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

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/16758#discussion_r701665050">drivers/include/periph/rtc_mem.h</a>:</p>
<pre style='color:#555'>> +/**
+ * @brief Write to RTC memory
+ *
+ * @param[in] offset    Offset to the start of RTC memory in bytes
+ * @param[in] data      Source buffer
+ * @param[in] len       Amount of bytes to write
+ */
+void rtc_mem_write(unsigned offset, const void *data, size_t len);
</pre>
<p>Can we make the behaviour explicit when attempts to write out of bounds? Will it write what it can or fail?</p>

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