topic Re: The VBAT pin in the KM34 in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/The-VBAT-pin-in-the-KM34/m-p/712148#M43718 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>Please check below KM34 block diagram, the 32K OSC was powered from VBAT pin.</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/32313i74F614B362A1212E/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>Thank you for the attention.</P><P><BR />Have a great day,<BR />Ma Hui</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 26 Sep 2017 05:08:35 GMT Hui_Ma 2017-09-26T05:08:35Z The VBAT pin in the KM34 https://community.nxp.com/t5/Kinetis-Microcontrollers/The-VBAT-pin-in-the-KM34/m-p/712147#M43717 <HTML><HEAD></HEAD><BODY><P style="margin: 0cm 0cm 0pt;"><SPAN style="color: #000000; font-size: medium; font-family: Calibri;">I do not use VBAT in my project. So I connect the VBAT pin to ground.</SPAN></P><P style="margin: 0cm 0cm 0pt;"><SPAN style="color: #000000; font-size: medium; font-family: Calibri;">But I want to use the external 32K for the AFE.</SPAN></P><P style="margin: 0cm 0cm 0pt;"><SPAN style="color: #000000; font-size: medium; font-family: Calibri;">Now I find that the external 32K cannot be initialized.It always stays in the function " PLL_Enable (PLL32KREF_SRC1); ".</SPAN></P><P style="margin: 0cm 0cm 0pt;"><SPAN style="color: #000000; font-size: medium; font-family: Calibri;">Is it affected by the VBAT pin connected to ground? </SPAN></P></BODY></HTML> Mon, 25 Sep 2017 03:49:02 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/The-VBAT-pin-in-the-KM34/m-p/712147#M43717 小勇邹 2017-09-25T03:49:02Z Re: The VBAT pin in the KM34 https://community.nxp.com/t5/Kinetis-Microcontrollers/The-VBAT-pin-in-the-KM34/m-p/712148#M43718 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>Please check below KM34 block diagram, the 32K OSC was powered from VBAT pin.</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/32313i74F614B362A1212E/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>Thank you for the attention.</P><P><BR />Have a great day,<BR />Ma Hui</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 26 Sep 2017 05:08:35 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/The-VBAT-pin-in-the-KM34/m-p/712148#M43718 Hui_Ma 2017-09-26T05:08:35Z