⚡ Install this component

Paste this into Claude Code (VS Code panel, Adom editor, or terminal) to install:

Search the Adom Wiki for the library component "SAMD21G18A" (slug: samd21g18a) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/libraries/samd21g18a. Pull down the KiCad symbol, footprint, and 3D model files from the wiki page's assets. Install them into my current KiCad project and register in sym-lib-table and fp-lib-table. If the page has a datasheet URL, save that too.

Manufacturer Microchip

Package TQFP-48

Pins 48 pins (Port A, Port B, System, Power)

Library View

Interactive symbol, footprint, and 3D model — hover pins for cross-highlighting.

SymbolGenerated Generated from pin data (not in KiCad standard library)

FootprintKiCad KiCad standard library: Package_QFP/TQFP-48_7x7mm_P0.5mm

3DGenerated Generated pad visualization (Babylon.js)

Breakout Board

Auto-generated breakout molecule for SAMD21G18A — all pins brought to 2mm-pitch headers with 4 corner machine pins on 8mm grid.

Pricing & Availability

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DigiKey Not available

JLCPCB Not available

Pin Configuration

Port APort BSystemPower

Pin	Name	Group	Function
Port A — PA00-PA31 / ADC / SERCOM
1	PA00	Port A	GPIO / XIN32
2	PA01	Port A	GPIO / XOUT32
3	PA02	Port A	GPIO / AIN0 / DAC_VOUT
4	PA03	Port A	GPIO / AIN1 / VREFA
9	PA04	Port A	GPIO / AIN4 / SERCOM0_PAD0
10	PA05	Port A	GPIO / AIN5 / SERCOM0_PAD1
11	PA06	Port A	GPIO / AIN6 / SERCOM0_PAD2
12	PA07	Port A	GPIO / AIN7 / SERCOM0_PAD3
13	PA08	Port A	GPIO / I2C_SDA / SERCOM0_PAD0
14	PA09	Port A	GPIO / I2C_SCL / SERCOM0_PAD1
15	PA10	Port A	GPIO / AIN18 / SERCOM0_PAD2
16	PA11	Port A	GPIO / AIN19 / SERCOM0_PAD3
21	PA12	Port A	GPIO / SERCOM2_PAD0 / I2C_SDA
22	PA13	Port A	GPIO / SERCOM2_PAD1 / I2C_SCL
23	PA14	Port A	GPIO / XIN / SERCOM2_PAD2
24	PA15	Port A	GPIO / XOUT / SERCOM2_PAD3
25	PA16	Port A	GPIO / SERCOM1_PAD0 / SERCOM3_PAD0
26	PA17	Port A	GPIO / SERCOM1_PAD1 / SERCOM3_PAD1
27	PA18	Port A	GPIO / SERCOM1_PAD2 / SERCOM3_PAD2
28	PA19	Port A	GPIO / SERCOM1_PAD3 / SERCOM3_PAD3
29	PA20	Port A	GPIO / SERCOM3_PAD2 / SERCOM5_PAD2
30	PA21	Port A	GPIO / SERCOM3_PAD3 / SERCOM5_PAD3
31	PA22	Port A	GPIO / SERCOM3_PAD0 / SERCOM5_PAD0
32	PA23	Port A	GPIO / SERCOM3_PAD1 / SERCOM5_PAD1 / USB_SOF
33	PA24	Port A	GPIO / USB_DM
34	PA25	Port A	GPIO / USB_DP
39	PA27	Port A	GPIO
41	PA28	Port A	GPIO
45	PA30	Port A	GPIO / SWCLK / SERCOM1_PAD2
46	PA31	Port A	GPIO / SWDIO / SERCOM1_PAD3
Port B — PB00-PB11
7	PB08	Port B	GPIO / AIN2 / SERCOM4_PAD0
8	PB09	Port B	GPIO / AIN3 / SERCOM4_PAD1
19	PB10	Port B	GPIO / SERCOM4_PAD2
20	PB11	Port B	GPIO / SERCOM4_PAD3
37	PB22	Port B	GPIO / SERCOM5_PAD2
38	PB23	Port B	GPIO / SERCOM5_PAD3
47	PB02	Port B	GPIO / AIN10 / SERCOM5_PAD0
48	PB03	Port B	GPIO / AIN11 / SERCOM5_PAD1
System — Reset, crystal, SWD
17	VDDIO	System	I/O supply voltage
36	VDDIO	System	I/O supply voltage
40	RESETN	System	Reset, active low
Power — Supply and ground
5	GNDANA	Power	Analog ground
6	VDDANA	Power	Analog supply
18	GND	Power	Ground
35	GND	Power	Ground
42	GND	Power	Ground
43	VDDCORE	Power	Core supply voltage
44	VDDIN	Power	Regulator input supply

