https://test-devzone.nordicsemi.com/f/nordic-q-a/87746/nrf52832-reset-icHello, Technical support team In the past, I contacted you to confirm nRF52832 application. This time, I have a question for a external reset as follows. My application is 2.5V input operating, but the rise time for the input voltage is very slowen-USTelligent Community 13 Non-ProductionTue, 10 May 2022 10:41:02 GMThttps://test-devzone.nordicsemi.com/thread/367142?ContentTypeID=1Tue, 10 May 2022 10:41:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5f807615-1009-4ba0-a1e4-576cd78b0e2cuser2111<p>Hello,</p> <p>The slowest allowed rise time on VDD from 0V -&gt; 1.7V is 60ms:<br /><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/recommended_op_conditions.html#concept_vng_xls_2q">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/recommended_op_conditions.html#concept_vng_xls_2q</a>&nbsp;</p> <p>We do not guarantee that the chip will start with slower rise than this, the pin reset may not work if the initial rise time was slower than this. The internal SoC require a valid POR signal to start operating as specified, and the POR signal may not trigger if VDD ramp up is slower than 60ms.</p> <p>You will have to redesign your board, e.g. by using a voltage detector to only feed VDD to the nRF52832 only after VDD are above 1.7V.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>