| SPI Device Drivers | |
| ctl_ms_sd_spi_read_sectors | Read sectors from a media card in SPI mode |
| ctl_ms_sd_spi_write_sectors | Write sectors from a media card in SPI mode |
| SPI | |
| ctl_ms_sd_spi_read_cid | Reads the CID register from a media card in SPI mode |
| ctl_ms_sd_spi_read_csd | Reads the CSD register from a media card in SPI mode |
| ctl_ms_sd_spi_read_scr | Reads the SCR register from a media card in SPI mode |
| ctl_ms_sd_spi_sense_media | Sense the media type (SD or MMC) attached to the drive |