Based on L6470 datasheet -> 3. Electrical characteristics -> SPI ->
tholCS Chip select hold time min 10 ns.
Does 10ns is correct value? I searched from google, the following link says
https://electronics.stackexchange.com/questions/152700/spi-chip-select-data-clock-delay-tolerance#:~:text=SPI%20interfaces%20can%20also%20be,it%20can%20be%20asserted%20again.
"
the delay must be no shorter than a certain value, usually a couple hundred ns. Moreover, it's the delay between assertion of CS and the first edge of the clock signal. It has nothing to do with the data line at all.
"
Does anyone has an issue on CS hold time? When I use ArduinoUNO to control L6470, everything worked OK, and I see the CS setup time > 1000 ns, and CS holdtime > 1000ns, when I use Toradex Colibri EVA board(Linux kernel) to control the L6470, MISO line always low, and CS setup time > 1000 ns, and CS holdtime = 128ns.
Please help.
Thank you.
