SKU: 60652022220

SparkFun SAMD21 Mini Breakout ARM, Boards, Sparkfun Originals

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Description

SparkFun SAMD21 Mini Breakout ARM, Boards, Sparkfun OriginalsIf you? re ready to step your Arduino game up from older 8 bit 16MHz microcontrollers, the SparkFun SAMD21 Mini Breakout is a great landing spot. The SAMD21 Mini Breakout is a Pro Mini sized breakout for the Atmel ATSAMD21G18, a 32 bit ARM Cortex M0+ processor with 256KB flash, 32KB SRAM, and an operating speed of up to 48MHz. This mini breakout provides you with an Arduino hardware option that solves the problems of low storage limits and dynamic

If you?re ready to step your Arduino game up from older 8-bit/16MHz microcontrollers, the SparkFun SAMD21 Mini Breakout is a great landing spot. The SAMD21 Mini Breakout is a Pro Mini-sized breakout for the Atmel ATSAMD21G18, a 32-bit ARM Cortex-M0+ processor with 256KB flash, 32KB SRAM, and an operating speed of up to 48MHz. This mini breakout provides you with an Arduino hardware option that solves the problems of low storage limits and dynamic memory stack overflows that have plagued the previous iterations of the Arduino family. Yes, the SparkFun SAMD21 Mini Breakout is even fully supported in the Arduino IDE and libraries for the Arduino Zero!

The SparkFun SAMD21 Mini Breakout has been equipped with a USB interface for programming and power, surrounded with an RTC crystal, and a 600mA 3.3V regulator. By utilizing the Pro R3?s extra PCB real-estate we’ve been able to leave room for a few extra GPIO pins. We?ve pinned the Mini Breakout to match ? as much as possible ? our faithful Pro Mini and Pro Micro. The I/O and voltage rails are all broken out to a pair of breadboard-compatible headers. Power can be supplied, and the board can be programmed, through the micro-B USB connector.

One of the most unique features of the SAMD21 is SERCOM ? a set of six configurable serial interfaces that can be turned into either a UART, I2C master, I2C slave, SPI master, or SPI slave. Each SERCOM provides for a lot of flexibility: the ports can be multiplexed, giving you a choice of which task each pin is assigned.

The on-line SAMD21 Mini/Dev Breakout Hookup Guide (in the Documents section below) contains step by step instructions of how to connect your SparkFun SAMD21 Mini Breakout as well as a few circuit examples to test out. Full example code is provided and explained and even includes troubleshooting tips to make make you have zero problems.

Note: The breakout does NOT have headers installed and will need to purchased and soldered on yourself. Check the Recommended Products section below for the type of headers we use in the Hookup Guide!

Features:

  • ATSAMD21G18 32-bit/48MHz ARM Cortex-M0+
  • 256KB Flash Memory
  • 32KB SRAM
  • 32KB of EEPROM (emulated in Flash)
  • 22 GPIO Count
  • 14 ADC Channels at 12-bit Resolution
  • Analog-to-Digital and Digital-to-Analog Converters (ADC & DAC)
  • RAW: 3.5V-6.0V
  • VCC: 600mA @3.3V
  • Pro Mini/Micro Layout
  • Integrated USB Controller

Documents:

