https://devzone.nordicsemi.com/f/nordic-q-a/118246/npm1300-twi-i2c-i-f-with-nrf5xHi At nPM1300 product specification V1.1 page 148(8.1 Schematic) The control I/F between nPM1300 and nRF5x is TWI(I2C), and there is four signals(SCL, SDA, Reset, INT) SCL, SDA &amp; INT are usual signals for I2C as I know, so what the purpose for thisen-USTelligent Community 13Wed, 22 Jan 2025 13:14:25 GMThttps://devzone.nordicsemi.com/thread/519564?ContentTypeID=1Wed, 22 Jan 2025 13:14:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61abef08-a9fe-4577-8f9d-a85913c4483dketiljo[quote user=""]SCL, SDA &amp; INT are usual signals for I2C as I know, so what the purpose for this reset signal[/quote] <p>RESET here is used to get the nPM1300 out of ship or hibernate mode, see&nbsp;<a href="https://docs.nordicsemi.com/bundle/ps_npm1300/page/chapters/core_components/reset/doc/frontpage.html">https://docs.nordicsemi.com/bundle/ps_npm1300/page/chapters/core_components/reset/doc/frontpage.html</a></p> [quote user=""]And this reset action is active by press “SW1”?[/quote] <p>You can define any of teh GPIOs to be a reset input, see&nbsp;<a href="https://docs.nordicsemi.com/bundle/ps_npm1300/page/chapters/core_components/gpio/doc/frontpage.html,">https://docs.nordicsemi.com/bundle/ps_npm1300/page/chapters/core_components/gpio/doc/frontpage.html,</a>&nbsp;GPIOMODE[n]</p> [quote user=""]Since our SCH don’t have “SW1”, the reset signal connection still need exist? Or can delete?[/quote] <p>Yes, if you don&#39;t need this, you don&#39;t have to set it up.</p> [quote user=""]Also this I2C I/F can only connect to nRF5x P0.xx? Or can connect to P1.xx &amp; P2.xx too?[/quote] <p>On nRF52 and nRF53, any pins can be used for TWI.</p><div style="clear:both;"></div>