https://devzone.nordicsemi.com/f/nordic-q-a/34082/why-twi-can-t-work-at-100k-freqHi dear engineers, I have a strange TWI problem on my production protype which programmed based on the official twi example with softdevice s130_nrf51_2.0.1 and SDK 12.3.0. The device worked under a 16M XTAL HF clock and 32.768k Rail-2-Rail LF Clocken-USTelligent Community 13Wed, 16 May 2018 11:49:43 GMThttps://devzone.nordicsemi.com/thread/132258?ContentTypeID=1Wed, 16 May 2018 11:49:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:956250f8-fdb1-4063-a446-6a3a58233467Turbo J<p>Why the heck didn&#39;t you post an 100kHz screenshot? If you don&#39;t see anything on the scope, you have a software problem rather than hardware.</p> <p></p> <p>I have this rigol scope, and it CAN do screenshots on an USB flash drive. Use this feature next time, please - your photos are barely readable.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/132251?ContentTypeID=1Wed, 16 May 2018 11:41:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d61b9426-0a0c-47a8-9d5a-cfbac04b628fFormerMember<p>Could you upload a similar plot from the oscilloscope when using 100k?</p> <p>When setting the frequency to 100k, what happens? Is there any error codes? An assert or a hardfault? How do you see in the code that it doesn&#39;t work?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/131544?ContentTypeID=1Wed, 09 May 2018 13:49:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:05f34180-db4e-4b4a-b617-ab2af8f500celuohuabo<p>Hi Kristin,</p> <p>Thank you.</p> <p>The Prioprity is 3 according to the default setting for nrf51 in the file &lt;sdk_config.h&gt;.</p> <p>#ifndef TWI_DEFAULT_CONFIG_IRQ_PRIORITY<br />#define TWI_DEFAULT_CONFIG_IRQ_PRIORITY 3<br />#endif</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/131329?ContentTypeID=1Tue, 08 May 2018 09:33:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:305c7187-2917-4b42-88ff-a6481b918abdFormerMember<p>At which priority does TWI run?</p><div style="clear:both;"></div>