Retired Product

This product has been retired from our catalog and is no longer for sale. This page is made available for those looking for datasheets and the simply curious.

Creative Commons images are CC BY 2.0

Description: The PICAXE X2 microcontrollers are the second generation of PICAXE chips; providing more features and greater flexibility. With the PICAXE 40x2, you get four times the memory and a number of additional input and output pins, when compared to the 40x1.

PICAXE is a neat entry-level microcontroller system that is relatively cheap to get started with. The chip is programmed with a simple serial connection and the BASIC development environment is free! PICAXE has some excellent educational applications and support, and is a great entryway into more complicated embedded systems. If you’re look for a place to start with microcontrollers, PICAXE is a great way to go!


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Customer Comments

  • hey that photo is a Microchip MCU, not a PICAXE !

    • The PICAXE system is a interpreter on top of a picMicro.

      • this chip works at 64 MHz. I have never seen a microchip 8-bit pic running at 64MHz. wtf?

        • I have a PIC18F45K20 running at 64 mhz, with 33pf load caps. You have to use an external crystal to achieve speeds that high.

  • Hey, a PICAXE is a PIC MCU! All the ones I have have the PIC mask.

  • Whaaat? Why are these retired now?? That’s dissapointing, I had planned on buying some extras for various projects but didn’t have the cash at the time. Oh well, 40x1 it is. For the time being anyway.

    • I just saw this, too. This sucks! I’ll need a couple in the not-too-distant future for a project of mine, and now I don’t know where I’ll get them :(

      Bring this back, please!

      • I have been trying to figure out if it’s being superseded by a new version or if Sparkfun just didn’t see the demand for them. So far it just seems like Sparkfun just didn’t see the demand for them which is definitely a bummer. I had just used the 40x2 for the first time to address and read data from gameboy carts. It made it so insanely easy with it being in basic and all the simple ways to manipulate bytes and bits. It’s just a great universal chip that’s easy to use.

  • Some clarity & questions about this MCU.

    • Yes this is the PICAXE 40X2 which is the Microchip PIC18F45K22 with PICaxe bootloader.
    • This version is the Universal Voltage Range (2.1V - 5.5V) operating range.
    • Internal frequency is set to 8 MHz (default), can be set to 16 MHz max via setfreq command.
    • External frequency can be set to 64 MHz (MAX) via crystal and capacitors on pins 13 & 14 labelled ‘Resonator’.

    • There are two ‘V+’ pins. Do they both get connected to Vcc? If so does Vcc need to be divided into the two pins, or is only one required? E.g: 5V divided to 2.5V for pins 11 & 32 or 5V in either pin 11 or 32.

    • The same question with respect to ground (0V) on pins 12 & 31.
    • When using X/X1 code it is possible to convert via Wizard in linAXEpad/Programming Editor. However, there appears no mention if X2 code can be backwards compatible on X/X1 chips. Is X2 code auto-corrected for X/X1 chips?
  • for some size comparison, it’s both longer and wider than the 4 digit 7 segment dislpay

  • Can this be physically oberclocked? Aka.. a new resonator? I think that could be kind of fun to do…:D

    • Yes, a 16Mhz resonator will get it working at 64Mhz but I think people have used bigger and generated a lot of heat in the process

      • A 16MHz res will not get this thing running 64MHz; you have to buy an external 64MHz crystal and add the load caps. I run a PIC18F45K20 with the above, 33pf load caps to be exact, and I run around 63MHz on my scope.

        • It will, the PICAXE has an internal 4x PLL meaning a 4Mhz resonator will get you to 16Mhz and an 8Mhz resonator will get you to 32Mhz.

          Have a look at Manual 2 pg221 on setfreq. Remember that the PICAXE is a PIC18F45K22 :)

  • is this the 3.3v, 5v or universal voltage version?
    (edit) just got one and searcher the part no. it is the unviersal voltage version i.e. 1.8-5.5V

  • I ordered this one and i can say it’s huge! Is Sparkfun going to have surface-mount versions? That would be much better than ordering them from the UK.

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