topic Kl25Z - SPI- Chip select in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319151#M14184 <HTML><HEAD></HEAD><BODY><P>Hi guys ! </P><P></P><P>I'm new and I wanted to know if it's possible to have two slaves controlled by a single spi master (from the kl25z) with the chip select or do I have to use two spi master ?</P><P>I didn't understand where the chip select pin are on the datasheet. It looks like there's just one chip select for an spi master but on several pins ?</P></BODY></HTML> Sat, 14 Jun 2014 17:56:20 GMT wilk 2014-06-14T17:56:20Z Kl25Z - SPI- Chip select https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319151#M14184 <HTML><HEAD></HEAD><BODY><P>Hi guys ! </P><P></P><P>I'm new and I wanted to know if it's possible to have two slaves controlled by a single spi master (from the kl25z) with the chip select or do I have to use two spi master ?</P><P>I didn't understand where the chip select pin are on the datasheet. It looks like there's just one chip select for an spi master but on several pins ?</P></BODY></HTML> Sat, 14 Jun 2014 17:56:20 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319151#M14184 wilk 2014-06-14T17:56:20Z Re: Kl25Z - SPI- Chip select https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319152#M14185 <HTML><HEAD></HEAD><BODY><P>Yes, having two SPI slaves (or more) is easily possible with one SPI master. But in that case disable the automatic chip select feature of the peripheral, because otherwise that chip select is asserted for any bus transfer. Instead, have two normal pins used as chip selects.</P><P></P><P>I hope this helps,</P><P>Erich</P></BODY></HTML> Sat, 14 Jun 2014 18:00:30 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319152#M14185 BlackNight 2014-06-14T18:00:30Z Re: Kl25Z - SPI- Chip select https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319153#M14186 <HTML><HEAD></HEAD><BODY><P>Ok thanks ! Well do you maybe know if disabling the automatic chip select would be a problem if I want to communicate with an Ethercat ASIC ?</P></BODY></HTML> Sat, 14 Jun 2014 18:04:16 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319153#M14186 wilk 2014-06-14T18:04:16Z Re: Kl25Z - SPI- Chip select https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319154#M14187 <HTML><HEAD></HEAD><BODY><P>this should not be a problem at all. Just make sure you have the chip select line configured properly. I did this with a Beckhoff Ethercat module.</P></BODY></HTML> Sat, 14 Jun 2014 19:01:22 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319154#M14187 BlackNight 2014-06-14T19:01:22Z Re: Kl25Z - SPI- Chip select https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319155#M14188 <HTML><HEAD></HEAD><BODY><P>Ok all right ! Then everything is fine :smileyhappy:</P></BODY></HTML> Sat, 14 Jun 2014 19:21:18 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Kl25Z-SPI-Chip-select/m-p/319155#M14188 wilk 2014-06-14T19:21:18Z