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SKU: 60652022220

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4.7 ★★★★★
Based on 7 reviews
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A
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Alec Rusnack
Lake Worth, US
★★★★★ 5
Excellent shirt for the $.
So far, great shirt for the $. Washed twice. No shrinkage. Few wrinkles when hung to dry. 3 minutes in the dryer solved that. I wear it for golf. Moisture wicking is great on very hot day. Was concerned the length might be too short because I wear tucked in for golf. No problems. Fit is excellent, cut on the slimmer side. I’m 5’’ 11” with a 33 waist and 41 inch chest, weigh 168. it was excellent not baggy. Not tight. I read it ran small or tight for a medium and several reviews advised to go up a size. I order the large first time and although ok, it was a bit too loose in the waist and chest and shoulder seams rode an inch or so down. I returned for the medium and perfect fit. I like collar, it’s creased firmly at the seam and won’t roll. Overall, a great value and I ordered again in green. Out of stock for other colors or would have ordered more. Long years wear is a question. We’ll see.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 16, 2020
M
Verified Purchase
mchase
Chelsea, US
★★★★★ 5
Excellent basic polo shirt
Size: X-Large, Color: Olive
Excellent basic polo short-sleeve shirt for business and work. I appreciate the many different colors Amazon provides for this type of shirt online. It also saved me a special trip to the department store. Needed an extra polo shirt right away.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
B
Verified Purchase
bidesed
Omaha, US
★★★★★ 5
Awesome deal for a versatile shirt!
Size: Large, Color: Black, Size: Large, Color: Black
Great fit, looks and quality for the price. I originally bought two different colors to see how they looked. After receiving them, I will buy more. They are so versatile. I’ve worn them with khakis, jeans, or shorts. Great deal!!!
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Reviewed in the United States on June 8, 2026
N
Verified Purchase
Nicholas Parker
Cuba, US
★★★★★ 4
Seems like a good shirt but the large is more like an XL and it it's cut big
Size: Large, Color: Black, Size: Large, Color: Black
Off the bat, here are two photos of this shirt to help you out: (1) My arms are up and it shows you how big the Large version of this polo is. There is room to spare and plenty of sleeve length. (2) I am holding up one side of the shirt at belt level to show you how long the Large version of this polo is. The photo of the GREEN shirt is NOT THE SHIRT ON THIS PAGE. The green shirt is the slim-fit version. It's a perfectly good shirt. The problem is that the sizing is unlike any polo I have. I'm 6' 175 lbs, I would say my body type is over on the thin side. I usually buy size Large shirts. When I put this size Large shirt on, it was much bigger than I expected. I admit, I have been wearing Gap polos for a long time and a few years ago, they went through this process of progressively cutting their polos more and more narrow. At this point, I consider Gap’s polo a fitted polo, and it’s their only polo. In other words, I have only been wearing fitted polo shirts for a long time. I thought I would switch to a more standard polo, save a little money, and buy some of these Amazon shirts. Same size I buy in all casual shirts. Large. I was expecting a looser fit but, to me, this Large was more like an Extra Large. Much bigger than any Large shirt I had worn in a long time (maybe ever?). I can't suggest one buy a medium to compensate because I haven't tried one. I also can't say if washing it would shrink it enough. Maybe if I washed it in scalding hot water and ran it through a dryer on the "surface of the sun" setting, it might shrink enough. I’m going to opt for returning them. Don’t forget to take note of the length of the shirt. It’s long. My Gap polos land a couple of inches below the waistline. These shirts fall much further down (see photo). This is actually great if you tuck it in but not if you don't Bottom line – it strikes me as a good shirt. You just need to know these are big shirts. I’m going to give the slim-fit version a shot. *UPDATE* The slim-fit version is a MUCH better fit for me. It's almost, but not quite, too tightly cut. It is a looser fit than the 2018 Gap polo. It does shrink a bit in the wash. I've added a photo of me in a slim-fit green shirt. Also much shorter in length.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2019
M
Verified Purchase
Mark M. Troy, MI
Omaha, US
★★★★★ 5
Excellent value, consistent fit, cool, comfortable and durable.
Size: Large, Color: Army Green
I have purchased 20 plus of these shirts in the past six months. The first batch in spring, figuring if any inconsistencies or quality issues arose upon delivery, no problem. Amazon's return policy has always been hassle free. After trying on the fourth shirt and noticing no outstanding flaws or differences, all were simply opened, laundered and hung on a hanger. The material is 100 percent cotton, but assuming they are removed from the dryer immediately (medium heat) - no ironing necessary. No appreciable shrinking is observed and no outliers in the batch. My sport shirt size is men's US large regular fit. Other relevant sizes - 17.5 inch neck, 46 inch shoulders, 34 inch sleeves and 36 inch waist. Overall fit of these shirts is of appropriate roominess without bagginess. Shirt tail length is spot on, work dress code requires tucked in, and they stay tucked in. Casual requires not tucked in, and unless I am reaching for the sky with both hands while on tip toes, the shirt tail/ belt line is not breached. The sleeve length could have been extended by an inch since they taper to an elastic cuff, requiring that the sleeves are pulled back to original position following an extended reach. But given the choice, the sleeves as is are preferred over a straight cut without the elastic cuff. As an upgrade to the T shirt appearance of the shirt tail when not tucked in, the side seams end with a reinforced, one inch inverted V, a feature not typical in this price range. To date, durability has not been an issue. Fraying, fabric pilling and fading have not occurred. It is quite difficult, if not impossible, to differentiate the age of two duplicate color shirts purchased in two separate batches. Again, excellent value, consistent fit, cool, comfortable and durable!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2017

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