25 and CCL IN[7].
15 PB08 bidirectional PORT pin PB08 with EIC EXTINT[8], ADC0 AIN[2], ADC1 AIN[0], SERCOM4 PAD[0] and CCL IN[8].
16 PB09 bidirectional PORT pin PB09 with EIC EXTINT[9], ADC0 AIN[3], ADC1 AIN[1], SERCOM4 PAD[1] and CCL OUT[2].
17 PA04 bidirectional PORT pin PA04 with EIC EXTINT[4], ADC0 AIN[4], ADC voltage reference VREFB, AC AIN[0] and SERCOM0 PAD[0].
18 PA05 bidirectional PORT pin PA05 with EIC EXTINT[5], ADC0 AIN[5], AC AIN[1], DAC VOUT[1] and SERCOM0 PAD[1].
19 PA06 bidirectional PORT pin PA06 with EIC EXTINT[6], ADC0 AIN[6], ADC voltage reference VREFC, AC AIN[2] and SERCOM0 PAD[2].
20 PA07 bidirectional PORT pin PA07 with EIC EXTINT[7], ADC0 AIN[7], AC AIN[3], SERCOM0 PAD[3] and SDHC0 SDWP.
21 PC05 bidirectional PORT pin PC05 with EIC EXTINT[5] and SERCOM6 PAD[1].
22 PC06 bidirectional PORT pin PC06 with EIC EXTINT[6], SERCOM6 PAD[2] and SDHC0 SDCD.
23 PC07 bidirectional PORT pin PC07 with EIC EXTINT[9], SERCOM6 PAD[3] and SDHC0 SDWP.
24 GND power_in Digital ground for the device.
25 VDDIOB power_in I/O supply for the PA08, PA09, PB10 to PB15 and PC pin clusters, within the 1.71V to 3.63V device operating range.
26 PA08 bidirectional High-sink PORT pin PA08 with EIC NMI, ADC0 AIN[8], ADC1 AIN[2], SERCOM0 PAD[0], SERCOM2 PAD[1], TCC0 WO[0] and I2C support.
27 PA09 bidirectional High-sink PORT pin PA09 with EIC EXTINT[9], ADC0 AIN[9], ADC1 AIN[3], SERCOM0 PAD[1] and I2C support.
28 PA10 bidirectional PORT pin PA10 with EIC EXTINT[10], ADC0 AIN[10], SERCOM0 PAD[2], SERCOM2 PAD[2] and TCC0 WO[2].
29 PA11 bidirectional PORT pin PA11 with EIC EXTINT[11], ADC0 AIN[11], SERCOM0 PAD[3] and SERCOM2 PAD[3].
30 VDDIOB power_in I/O supply for the PB10 to PB15 and PA08 to PA11 pin cluster, within the 1.71V to 3.63V device operating range.
31 GND power_in Digital ground for the device.
32 PB10 bidirectional PORT pin PB10 with EIC EXTINT[10], SERCOM4 PAD[2], TC5 WO[0] and QSPI SCK.
33 PB11 bidirectional PORT pin PB11 with EIC EXTINT[11], SERCOM4 PAD[3], TC5 WO[1] and QSPI CS.
34 PB12 bidirectional PORT pin PB12 with EIC EXTINT[12], PTC X26/Y26, SERCOM4 PAD[0] and CAN1 TX.
35 PB13 bidirectional PORT pin PB13 with EIC EXTINT[13], PTC X27/Y27, SERCOM4 PAD[1] and CAN1 RX.
36 PB14 bidirectional PORT pin PB14 with EIC EXTINT[14], PTC X28/Y28, SERCOM4 PAD[2] and CAN1 TX.
37 PB15 bidirectional PORT pin PB15 with EIC EXTINT[15], PTC X29/Y29, SERCOM4 PAD[3] and CAN1 RX.
38 GND power_in Digital ground for the device.
39 VDDIO power_in I/O supply for the PC10 to PC15 and PA12 to PA15 pin cluster, within the 1.71V to 3.63V device operating range.
40 PC10 bidirectional PORT pin PC10 with EIC EXTINT[10], SERCOM6 PAD[2], SERCOM7 PAD[2] and TCC0 WO[0].
41 PC11 bidirectional PORT pin PC11 with EIC EXTINT[11], SERCOM6 PAD[3], SERCOM7 PAD[3] and TCC0 WO[1].
42 PC12 bidirectional General-purpose PORT pin PC12; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
43 PC13 bidirectional General-purpose PORT pin PC13; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
44 PC14 bidirectional General-purpose PORT pin PC14; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
45 PC15 bidirectional General-purpose PORT pin PC15; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
46 PA12 bidirectional High-sink PORT pin PA12; its alternate peripheral functions are listed on page 34, which is not in the supplied text, and it supports I2C.
