<p><b>@roberthartung</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11122#discussion_r263365155">cpu/atmega_common/periph/gpio.c</a>:</p>
<pre style='color:#555'>> +
+    __exit_isr();
+}
+#if defined(PCINT0_IDX)
+ISR(PCINT0_vect, ISR_BLOCK)
+{
+    pcint_handler(PCINT0_IDX, &PCMSK0);
+}
+#endif
+
+#if defined(PCINT1_IDX)
+ISR(PCINT1_vect, ISR_BLOCK)
+{
+    pcint_handler(PCINT1_IDX, &PCMSK1);
+}
+#endif  /* PCINT1_vect */
</pre>
<p>Ack.</p>

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