3.7.8. mmc_extcsd - Read/write the extended CSD register.¶

3.7.8.1. Usage¶

mmc_extcsd dev [-r | -i index [-r | -v value [-y]]]

`-i`	field index of the register
`-r`	print the register as raw data
`-v`	value which will be written
`-y`	don’t request when writing to one time programmable fields