https://community.nxp.com/t5/Kinetis-Software-Development-Kit/When-starting-I2C-SCL-and-SDA-go-low-at-the-same-time/m-p/1593853#M8166 <P>I am doing I2C with MKL03Z32CAF4. However, when starting I2C, SCL and SDA go from High to Low at the same time, so I feel that the start condition is not met. Therefore, the slave is not released and ACK is not returned.<BR />Please let me know if you know of a solution to this problem.</P> Mon, 06 Feb 2023 09:35:39 GMT hiro_yamamoto 2023-02-06T09:35:39Z https://community.nxp.com/t5/Kinetis-Software-Development-Kit/When-starting-I2C-SCL-and-SDA-go-low-at-the-same-time/m-p/1593853#M8166 <P>I am doing I2C with MKL03Z32CAF4. However, when starting I2C, SCL and SDA go from High to Low at the same time, so I feel that the start condition is not met. Therefore, the slave is not released and ACK is not returned.<BR />Please let me know if you know of a solution to this problem.</P> Mon, 06 Feb 2023 09:35:39 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/When-starting-I2C-SCL-and-SDA-go-low-at-the-same-time/m-p/1593853#M8166 hiro_yamamoto 2023-02-06T09:35:39Z https://community.nxp.com/t5/Kinetis-Software-Development-Kit/When-starting-I2C-SCL-and-SDA-go-low-at-the-same-time/m-p/1594957#M8167 <P class="lia-align-justify">Hello <a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/212051">@hiro_yamamoto</a>,</P> <P class="lia-align-justify">Could you please try out the I2C SDK's examples?</P> <P class="lia-align-justify">Also, just for double check, could you please check that you placed correctly the pull-up resistors in SDA and SCL lines?</P> <P class="lia-align-justify">We attach you the I2C specification and user manual, it might be useful.</P> <P class="lia-align-justify">Best regards, Raul.</P> Tue, 07 Feb 2023 18:57:51 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/When-starting-I2C-SCL-and-SDA-go-low-at-the-same-time/m-p/1594957#M8167 RaRo 2023-02-07T18:57:51Z