<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.social/@cr1901" class="u-url mention">@<span>cr1901</span></a></span> the E pin on that board sits between a top layer ground pour which wraps around the rest of the IOs, and whose currents can only really get back to the supply ground by going in the complete opposite direction to reach a via, and the RW pin which is directly tied to ground. so I'm betting the vast majority of the return currents for D0-D7, A, and K, are trying to couple through E to get back to ground via the RW pad.</p>
