4 Hardware Guidelines

This section contains guidelines for designing or reviewing electrical schematics using AVR 8-bit microcontrollers. The information presented here is a brief overview of the most common topics. More detailed information can be found in application notes, listed in this section where applicable.

This section covers the following topics:

General guidelines
Connection for power supply
Connection for RESET
Connection for UPDI (Unified Program and Debug Interface)
Connection for external crystal oscillators
Connection for VREF (external voltage reference)

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.