Data Sheet

send the card to SPI mode.
CMD8 is newly added in the Physical Layer Specification Version 2.00 to support multiple voltage ranges and
used to check whether the card supports supplied voltage. The version 2.00 or later host shall issue CMD8 and
verify voltage before card initialization. The host that does not support CMD8 shall supply high voltage range.
ACMD41 is a synchronization command used to negotiate the operation voltage range and to poll the cards
until they are out of their power-up sequence. In case the host system connects multiple cards,the host shall
check that all cards satisfy the supplied voltage. Otherwise, the host should select one
of the cards and initialize
4.1.2 Power Up Time of Host
Host needs to keep power line level less than 0.5V and more than 1ms before power ramp up