Unified Program and Debug Interface (UPDI) is a Microchip proprietary interface for external programming and on-chip debugging.
Figure 1. UPDI Programming Interface
The pin definition is shown in the table below.
| Net Name | Pin in MCU |
|---|---|
| UPDI_RESET_PA0 | PA0 |
The interface supports single-wire programming. For a detailed description, refer to the UPDI section of the latest ATtiny817 data sheet.