SD Card Registers
Register representations can be created from an array of little endian words. Note that the SDMMC protocol transfers the registers in big endian byte order.
let scr: SCR = [0, 1].into();
PLSS_v7_10: Physical Layer Specification Simplified Specification Version 7.10. March 25, 2020. (C) SD Card Association
Card interface condition (R7)
Card Identification Register (CID)
Card Specific Data (CSD)
Card Status (R1)
Host to Card commands
Operation Conditions Register (OCR)
Relative Card Address (RCA)
SD CARD Configuration Register (SCR)
The number of data lines in use on the SDMMC bus
Types of SD Card
CURRENT_STATE enum. Used for R1 response in command queue mode.