https://community.nxp.com/t5/i-MX-Processors/i-MX-RT1020-GPIO-Default-Setting/m-p/1490006#M192573 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/203663">@willy_lu</a>&nbsp;</P> <P>I hope that you are doing great!</P> <P>Keeper means that the pin will keep&nbsp; the logic level it had before going to reset. Let's put this scenario.</P> <P><SPAN>If the pin was an output high during program execution. After the reset it will be an input, but pulled by a very weak internal resistor. The same concept applies if it was low.&nbsp;</SPAN></P> <P><SPAN>But also, if you apply 3.3v&nbsp; to your pin, after reset it will be pulled up <LI-EMOJI id="lia_slightly-smiling-face" title=":slightly_smiling_face:"></LI-EMOJI></SPAN></P> <P><SPAN>I hope this could help you.&nbsp;</SPAN></P> <P><SPAN>Diego.</SPAN></P> Fri, 15 Jul 2022 03:28:53 GMT diego_charles 2022-07-15T03:28:53Z https://community.nxp.com/t5/i-MX-Processors/i-MX-RT1020-GPIO-Default-Setting/m-p/1489235#M192508 <P>Dear I.mxRT1020 support,</P><P><BR />I have a question, GPIO default Setting for RT1020.<BR />What does the keeper setting in the datasheet mean? Fig1<BR />We don't want all GPIO to be floating at boot up sequence?Fig2</P><P>Fig1</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="擷取.JPG" style="width: 653px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/186576i4A47D3D74574AA2C/image-dimensions/653x292?v=v2" width="653" height="292" role="button" title="擷取.JPG" alt="擷取.JPG" /></span></P><P>Fig2</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="擷取2.JPG" style="width: 511px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/186582iE12DFA929F3388AB/image-dimensions/511x293?v=v2" width="511" height="293" role="button" title="擷取2.JPG" alt="擷取2.JPG" /></span></P><P>Thanks&nbsp;support.</P><P>Willy.</P> Thu, 14 Jul 2022 06:37:42 GMT https://community.nxp.com/t5/i-MX-Processors/i-MX-RT1020-GPIO-Default-Setting/m-p/1489235#M192508 willy_lu 2022-07-14T06:37:42Z https://community.nxp.com/t5/i-MX-Processors/i-MX-RT1020-GPIO-Default-Setting/m-p/1490006#M192573 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/203663">@willy_lu</a>&nbsp;</P> <P>I hope that you are doing great!</P> <P>Keeper means that the pin will keep&nbsp; the logic level it had before going to reset. Let's put this scenario.</P> <P><SPAN>If the pin was an output high during program execution. After the reset it will be an input, but pulled by a very weak internal resistor. The same concept applies if it was low.&nbsp;</SPAN></P> <P><SPAN>But also, if you apply 3.3v&nbsp; to your pin, after reset it will be pulled up <LI-EMOJI id="lia_slightly-smiling-face" title=":slightly_smiling_face:"></LI-EMOJI></SPAN></P> <P><SPAN>I hope this could help you.&nbsp;</SPAN></P> <P><SPAN>Diego.</SPAN></P> Fri, 15 Jul 2022 03:28:53 GMT https://community.nxp.com/t5/i-MX-Processors/i-MX-RT1020-GPIO-Default-Setting/m-p/1490006#M192573 diego_charles 2022-07-15T03:28:53Z