AI Skill Technical Reference

Edit AI Skill

SAMD21G18A — ARM Cortex-M0+ MCU, 48MHz, 256KB Flash, TQFP-48

Manufacturer: Microchip Package: TQFP-48

Description

The SAMD21G18A is a low-power ARM Cortex-M0+ MCU from Microchip. It runs at 48MHz with 256KB Flash and 32KB SRAM. Used in Arduino Zero, Adafruit Feather M0, and many maker boards.

Pin Configuration

Package: TQFP-48

Pin 1: PA00 — GPIO / XIN32
Pin 2: PA01 — GPIO / XOUT32
Pin 3: PA02 — GPIO / AIN0 / DAC_VOUT
Pin 4: PA03 — GPIO / AIN1 / VREFA
Pin 5: GNDANA — Analog ground
Pin 6: VDDANA — Analog supply
Pin 7: PB08 — GPIO / AIN2 / SERCOM4_PAD0
Pin 8: PB09 — GPIO / AIN3 / SERCOM4_PAD1
Pin 9: PA04 — GPIO / AIN4 / SERCOM0_PAD0
Pin 10: PA05 — GPIO / AIN5 / SERCOM0_PAD1
Pin 11: PA06 — GPIO / AIN6 / SERCOM0_PAD2
Pin 12: PA07 — GPIO / AIN7 / SERCOM0_PAD3
Pin 13: PA08 — GPIO / I2C_SDA / SERCOM0_PAD0
Pin 14: PA09 — GPIO / I2C_SCL / SERCOM0_PAD1
Pin 15: PA10 — GPIO / AIN18 / SERCOM0_PAD2
Pin 16: PA11 — GPIO / AIN19 / SERCOM0_PAD3
Pin 17: VDDIO — I/O supply voltage
Pin 18: GND — Ground
Pin 19: PB10 — GPIO / SERCOM4_PAD2
Pin 20: PB11 — GPIO / SERCOM4_PAD3
Pin 21: PA12 — GPIO / SERCOM2_PAD0 / I2C_SDA
Pin 22: PA13 — GPIO / SERCOM2_PAD1 / I2C_SCL
Pin 23: PA14 — GPIO / XIN / SERCOM2_PAD2
Pin 24: PA15 — GPIO / XOUT / SERCOM2_PAD3
Pin 25: PA16 — GPIO / SERCOM1_PAD0 / SERCOM3_PAD0
Pin 26: PA17 — GPIO / SERCOM1_PAD1 / SERCOM3_PAD1
Pin 27: PA18 — GPIO / SERCOM1_PAD2 / SERCOM3_PAD2
Pin 28: PA19 — GPIO / SERCOM1_PAD3 / SERCOM3_PAD3
Pin 29: PA20 — GPIO / SERCOM3_PAD2 / SERCOM5_PAD2
Pin 30: PA21 — GPIO / SERCOM3_PAD3 / SERCOM5_PAD3
Pin 31: PA22 — GPIO / SERCOM3_PAD0 / SERCOM5_PAD0
Pin 32: PA23 — GPIO / SERCOM3_PAD1 / SERCOM5_PAD1 / USB_SOF
Pin 33: PA24 — GPIO / USB_DM
Pin 34: PA25 — GPIO / USB_DP
Pin 35: GND — Ground
Pin 36: VDDIO — I/O supply voltage
Pin 37: PB22 — GPIO / SERCOM5_PAD2
Pin 38: PB23 — GPIO / SERCOM5_PAD3
Pin 39: PA27 — GPIO
Pin 40: RESETN — Reset, active low
Pin 41: PA28 — GPIO
Pin 42: GND — Ground
Pin 43: VDDCORE — Core supply voltage
Pin 44: VDDIN — Regulator input supply
Pin 45: PA30 — GPIO / SWCLK / SERCOM1_PAD2
Pin 46: PA31 — GPIO / SWDIO / SERCOM1_PAD3
Pin 47: PB02 — GPIO / AIN10 / SERCOM5_PAD0
Pin 48: PB03 — GPIO / AIN11 / SERCOM5_PAD1

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0 revisions · Updated 2026-03-02 17:31:36