3.9 Programming

Unified Program and Debug Interface (UPDI) is a Microchip proprietary interface for external programming and on-chip debugging.

Figure 3-15. UPDI Programming Interface

The pin definition is shown in the table below.

Table 3-8. UPDI Interface Pin Map
Net NamePin in MCU
UPDI_RESET_PA0PA0

The interface supports single-wire programming. For a detailed description, refer to the UPDI section of the latest ATtiny817 data sheet.