<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> oh there it is, SAMD20 errata 1.5.15:</p><p>In Standby, Idle1 and Idle2 Sleep modes, the device might not wake up from sleep. An External Reset, Power-On Reset, or Watchdog Reset will start the device again.</p>