47 PA13 bidirectional High-sink PORT pin PA13; its alternate peripheral functions are listed on page 34, which is not in the supplied text, and it supports I2C.
48 PA14 bidirectional PORT pin PA14; its alternate peripheral functions are listed on page 34, which is not in the supplied text. It is also XIN of XOSC0.
49 PA15 bidirectional PORT pin PA15; its alternate peripheral functions are listed on page 34, which is not in the supplied text. It is also XOUT of XOSC0.
50 GND power_in Digital ground for the device.
51 VDDIO power_in I/O supply for the PA16 to PA19 and PC16 to PC21 pin cluster, within the 1.71V to 3.63V device operating range.
52 PA16 bidirectional High-sink PORT pin PA16; its alternate peripheral functions are listed on page 34, which is not in the supplied text, and it supports I2C.
53 PA17 bidirectional High-sink PORT pin PA17; its alternate peripheral functions are listed on page 34, which is not in the supplied text, and it supports I2C.
54 PA18 bidirectional PORT pin PA18; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
55 PA19 bidirectional PORT pin PA19; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
56 PC16 bidirectional General-purpose PORT pin PC16; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
57 PC17 bidirectional General-purpose PORT pin PC17; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
58 PC18 bidirectional General-purpose PORT pin PC18; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
59 PC19 bidirectional General-purpose PORT pin PC19; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
60 PC20 bidirectional General-purpose PORT pin PC20; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
61 PC21 bidirectional General-purpose PORT pin PC21; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
62 GND power_in Digital ground for the device.
63 VDDIO power_in I/O supply for the PB16 to PB21 and PA20 to PA25 pin cluster, within the 1.71V to 3.63V device operating range.
64 PB16 bidirectional General-purpose PORT pin PB16; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
65 PB17 bidirectional General-purpose PORT pin PB17; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
66 PB18 bidirectional General-purpose PORT pin PB18; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
67 PB19 bidirectional General-purpose PORT pin PB19; its alternate peripheral functions are listed on page 34, which is not in the supplied text.
68 PB20 bidirectional PORT pin PB20 with EIC EXTINT[4], SERCOM3 PAD[0], SERCOM7 PAD[1], TCC1 WO[2], PDEC PDEC[2] and GCLK IO[6].
69 PB21 bidirectional PORT pin PB21 with EIC EXTINT[5], SERCOM3 PAD[1], SERCOM7 PAD[0], TCC1 WO[3] and GCLK IO[7].
70 PA20 bidirectional PORT pin PA20 with EIC EXTINT[4], PTC X14/Y14, SERCOM5 PAD[2], SERCOM3 PAD[2], TCC0 WO[0] and I2S FS[0].
71 PA21 bidirectional PORT pin PA21 with EIC EXTINT[5], PTC X15/Y15, SERCOM5 PAD[3], SERCOM3 PAD[3], TCC0 WO[1] and I2S SDO.
72 PA22 bidirectional High-sink PORT pin PA22 with EIC EXTINT[6], PTC X16/Y16, SERCOM3 PAD[0], SERCOM5 PAD[1], TCC0 WO[2], CAN0 TX and I2S SDI.
73 PA23 bidirectional High-sink PORT pin PA23 with EIC EXTINT[7], PTC X17/Y17, SERCOM3 PAD[1], SERCOM5 PAD[0], TCC0 WO[3], CAN0 RX and I2S FS[1].
74 PA24 bidirectional PORT pin PA24 with EIC EXTINT[8], SERCOM3 PAD[2], SERCOM5 PAD[2], TCC2 WO[2], USB DM and CAN0 TX.
75 PA25 bidirectional PORT pin PA25 with EIC EXTINT[9], SERCOM3 PAD[3], SERCOM5 PAD[3], PDEC PDEC[1], USB DP and CAN0 RX.
76 GND power_in Digital ground for the device.
77 VDDIO power_in I/O supply for the PB22 to PB25 and PC24 to PC28 pin cluster, within the 1.71V to 3.63V device operating range.
78 PB22 bidirectional PORT pin PB22 with EIC EXTINT[6], SERCOM1 PAD[2], SERCOM5 PAD[2], TC7 WO[0], USB SOF 1KHz and XIN of XOSC1.
