https://devzone.nordicsemi.com/f/nordic-q-a/101848/uart-baudrate-when-using-sdh_clock_lf_srcCan I achieve 250000 baud with selecting NRF_SDH_CLOCK_LF_SRC (configuration placed as code snippet above)? Thanks and regards, Lalen-USTelligent Community 13Thu, 27 Jul 2023 07:49:01 GMThttps://devzone.nordicsemi.com/thread/438433?ContentTypeID=1Thu, 27 Jul 2023 07:49:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d78e68c-4ad3-41aa-ab24-11795c93a416maveli<p>Hi,</p> <p></p> <p>thanks a lot.&nbsp;</p> <p></p> <p>Best regards,</p> <p>Lal</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/436418?ContentTypeID=1Fri, 14 Jul 2023 08:47:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4af274d0-fe88-41aa-ab50-a80190739902J&#248;rgen Holmefjord<p>Hi,</p> <p>The UART baudrate is not dependent on the LFCLK source configuration. The UART peripheral uses the 16 MHz peripheral clock PCLK16M, which is running from the HFCLK. The accuracy of the UART baudrate will depend on the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/clock.html#concept_rp5_fgp_bs">HFCLK source</a> (HFINT or HFXO), but all <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/uarte.html#register.BAUDRATE">baudrate configurations</a> are supported with both clock source options.</p> <p>Note that for higher baudrates, we recommend using HW flow control and/or <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/lib_libuarte.html">libUARTE</a>&nbsp;to avoid data loss.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>