It's not responding to the programmer at all in avr studio.

avrisp     attiny44
mosi  -- - mosi
miso  ---- miso
sck   ---- usck
reset ----  reset

Or can it not be programmed by an mk2? I assumed all chips can be programmed by it

  • \$\begingroup\$ Did you connect the two grounds together also? \$\endgroup\$ Mar 26, 2011 at 20:36

1 Answer 1


The AVRISP mkII can program the tiny44 in the latest version of AVR Studio (4.18 SP3 or 5 beta). Make sure your version is either up-to-date or check the help files/release notes that came with it to verify. Also allow AVR Studio to update the firmware in your AVRISP mkII if it needs to.

Verify the following conditions:

  • Programmer is connected to PCB (GND, RESET, MOSI, MISO, and SCK)
  • Target is powered.
    • Not sure how much power the AVRISP MKII can provide, but don't rely on it if your board takes more than 50 mA.
    • You do not need to connect the programmer's VCC line to the chip power if you provide it externally.
  • MOSI, MISO, SCK have pullups to GND/VCC no stronger than 820 Ω.
  • RESET pullup should be no stronger than 4.7 kΩ and have a decoupling capacitor less than 10 µF.

Follow the troubleshooting guide in the AVRISP mkII user guide [PDF] if you experience problems as a first step:

enter image description here

  • 1
    \$\begingroup\$ I was told the vcc and gnd is used as detecting the logic level am using. It doesn't provide power. is that not true \$\endgroup\$
    – Ageis
    Mar 27, 2011 at 14:05

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