79 PB23 bidirectional PORT pin PB23 with EIC EXTINT[7], SERCOM1 PAD[3], SERCOM5 PAD[3], TC7 WO[1] and XOUT of XOSC1.
80 PB24 bidirectional PORT pin PB24 with EIC EXTINT[8], SERCOM0 PAD[0], SERCOM2 PAD[1], PDEC PDEC[1] and AC CMP[0].
81 PB25 bidirectional PORT pin PB25 with EIC EXTINT[9], SERCOM0 PAD[1], SERCOM2 PAD[0], PDEC PDEC[2] and AC CMP[1].
82 PC24 bidirectional PORT pin PC24 with EIC EXTINT[8], SERCOM0 PAD[2], SERCOM2 PAD[2] and TRACE DATA[3].
83 PC25 bidirectional PORT pin PC25 with EIC EXTINT[9], SERCOM0 PAD[3], SERCOM2 PAD[3] and TRACE DATA[2].
84 PC26 bidirectional PORT pin PC26 with EIC EXTINT[10] and TRACE DATA[1].
85 PC27 bidirectional PORT pin PC27 with EIC EXTINT[11], SERCOM1 PAD[0], TRACE CLK, CCL IN[4], and acts as SWO in single-wire trace mode.
86 PC28 bidirectional PORT pin PC28 with EIC EXTINT[12], SERCOM1 PAD[1], TRACE DATA[0] and CCL IN[5].
87 PA27 bidirectional PORT pin PA27 with EIC EXTINT[11], PTC X18/Y18 and GCLK IO[1].
88 RESETN input External active-low reset input for the device.
89 VDDCORE power_in Core supply pin for the device, within the 1.71V to 3.63V device operating range.
90 GND power_in Digital ground for the device.
91 VSW power_out Switching node of the embedded buck regulator.
92 VDDIO power_in I/O supply for the PA30 and PA31 pin cluster, within the 1.71V to 3.63V device operating range.
93 PA30 bidirectional PORT pin PA30 with EIC EXTINT[14], SERCOM1 PAD[2], SERCOM7 PAD[2], TC6 WO[0], TCC2 WO[0], SWCLK and CCL IN[3].
94 PA31 bidirectional PORT pin PA31 with EIC EXTINT[15], SERCOM1 PAD[3], SERCOM7 PAD[3], TC6 WO[1], TCC2 WO[1] and SWDIO.
95 PB30 bidirectional PORT pin PB30 with EIC EXTINT[14], SERCOM7 PAD[0], SERCOM5 PAD[1], TC0 WO[0], TCC4 WO[0] and SWO (in non-single-wire trace modes).
96 PB31 bidirectional PORT pin PB31 with EIC EXTINT[15], SERCOM7 PAD[1], SERCOM5 PAD[0], TC0 WO[1], TCC4 WO[1] and TCC0 WO[7].
97 PB00 bidirectional PORT pin PB00 with EIC EXTINT[0], ADC0 AIN[12], PTC X30/Y30, SERCOM5 PAD[2], TC7 WO[0] and CCL IN[1].
98 PB01 bidirectional PORT pin PB01 with EIC EXTINT[1], ADC0 AIN[13], PTC X31/Y31, SERCOM5 PAD[3], TC7 WO[1] and CCL IN[2].
99 PB02 bidirectional PORT pin PB02 with EIC EXTINT[2], ADC0 AIN[14], PTC X20/Y20, SERCOM5 PAD[0], TC6 WO[0], TCC2 WO[2] and CCL OUT[0].
100 PB03 bidirectional PORT pin PB03 with EIC EXTINT[3], PTC X21/Y21, SERCOM5 PAD[1] and TC6 WO[1].

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-100(14x14)
Category Single Chip Microcomputer/Microcontroller
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
VDDIO supply voltage VDDIO 1.71 3.63 V Powers I/O lines, XOSCn and the internal regulator for VDDCORE 46
VDDANA supply voltage VDDANA 1.71 3.63 V Powers I/O lines, the Automatic Power Switch, ADC0/1, AC, DAC and PTC; same voltage as VDDIO 46
VDDIOB supply voltage VDDIOB 1.71 3.63 V Powers I/O B lines; must be equal to or lower than VDDIO 46
VBAT supply voltage VBAT 1.71 3.63 V Powers the Automatic Power Switch 46
Operating temperature (industrial grade U) -40 85 °C 1.71V to 3.63V, -40°C to +85°C, DC to 120 MHz 1
Maximum CPU clock frequency (industrial grade U) 120 MHz 1.71V to 3.63V, -40°C to +85°C, DC to 120 MHz 1
VDDCORE internal regulator output voltage VDDCORE 1.2 V Internal voltage regulator output in linear mode; typical value 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-AU
  • Footprint: Package_QFP:TQFP-100_14x14mm_P0.5mm
  • 3D model: TQFP-100(14x14) (KiCad packages3D, STEP)
  • 3D model files: atsame51n20a-au-etched.step / atsame51n20a-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atsame51n20a-au.step / atsame51n20a-au.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 2026-10-28, 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