I want to perform SPI communication between YRDKRX62N and a slave. SPI0 can communicate with 4 slaves. However, according to the pin definitions in the library and the attached diagram on the Kit, these slave select pins have been specially configured for modules such as Wifi, LCD, Flash, and SD. But these pins are still available on the Kit, so I wonder if I can use these slave select pins for other slaves that I want to communicate with.