https://devzone.nordicsemi.com/f/nordic-q-a/119160/i2c-twim-doesn-t-work-properly-on-nrf54l15dkHi, we have nRF54L15DK (rev. 0.9.1). connected to MAX77655 via I2C. I am trying to test i2c21 and i2c22 for writing data. I have tested it on different SCK and SDA on GPIO pins, but not all of them work. I respect the clock and port limitations foren-USTelligent Community 13Tue, 25 Feb 2025 15:25:02 GMThttps://devzone.nordicsemi.com/thread/524658?ContentTypeID=1Tue, 25 Feb 2025 15:25:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:70af85c9-62d2-40d4-84a4-fb321f99cde8Asbj&#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 Peter,</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;">P1.03/P1.11 -&gt;&nbsp; No obvious reason why this combination isn&#39;t working unless you have enabled the NFC&nbsp; functionality or plugged in the NFC antenna?</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;">P2.06/P2.08 -&gt; These does overlap with the TRACE interface if you have enabled trace data debugging?</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;">P1.08/P1.11 -&gt; This looks very noisy and seemingly loaded with some capacitance. Are you using analog probes to capture the signals? Is the interface working if the probes are not on the pins?</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;">How have you connected the nRF54L15 with the PMIC MAX77655, are you using some cables ebtween them?</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>