topic LS1028 SPI 3-wire configuration and GPIO usage for CS in Layerscape https://community.nxp.com/t5/Layerscape/LS1028-SPI-3-wire-configuration-and-GPIO-usage-for-CS/m-p/1992139#M15087 <P>Hello,</P><P>I am design a custom board with the LS1028 processor, and I have a couple of questions regarding SPI configuration:</P><OL><LI>Is it possible to configure SPI in 3-wire mode, or do I need to physically connect MISO and MOSI to achieve this setup?</LI><LI>Is it feasible to use other GPIO pins as Chip Select (CS) lines? For example, on SPI 3, I am already using CS1 and CS2 for USB power management, so I would like to assign another GPIO as a CS pin ( I need 2 CS pin ).</LI></OL><P>Thank you for any guidance you can provide.</P> Mon, 11 Nov 2024 17:28:31 GMT AntoNico10 2024-11-11T17:28:31Z LS1028 SPI 3-wire configuration and GPIO usage for CS https://community.nxp.com/t5/Layerscape/LS1028-SPI-3-wire-configuration-and-GPIO-usage-for-CS/m-p/1992139#M15087 <P>Hello,</P><P>I am design a custom board with the LS1028 processor, and I have a couple of questions regarding SPI configuration:</P><OL><LI>Is it possible to configure SPI in 3-wire mode, or do I need to physically connect MISO and MOSI to achieve this setup?</LI><LI>Is it feasible to use other GPIO pins as Chip Select (CS) lines? For example, on SPI 3, I am already using CS1 and CS2 for USB power management, so I would like to assign another GPIO as a CS pin ( I need 2 CS pin ).</LI></OL><P>Thank you for any guidance you can provide.</P> Mon, 11 Nov 2024 17:28:31 GMT https://community.nxp.com/t5/Layerscape/LS1028-SPI-3-wire-configuration-and-GPIO-usage-for-CS/m-p/1992139#M15087 AntoNico10 2024-11-11T17:28:31Z Re: LS1028 SPI 3-wire configuration and GPIO usage for CS https://community.nxp.com/t5/Layerscape/LS1028-SPI-3-wire-configuration-and-GPIO-usage-for-CS/m-p/1992987#M15093 dear AntoNico10,<BR />yes it is posible to configure SPI with 3-wire and it's necessary to connect MISO and MOSI.<BR />You can uso a GPIO pins as ChipSelect but keep in mind that you have to program the functionality as CS to them. Tue, 12 Nov 2024 17:32:19 GMT https://community.nxp.com/t5/Layerscape/LS1028-SPI-3-wire-configuration-and-GPIO-usage-for-CS/m-p/1992987#M15093 LFGP 2024-11-12T17:32:19Z