https://devzone.nordicsemi.com/f/nordic-q-a/37238/vdd-and-actual-reset-level-with-nrf51802Using a nRF51802, but can&#39;t find data about actual reset level other than min. VDD 1,8V ?? (Page 34 in datasheet ) I need to know actual reset level (VDD) for both rising and falling signals - I need to determine if I have to use other external componentsen-USTelligent Community 13Wed, 08 Aug 2018 11:24:27 GMThttps://devzone.nordicsemi.com/thread/143344?ContentTypeID=1Wed, 08 Aug 2018 11:24:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c906f5a5-ce1a-4276-a9ea-9fd1d6c6cd4fKenneth<p>Hi,</p> <p>The minimum operating conditions is 1.8V, this means that we guarantee that the chip operate down to this level. Below 1.8V&nbsp;the nRF51 will trigger BOR before it may fail, the exact voltage level will vary a bit due to variation in process and state. We don&#39;t have any exact value to how low you must pull VDD to ensure BOR to always trigger. For instance if the chip is in sleep state, the voltage may actually fall well below 1.8V without BOR to trigger, as long as VDD is above 1.8V when it wakeup. I recommend that if you want to reset the nRF51 you either use pin reset or pull VDD to less than &lt;0.3V.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>