I have rather odd TFT display I am using to learn how to code SPI.
According to "standard" SPI I need 4 wires for interface to RPi.
Now the "standard" naming seems to be eluding some vendors.
I can relate standard /SS to /CS - useful to enable more devices on single SPI bus
is a different story , but vendors naming convention likes DIN DOUT can be decoded
Clock and its naming can also be decoded from datasheet.
why does SPI / TFT display hardware has "C/D" pin beats me.
(The TFT pins are on separate SPI bus, so is SD.)
PS I am deliberately avoiding any vendors "part number / module designation."