topic PCA9617A in Other NXP Products https://community.nxp.com/t5/Other-NXP-Products/PCA9617A/m-p/859963#M6746 <HTML><HEAD></HEAD><BODY><DIV><SPAN lang="en"><SPAN title=""></SPAN></SPAN><DIV><SPAN lang="en"><SPAN title="">In the PCA9617A data sheet, is it necessary to have a high pulse after ACK on SDA in Figure 8.</SPAN></SPAN></DIV><DIV><SPAN lang="en"><SPAN title="">When level conversion of data (part of slave register address) from SDAA to SDAB of PCA 9617A, the data&nbsp;may change&nbsp; probably because there is not the high pulse.</SPAN></SPAN></DIV></DIV></BODY></HTML> Thu, 28 Mar 2019 02:33:18 GMT n-ogawa 2019-03-28T02:33:18Z PCA9617A https://community.nxp.com/t5/Other-NXP-Products/PCA9617A/m-p/859963#M6746 <HTML><HEAD></HEAD><BODY><DIV><SPAN lang="en"><SPAN title=""></SPAN></SPAN><DIV><SPAN lang="en"><SPAN title="">In the PCA9617A data sheet, is it necessary to have a high pulse after ACK on SDA in Figure 8.</SPAN></SPAN></DIV><DIV><SPAN lang="en"><SPAN title="">When level conversion of data (part of slave register address) from SDAA to SDAB of PCA 9617A, the data&nbsp;may change&nbsp; probably because there is not the high pulse.</SPAN></SPAN></DIV></DIV></BODY></HTML> Thu, 28 Mar 2019 02:33:18 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA9617A/m-p/859963#M6746 n-ogawa 2019-03-28T02:33:18Z Re: PCA9617A https://community.nxp.com/t5/Other-NXP-Products/PCA9617A/m-p/859964#M6747 <HTML><HEAD></HEAD><BODY><P>Hi&nbsp;Naoyuki,</P><P></P><P>It is common to have such a high pulse after the ACK and before the next data byte because the SDA line is no longer pulled low by the slave. During that time it is pulled high through a pull-up resistor.&nbsp;</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/77556i536E33DB8A27D047/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P></P><P>Best regards,</P><P>Tomas</P><P></P><P><EM style="border: none windowtext 1.0pt; padding: 0in; color: #3d3d3d; font-size: 9.0pt; ">PS:&nbsp;If my answer helps to solve your question, please mark it as "Correct" or “Helpful”. Thank you.</EM></P></BODY></HTML> Thu, 28 Mar 2019 11:11:58 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA9617A/m-p/859964#M6747 TomasVaverka 2019-03-28T11:11:58Z