MC56U032DCCA Datasheet, PDF (60/64 Pages) Samsung semiconductor – Dual Voltage MultiMediaCard Specification

MultiMediaCard^TM
• Host Command to Card Response - Card is ready
Figure 4-14 Timing diagram of command / response transaction, card is ready
The following timing diagram describes the basic command response (no data) SPI transaction.
• Host Command to Card Response - card is busy
The following timing diagram describes the command response transaction for commands when the card
response is of type R1b (e.g. SET_WRITE_PROT and ERASE). When the card is signaling busy, the
host may deselect it (by raising the CS) at any time. The card will release the DataOut line one clock
after the CS going high. To check if the card is still busy, it needs to be reselected by asserting (set to
low) the CS signal.
The card will resume busy signal (pulling DataOut low) one clock after the falling edge of CS.
Figure 4-15 Timing diagram of command / response transaction, card is busy
• Card Response to Host Command
Figure 4-16 Timing diagram: Card response to the next host command
• Single Block Read
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