thanks for comment. there is a microcontroller on the other side. the spi works fine. I send data to microcontroller and can read from it properly. but I want to have faster communication. in fact I don't need CS at all.
On Tuesday, June 18, 2019 at 12:42:10 AM UTC+4:30, [email protected] wrote: > > Dennis: > Be careful. Many/most SPI slave devices use the rising edge of the CS > line, following the write activity, to load the data and make it active. > So, you load it serially, but it is not transferred into the active > control or output registers, until CS goes high, making it all take effect > simultaneously. > CS is typically required, even with a single SPI slave on a bus, depending > on how the specific SPI slave works. > --- Graham > > > On Monday, June 17, 2019 at 2:27:26 PM UTC-5, Dennis Lee Bieber wrote: >> >> >> >> A circuit with a single target could, in theory, have the CS line tied >> permanently using a pull-up/pull-down resistor (since you state a falling >> edge, I'd guess pull-down to ground would be the permanent mode). >> >> >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/782ee2bd-d5b3-4a94-828c-d0abc708c48b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
