https://devzone.nordicsemi.com/f/nordic-q-a/116642/qfb8905-nrf52840-dkDear, My customer interesting in nRF52840-DK and would like to know the U2 (IC). Customer wants the nRF52840-DK board it must be installed IC in the same package (QFP) as shown in the picture(1) But if it’s not or U2 (IC) is installed in the BGAen-USTelligent Community 13Mon, 25 Nov 2024 10:07:46 GMThttps://devzone.nordicsemi.com/thread/511855?ContentTypeID=1Mon, 25 Nov 2024 10:07:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f4d2327c-2532-48db-a17d-7f3f2b61700eAsbj&#248;rn<div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">Hello Suphachai,</div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;"></div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">The chip with the sticker on it that says &quot;PCA10056, 2.0.1....&quot; and so on is the chip for debugging and flashing the nRF deviceth the far right on your DK. It&#39;s there as a development tool and wouldn&#39;t be included in a customer board.</div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;"></div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">I&#39;d recommend you to have a look at the nRF52840 DK user guide and documentation here:<span>&nbsp;</span><a style="border:0;margin:0;padding:0;vertical-align:baseline;" href="https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/GetStarted">https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/GetStarted</a>&nbsp;it explains the board and the various parts of it. The Segger J-link interface chip that you are asking about have some more details here:<span>&nbsp;</span><a style="border:0;margin:0;padding:0;vertical-align:baseline;" href="https://docs.nordicsemi.com/bundle/ug_nrf52840_dk/page/UG/dk/if_mcu.html">https://docs.nordicsemi.com/bundle/ug_nrf52840_dk/page/UG/dk/if_mcu.html</a></div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;"></div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;"></div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">Best regards</div> <div style="border:0;color:rgba(0, 0, 0, 1);font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">Asbjørn</div><div style="clear:both;"></div>