topic Not getting ACK from FXOS8700C in Sensors https://community.nxp.com/t5/Sensors/Not-getting-ACK-from-FXOS8700C/m-p/806825#M5176 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am having trouble getting an ACK from the FXOS8700C. It seems like it should be pretty straight forward. I am using the BRKT-STBC-AGM01 with my own MCU and even tried two boards in case one was damaged. I referenced this post as well:&nbsp;<A _jive_internal="true" class="link-titled" href="https://community.nxp.com/message/926172?q=BRKT-STBC-AGM01%20connections" title="https://community.nxp.com/message/926172?q=BRKT-STBC-AGM01%20connections" target="_blank">https://community.nxp.com/message/926172?q=BRKT-STBC-AGM01%20connections</A>&nbsp;</P><P></P><P>My connections on the below board:</P><P></P><P>J3.1, J3.3 - Vdd (3.3V)</P><P>J3.2, J4.5 - GND</P><P>J3.4 - SCL</P><P><SPAN>J3.</SPAN>5 - SDA</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="Pinout.JPG"><img src="https://community.nxp.com/t5/image/serverpage/image-id/75943i19C6F373D4773628/image-size/large?v=v2&amp;px=999" role="button" title="Pinout.JPG" alt="Pinout.JPG" /></span></P><P></P><P>Here is the scope capture:</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/75896i733ACA7CE1E4FD81/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P></P><P>I cannot communicate to either sensor. My board communicates fine to other connected sensors.&nbsp;</P><P></P><P>Any ideas? Thank you.&nbsp;</P></BODY></HTML> Tue, 03 Feb 2026 22:32:39 GMT nishant1 2026-02-03T22:32:39Z Not getting ACK from FXOS8700C https://community.nxp.com/t5/Sensors/Not-getting-ACK-from-FXOS8700C/m-p/806825#M5176 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am having trouble getting an ACK from the FXOS8700C. It seems like it should be pretty straight forward. I am using the BRKT-STBC-AGM01 with my own MCU and even tried two boards in case one was damaged. I referenced this post as well:&nbsp;<A _jive_internal="true" class="link-titled" href="https://community.nxp.com/message/926172?q=BRKT-STBC-AGM01%20connections" title="https://community.nxp.com/message/926172?q=BRKT-STBC-AGM01%20connections" target="_blank">https://community.nxp.com/message/926172?q=BRKT-STBC-AGM01%20connections</A>&nbsp;</P><P></P><P>My connections on the below board:</P><P></P><P>J3.1, J3.3 - Vdd (3.3V)</P><P>J3.2, J4.5 - GND</P><P>J3.4 - SCL</P><P><SPAN>J3.</SPAN>5 - SDA</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="Pinout.JPG"><img src="https://community.nxp.com/t5/image/serverpage/image-id/75943i19C6F373D4773628/image-size/large?v=v2&amp;px=999" role="button" title="Pinout.JPG" alt="Pinout.JPG" /></span></P><P></P><P>Here is the scope capture:</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/75896i733ACA7CE1E4FD81/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P></P><P>I cannot communicate to either sensor. My board communicates fine to other connected sensors.&nbsp;</P><P></P><P>Any ideas? Thank you.&nbsp;</P></BODY></HTML> Tue, 03 Feb 2026 22:32:39 GMT https://community.nxp.com/t5/Sensors/Not-getting-ACK-from-FXOS8700C/m-p/806825#M5176 nishant1 2026-02-03T22:32:39Z Re: Not getting ACK from FXOS8700C https://community.nxp.com/t5/Sensors/Not-getting-ACK-from-FXOS8700C/m-p/806826#M5177 <HTML><HEAD></HEAD><BODY><P>GPIO on MCU needed to be configured as Open Drain, it was previously configured as Push/Pull. Hopefully this can help someone else in the future!</P></BODY></HTML> Fri, 19 Oct 2018 21:06:19 GMT https://community.nxp.com/t5/Sensors/Not-getting-ACK-from-FXOS8700C/m-p/806826#M5177 nishant1 2018-10-19T21:06:19Z