Power ManagementのトピックEstablishing SPI communication between Two MC33771 and Master Controller Unit. https://community.nxp.com/t5/Power-Management/Establishing-SPI-communication-between-Two-MC33771-and-Master/m-p/1406872#M1756 <P>Hello all,</P><P>I am using MC33771 for BMS development, for 16 cell battery.<BR />MC33771 is 14 channel cell controller. Thus using two of them, eight channel from each MC33771 cell controller.&nbsp;</P><P>These two MC33771 cell controller will be communicating through SPI with the Master Controller.<BR />Master Controller has two SPI Modules say, SPI A and SPI B,</P><P>The question is, is it OK to connect the SPI A of MCU with MC33771 Cell Controller and SPI B of MCU with other MC33771 cell controller.<BR />If it is connected will the battery get shorted in the MCU, because it will be having a common ground for both SPI lines.</P> Sun, 30 Jan 2022 06:39:13 GMT Autoven 2022-01-30T06:39:13Z Establishing SPI communication between Two MC33771 and Master Controller Unit. https://community.nxp.com/t5/Power-Management/Establishing-SPI-communication-between-Two-MC33771-and-Master/m-p/1406872#M1756 <P>Hello all,</P><P>I am using MC33771 for BMS development, for 16 cell battery.<BR />MC33771 is 14 channel cell controller. Thus using two of them, eight channel from each MC33771 cell controller.&nbsp;</P><P>These two MC33771 cell controller will be communicating through SPI with the Master Controller.<BR />Master Controller has two SPI Modules say, SPI A and SPI B,</P><P>The question is, is it OK to connect the SPI A of MCU with MC33771 Cell Controller and SPI B of MCU with other MC33771 cell controller.<BR />If it is connected will the battery get shorted in the MCU, because it will be having a common ground for both SPI lines.</P> Sun, 30 Jan 2022 06:39:13 GMT https://community.nxp.com/t5/Power-Management/Establishing-SPI-communication-between-Two-MC33771-and-Master/m-p/1406872#M1756 Autoven 2022-01-30T06:39:13Z Re: Establishing SPI communication between Two MC33771 and Master Controller Unit. https://community.nxp.com/t5/Power-Management/Establishing-SPI-communication-between-Two-MC33771-and-Master/m-p/1408217#M1763 <P>Hello Autoven,</P> <P>Have you considered using two parallel MC33771 devices with the same SPI bus but with different chip selects?</P> <P>&nbsp;</P> <P>Regards,</P> <P>David</P> Wed, 02 Feb 2022 18:00:37 GMT https://community.nxp.com/t5/Power-Management/Establishing-SPI-communication-between-Two-MC33771-and-Master/m-p/1408217#M1763 diazmarin09 2022-02-02T18:00:37Z