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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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Comments 13 comments

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

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

  • 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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