MultiMediaCardTM
check did not fail) or not.
In the case of transmission error the card sends a negative CRC status (“101” bin) which forces the host
to retransmit the data. In the case of non-erroneous transmission the card sends a positive CRC status
(“010” bin) and starts the data programming procedure.
Timing of The block Write Command
If the card does not have any more free data receive buffer, the card indicates it by pulling down the data
line to LOW. The card stops pulling down the data line as soon as at least one receive buffer for the
defined data transfer block length becomes free. This signaling does not give any information about the
data write status. This information has to be polled by the status polling command.
Erase block timing
The host must first tag the sector to erase. The tagged sector(s) are erased in parallel by using the
CMD35,36 CMD38. The card busy signaling is also used for the indication of the card erase procedure
duration. In this case the end of the card busy signaling also does mean that the erase of all tagged
sectors has been finished. The host can (also) request the card to send the actual card state using the
CMD13.
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SAMSUNG [ SAMSUNG ]
