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

Dual-Mode High-Voltage UPDI Standalone Fuse Restore Programmer for Microchip Devices

Recover Microchip UPDI devices without a PC. This standalone programmer restores the factory fuse settings even if the UPDI pin has been reconfigured as a GPIO.

The programmer powers the target device and operates exclusively from a 5 V supply.

Features

• No PC connection required
• Restores factory fuse settings
• High-voltage (12 V) UPDI recovery
• Supports both 3-wire and 4-wire programming modes
• Includes connection cable
• Simple jumper selection for operating mode

How It Works

The programmer applies a 12 V recovery pulse to re-enable the UPDI interface. It then programs the device's fuses back to their factory default values, allowing normal UPDI communication to be restored.

Only the devices listed below are supported.

Connection

3-Wire Mode

Connect: VCC GND UPDI

4-Wire Mode

Connect: VCC GND UPDI RESET

Switch between modes using J2:

J2 Installed: 4-wire mode J2 Removed: 3-wire mode A programming cable is included.

Device Recovery

It's simple—just watch the video

Most devices can be recovered in about one second.

If the UPDI interface has been accidentally disabled, this programmer can restore the device instead of requiring a replacement. With component availability often limited, recovering an existing device can save both time and cost.

To preserve the program memory on supported ATtiny devices, install jumper J1 to skip the chip erase operation.

Important: If the device lock bits are programmed, recovery without an erase is not possible. In this case, the erase operation must be enabled.

Once the fuses have been restored, the device can again be accessed using any standard UPDI programmer.

LED Status Codes

Success Green LED ON (steady) The device was successfully recovered.

Error Codes

Yellow LED flashes twice The device is locked. This occurs only when J1 is installed to skip the erase operation.

Yellow LED flashes three times UPDI communication error. Verify the wiring, ensure a supported device is connected, and confirm the device is recoverable.

Yellow LED flashes four times The connected device is not supported.

Yellow LED ON (steady) Fuse verification failed after programming.

Technical Support

Every programmer includes email support. I designed this programmer myself. I am the original developer, not a reseller. If you have questions or encounter a device that won't program, I'll work with you to determine the cause and help you get it working.

You can contact me through messaging here or by using the email address provided in the user guide. I typically respond quickly and will do my best to help you successfully recover your device.

Device List For the Dual Mode UPDI Standalone Fuse Restore Programmer

All International Orders will be shipped on Fridays as long as the order is received by Friday at 9 AM Eastern time.

All sales final. No refunds.