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Pretty well all these pins have multiple functions, and you can configure up to 16 of them for PWM. They are laid out pretty-well in order, with a “gap” between GPIO 22 and GPIO 26 (those “missing” pins are used internally). There are 26 exposed GPIO connections on the Raspberry Pi Pico board.

RUN – This line can enable or disable the RP2040 microcontroller, it can also reset it.

3V3_EN – You can use this input to disable the Pico’s internal voltage regulator, which will shut off the Pico and any components powered by it.

There are also a couple of inputs that can allow you to control the power in the Pico. It can be used to power additional components, providing you keep the load under 300ma.

3V3 – This is a 3.3-volt output, from the Pico’s internal regulator.

The on-board voltage converter will change it to 3.3-volts for the Pico.

VSYS – This is the input voltage, which can range from 2 to 5-volts.

If the Pico is not being powered by the microUSB connector then there will be no output here.

VBUS – This is the power from the microUSB bus, 5-volts.

The Pico is a 3.3-volt logic device, however, it can be powered with a range of power supplies thanks to a built-in voltage converter and regulator.Īll of the power-related pins are groped in one section on the board, close to the microUSB connector. One of the ground connections, on pin 33, is also designated the Analog Ground Power Pins These pins are easy to spot, they are evenly spaced and are square as opposed to rounded like the other connections.

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There are several ground connections on the board, eight of them plus an additional one on the 3-pin Debug connector. In the center of the board is the brains of the whole thing, the RP2040 MCU, whose features we’ll examine in a short while.

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The BOOTSEL pushbutton switch is mounted a bit down from the LED, it allows you to change the boot mode of the Pico so that you can load MicroPython onto it and perform drag-and-drop programming.Īt the bottom of the board, you’ll see three connections, these are for a serial Debug option that we won’t be exploring today, but will be of interest to advanced developers. It’s worthwhile to note that this is the only LED on the entire Pico board. This is used for both communications and to supply power to the Pico.Īn on-board LED is mounted next to the microUSB connector, it’s internally connected to GPIO pin 25. The most predominant feature on the board is the microUSB connector at one end. It’s a well-made board that can also be used as an SMD component and soldered directly to a printed circuit board. Unlike the similar-priced Seeeduino XIAO, there are no header pins packaged with the board, so you’ll need to supply them yourself. The Pico board is all you get for your four dollars, not to say that that isn’t a great buy, but if you’re looking for fancy packaging or documentation then look elsewhere. Sort of like packages of snacks or candy that you can buy in bulk. Like all Raspberry Pi products the packaging is pretty minimal, in fact, it’s just a Pico inside a plastic package, which itself was cut off of a strip of packages. The Pico is a tiny board, approximately the same size as an Arduino Nano. In the meantime, let’s see what we can find out about the Pico by hooking a bunch of things up to it! Raspberry Pi Pico

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That should bring us more code and development tools. Undoubtedly that will change soon, especially as Raspberry Pi has licensed other manufacturers, including Adafruit, to use the RP2040 chip in their own designs.

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It’s available in softcover, and as a PDF download as well.īut otherwise, there is not, at the moment, a lot of “real-world” information about the Pico. Raspberry Pi did release a ton of technical documentation, plus a great guide called Get Started with MicroPython on Raspberry Pi Pico. So when it comes to the Pico we are all starting from scratch. Instead of building upon the mountain of existing code and support for ESP32 or SAMD21-based designs they chose to create their own microcontroller. We’ll see what four dollars worth of microcontroller gets you these days! Introductionįor the folks at the Raspberry Pi Foundation to release a microcontroller was in itself a huge announcement, after all the makers of the world’s most popular single-board computer never had expressed an interest in microcontrollers.īut not only did the announcement of the Raspberry Pi Pico come as a surprise, but the fact that it was built around exclusive Raspberry Pi silicon was also even more of a shocker. So let’s get the MicroPython out because today we’ll be programming EVERYTHING on a Raspberry Pi Pico using MicroPython.