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ATSAML21G17B-AUT
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-48(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
markdownATSAML21G17B-AUT
Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-48(7x7)
ATSAML21G17B-AUT from Microchip Tech, in a TQFP-48(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 | Port A GPIO pin PA00, a Backup pin powered from VSWOUT; it can also serve as XIN32 (32 kHz crystal input), EXTINT[0]/EXTWAKE[0] and SERCOM1 PAD[0]. |
| 2 | PA01 | bidirectional | Port A GPIO pin PA01, a Backup pin powered from VSWOUT; it can also serve as XOUT32 (32 kHz crystal output), EXTINT[1]/EXTWAKE[1] and SERCOM1 PAD[1]. |
| 3 | PA02 | bidirectional | Port A GPIO pin PA02, powered from VDDANA; alternate analog functions include AIN[0], Y[0], VOUT[0] and OA_NEG[0], and it is a static neighbour pin for XOSC32K jitter minimization. |
| 4 | PA03 | bidirectional | Port A GPIO pin PA03, powered from VDDANA; alternate analog functions include VREFA, AIN[1] and Y[1], and it is a static neighbour pin for XOSC32K jitter minimization. |
| 5 | GNDANA | power_in | Ground for the analog power domain. |
| 6 | VDDANA | power_in | Analog supply voltage, 1.6 V to 3.6 V, decoupled with 100 nF and 10 µF capacitors and recommended to be filtered from VDD with a ferrite bead. |
| 7 | PB08 | bidirectional | Port B GPIO pin PB08, powered from VDDANA; alternate functions include AIN[2], OA_OUT[1], SERCOM4 PAD[0] and TC0/WO[0]. |
| 8 | PB09 | bidirectional | Port B GPIO pin PB09, powered from VDDANA; alternate functions include AIN[3], Y[15], OA_POS[1], SERCOM4 PAD[1] and TC0/WO[1]. |
| 9 | PA04 | bidirectional | Port A GPIO pin PA04, powered from VDDANA; alternate functions include VREFB, AIN[4], AIN[0], OA_OUT[2], SERCOM0 PAD[0] and TCC0/WO[0]. |
| 10 | PA05 | bidirectional | Port A GPIO pin PA05, powered from VDDANA; alternate functions include AIN[5], AIN[1], VOUT[1], OA_POS[2], SERCOM0 PAD[1] and TCC0/WO[1]. |
| 11 | PA06 | bidirectional | Port A GPIO pin PA06, powered from VDDANA; alternate functions include AIN[6], AIN[2], Y[4], OA_POS[0], SERCOM0 PAD[2] and TCC1/WO[0]. |
| 12 | PA07 | bidirectional | Port A GPIO pin PA07, powered from VDDANA; alternate functions include AIN[7], AIN[3], OA_OUT[0], SERCOM0 PAD[3] and TCC1/WO[1]. |
| 13 | PA08 | bidirectional | Port A GPIO pin PA08, powered from VDDIO; it is a High Sink pin and supports SERCOM I2C, with alternate functions including NMI, AIN[16], X[0], Y[6] and TCC0/WO[0]. |
| 14 | PA09 | bidirectional | Port A GPIO pin PA09, powered from VDDIO; it is a High Sink pin and supports SERCOM I2C, with alternate functions including EXTINT[9], AIN[17], X[1], Y[7] and TCC0/WO[1]. |
| 15 | PA10 | bidirectional | Port A GPIO pin PA10, powered from VDDIO; alternate functions include EXTINT[10], AIN[18], X[2], Y[8], SERCOM0 PAD[2] and GCLK_IO[4]. |
| 16 | PA11 | bidirectional | Port A GPIO pin PA11, powered from VDDIO; alternate functions include EXTINT[11], AIN[19], X[3], Y[9], SERCOM0 PAD[3] and GCLK_IO[5]. |
| 17 | VDDIO | power_in | Digital I/O supply voltage, 1.6 V to 3.6 V, decoupled with 100 nF and 10 µF capacitors. |
| 18 | GND | power_in | Digital ground. |
| 19 | PB10 | bidirectional | Port B GPIO pin PB10, powered from VDDIO; alternate functions include EXTINT[10], Y[2], SERCOM4 PAD[2], TC1/WO[0] and GCLK_IO[4]. |
