OPTION SDCARD CSpin [,CLKpin, MOSIpin, MISOpin]
OPTION SDCARD DISABLE
Specify or disable the I/O pins to use for the SD Card interface.
If the optional pins are not specified the SD Card will use the pins specified by OPTION SYSTEM SPI.
Note: The pins specified by OPTION SYSTEM SPI must be a valid set of hardware SPI pins (SPI or SPI2), however, the pins specified by OPTION SDCARD can be any pins. The pins specified by OPTION SYSTEM SPI and OPTION SDCARD cannot be the same.
This command must be run at the command prompt (not in a program).