https://community.nxp.com/t5/Sensors/LPC845-NBP8FD4ST1/m-p/2108419#M8837 <P>In the NBP8FD4ST1, I need to verify the communication between the NBP8 and the LPC845. I read the SPIOPS (0x0038) register and received 0x81F0 in response to the 0x0038 command. The binary form of the response is 1000 0001 1111 0000 (0x81F0). From this, I extracted the SPIOPS register value as 0x124. But, the expected value should be 0x04. Is this correct?<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="NBP8_SPIOPS_check.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/340829i652C570BA8D4DF69/image-size/large?v=v2&amp;px=999" role="button" title="NBP8_SPIOPS_check.png" alt="NBP8_SPIOPS_check.png" /></span></P> Tue, 03 Feb 2026 21:17:47 GMT Madhavi123328 2026-02-03T21:17:47Z https://community.nxp.com/t5/Sensors/LPC845-NBP8FD4ST1/m-p/2108419#M8837 <P>In the NBP8FD4ST1, I need to verify the communication between the NBP8 and the LPC845. I read the SPIOPS (0x0038) register and received 0x81F0 in response to the 0x0038 command. The binary form of the response is 1000 0001 1111 0000 (0x81F0). From this, I extracted the SPIOPS register value as 0x124. But, the expected value should be 0x04. Is this correct?<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="NBP8_SPIOPS_check.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/340829i652C570BA8D4DF69/image-size/large?v=v2&amp;px=999" role="button" title="NBP8_SPIOPS_check.png" alt="NBP8_SPIOPS_check.png" /></span></P> Tue, 03 Feb 2026 21:17:47 GMT https://community.nxp.com/t5/Sensors/LPC845-NBP8FD4ST1/m-p/2108419#M8837 Madhavi123328 2026-02-03T21:17:47Z https://community.nxp.com/t5/Sensors/LPC845-NBP8FD4ST1/m-p/2110101#M8842 <P>Hi Madhavi,</P> <P>From the screenshot I see that&nbsp; you are sending and reading LSB first / MSB last whereas the NBP implements MSB first / LSB last.</P> <P>So, a command to read SPIOPS should be sent as 0x00E1 instead of 0xE100.</P> <P>For resources on SPI communication, please refer to:<BR />- The app note below on the NBP webpage (<A href="https://www.nxp.com/products/NBP8-9x" target="_blank">https://www.nxp.com/products/NBP8-9x</A>). It has an associated file which is an excel tool to encode and decode SPI commands and responses.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1.png" style="width: 529px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/341297iE46BA56954A65FD2/image-dimensions/529x154?v=v2" width="529" height="154" role="button" title="1.png" alt="1.png" /></span></P> <P>- The user guide of the KE15Z Host application for NBP8, which includes screenshots of SPI communication. The user guide can be found in below package:<BR /><A href="https://www.nxp.com/webapp/Download?colCode=NBP8x_Application&amp;appType=license" target="_blank">https://www.nxp.com/webapp/Download?colCode=NBP8x_Application&amp;appType=license</A></P> <P>BRs, Tomas</P> Wed, 04 Jun 2025 06:35:59 GMT https://community.nxp.com/t5/Sensors/LPC845-NBP8FD4ST1/m-p/2110101#M8842 TomasVaverka 2025-06-04T06:35:59Z