| 20 | PB11 | bidirectional | Port B GPIO pin PB11, powered from VDDIO; alternate functions include EXTINT[11], Y[3], SERCOM4 PAD[3], TC1/WO[1] and GCLK_IO[5]. |
| 21 | PA12 | bidirectional | Port A GPIO pin PA12, powered from VDDIO; alternate functions include EXTINT[12], SERCOM2 PAD[0], SERCOM4 PAD[0], TCC2/WO[0] and AC/CMP[0], and it supports SERCOM I2C with output low-level current limited to 2.5 mA in Sm/Fm mode at VOL = 0.4 V. |
| 22 | PA13 | bidirectional | Port A GPIO pin PA13, powered from VDDIO; alternate functions include EXTINT[13], SERCOM2 PAD[1], SERCOM4 PAD[1], TCC2/WO[1] and AC/CMP[1], and it supports SERCOM I2C with output low-level current limited to 2.5 mA in Sm/Fm mode at VOL = 0.4 V. |
| 23 | PA14 | bidirectional | Port A GPIO pin PA14, powered from VDDIO; it can serve as XIN (external crystal or clock input for the main oscillator) and also as EXTINT[14], SERCOM2 PAD[2], SERCOM4 PAD[2], TC4/WO[0] and GCLK_IO[0]. |
| 24 | PA15 | bidirectional | Port A GPIO pin PA15, powered from VDDIO; it can serve as XOUT (crystal output of the main oscillator) and also as EXTINT[15], SERCOM2 PAD[3], SERCOM4 PAD[3], TC4/WO[1] and GCLK_IO[1]. |
| 25 | PA16 | bidirectional | Port A GPIO pin PA16, powered from VDDIO; alternate functions include EXTINT[0], X[4], SERCOM1 PAD[0], SERCOM3 PAD[0], TCC2/WO[0] and GCLK_IO[2], and it supports SERCOM I2C. |
| 26 | PA17 | bidirectional | Port A GPIO pin PA17, powered from VDDIO; it is a High Sink pin and supports SERCOM I2C, with alternate functions including EXTINT[1], X[5], SERCOM1 PAD[1], SERCOM3 PAD[1] and GCLK_IO[3]. |
| 27 | PA18 | bidirectional | Port A GPIO pin PA18, powered from VDDIO; alternate functions include EXTINT[2], X[6], SERCOM1 PAD[2], SERCOM3 PAD[2], TC4/WO[0] and AC/CMP[0]. |
| 28 | PA19 | bidirectional | Port A GPIO pin PA19, powered from VDDIO; alternate functions include EXTINT[3], X[7], SERCOM1 PAD[3], SERCOM3 PAD[3], TC4/WO[1] and AC/CMP[1]. |
| 29 | PA20 | bidirectional | Port A GPIO pin PA20, powered from VDDIO; alternate functions include EXTINT[4], X[8], SERCOM5 PAD[2], SERCOM3 PAD[2], TC3/WO[0] and GCLK_IO[4]. |
| 30 | PA21 | bidirectional | Port A GPIO pin PA21, powered from VDDIO; alternate functions include EXTINT[5], X[9], SERCOM5 PAD[3], SERCOM3 PAD[3], TC3/WO[1] and GCLK_IO[5]. |
| 31 | PA22 | bidirectional | Port A GPIO pin PA22, powered from VDDIO; it is a High Sink pin and supports SERCOM I2C, with alternate functions including EXTINT[6], X[10], SERCOM3 PAD[0], SERCOM5 PAD[0] and TC0/WO[0]. |
| 32 | PA23 | bidirectional | Port A GPIO pin PA23, powered from VDDIO; it is a High Sink pin and supports SERCOM I2C, with alternate functions including EXTINT[7], X[11], SERCOM3 PAD[1], SERCOM5 PAD[1], USB SOF 1 kHz and GCLK_IO[7]. |
| 33 | PA24 | bidirectional | Port A GPIO pin PA24, powered from VDDIO; alternate functions include EXTINT[12], SERCOM3 PAD[2], SERCOM5 PAD[2], TC1/WO[0], TCC1/WO[2] and USB DM; its internal pull resistor is 50 to 150 kΩ. |
| 34 | PA25 | bidirectional | Port A GPIO pin PA25, powered from VDDIO; alternate functions include EXTINT[13], SERCOM3 PAD[3], SERCOM5 PAD[3], TC1/WO[1], TCC1/WO[3] and USB DP; its internal pull resistor is 50 to 150 kΩ. |
| 35 | GND | power_in | Digital ground. |
| 36 | VDDIO | power_in | Digital I/O supply voltage, 1.6 V to 3.6 V, decoupled with 100 nF and 10 µF capacitors. |
| 37 | PB22 | bidirectional | Port B GPIO pin PB22, powered from VDDIN; alternate functions include EXTINT[6], SERCOM5 PAD[2], TC3/WO[0], GCLK_IO[0] and CCL0 IN[0]. |
