What is it?

Due to component shortages, quantities of this item are limited.

This programmer is an ATTiny UPDI standalone programmer, no PC connection necessary. It will recover the fuses to factory defaults even if you programmed the UPDI pin as a GPIO. Similar to my other programmer here, this one will only program the ATtiny devices.

This programmer must power your target and will run only at 5V.

The programmer will inject a 12 Volt pulse to the UPDI pin in order to re-enable the UPDI function. Next, it will reprogram the fuses to factory defaults. Only devices in the device list below are supported.

Why did you make it?

I was looking for an easier way (as always) to recover from a catastrophic fuse programming mishap without having to spend hundreds of dollars!

What makes it special?

Its Easy! Watch the video. In one second you will recover your device. With chip shortages these days, it may be impossible to replace the chip if you accidentally disable the UPDI interface. With this programmer you can recover all of your bricked chips in just a few minutes. The programmer pays for itself in just a few uses. If you want to read the code from a device where the UPDI pin has been disabled, install J1 jumper to skip the erase operation. (If the lock bits are programmed, this will not work and the erase operation must be enabled). Once restored, you can now read the code with your UPDI programmer.

There are four ERROR codes that the programmer produces from the LED's when the programming session is complete.

1. Yellow LED flashes 2 times, Chip is locked. This error only occurs if you installed J1 jumper and the chip is locked.

2. Yellow LED flashes 3 times, there is a UPDI Communication error. You have not connected the wires correctly, or there is no device present or your device is irreparable.

3. Yellow LED flashes 4 times, you are trying to program a device that is not supported. Please read the device list below.

4. Yellow LED ON (no flashing), the fuses did not verify after programming.

5. Green LED on, (no flashing). Success! you recovered your device!

Device List For the UPDI ATTiny Standalone Fuse Restore Programmer