| 38 | PB23 | bidirectional | Port B GPIO pin PB23, powered from VDDIN; alternate functions include EXTINT[7], SERCOM5 PAD[3], TC3/WO[1], GCLK_IO[1] and CCL0 OUT. |
| 39 | PA27 | bidirectional | Port A GPIO pin PA27, powered from VDDIN; it is a High Sink pin with alternate functions including EXTINT[15] and GCLK_IO[0]. |
| 40 | RESET | input | External reset input (active low) with an internal pull-up resistor; the low-level threshold is below 0.33×VDDIO for VDDIO 1.6-2.0 V and below 0.36×VDDIO for VDDIO 2.7-3.6 V. |
| 41 | VSW | power_out | On-chip switching-mode regulator output, connected to VDDCORE through a 10 µH inductor with saturation current above 150 mA and DCR below 1 Ω; not connected in linear regulator mode. |
| 42 | GND | power_in | Digital ground. |
| 43 | VDDCORE | power_in | Core supply, 0.9 V to 1.2 V typical; it is the core voltage output with a 1 µF decoupling capacitor in linear regulator mode, and the core supply input connected to VSW through the inductor in switched regulator mode. |
| 44 | VDDIN | power_in | Input supply for the regulator and the VDDIN-powered I/O domain, 1.6 V to 3.6 V, decoupled with 100 nF and 10 µF capacitors. |
| 45 | PA30 | bidirectional | Port A GPIO pin PA30, powered from VDDIN; it carries the SWCLK debug clock input (active when the debugger is connected, with a 1 kΩ pull-up recommended) and also EXTINT[10], SERCOM1 PAD[2], TCC1/WO[0] and GCLK_IO[0]. |
| 46 | PA31 | bidirectional | Port A GPIO pin PA31, powered from VDDIN; it carries the SWDIO debug data pin (activated when a debugger is present) and is a High Sink pin with alternate functions including EXTINT[11], SERCOM1 PAD[3] and TCC1/WO[1]. |
| 47 | PB02 | bidirectional | Port B GPIO pin PB02, a Backup pin powered from VSWOUT; alternate functions include EXTINT[2], AIN[10], SERCOM5 PAD[0], TC2/WO[0] and CCL0 OUT, and it is the SUPC OUT[1] function. |
| 48 | PB03 | bidirectional | Port B GPIO pin PB03, a Backup pin powered from VSWOUT; alternate functions include EXTINT[3], AIN[11], SERCOM5 PAD[1] and TC2/WO[1], and it is the VBAT (external battery supply) input when used by the Supply Controller. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-48(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 48 |
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 temperature range (ordering code -AUT, TQFP48) | -40 | 85 | °C | Ordering code ATSAML21G17B-AUT (Tape & Reel), -40°C to 85°C grade | 17 | ||
| Supply voltage range (main supply / IOs supply, power supply connection figures) | 1.62 | 3.63 | V | Figure 9-1 power supply connection (linear mode); same range annotated in Figures 9-2 and 9-3 on pages 38-39 | 38 | ||
| Maximum CPU frequency | fCPU | 48 | MHz | Configuration summary for SAM L21 family (G variant listed); no separate condition printed | 16 |
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 | indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor. | 1034 |
CAD (KiCad official)
- Symbol:
ATSAML21G17B-AUT - Footprint:
Package_QFP:TQFP-48_7x7mm_P0.5mm - 3D model: TQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files:
atsaml21g17b-aut-etched.step/atsaml21g17b-aut-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atsaml21g17b-aut.step/atsaml21g17b-aut.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (1158 pp, sha256
c7ade1efde79dc98, 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).