MC56U032DCCA Datasheet, PDF (44/64 Pages) Samsung semiconductor – Dual Voltage MultiMediaCard Specification

MultiMediaCard^TM
Card identification and card operation conditions timing
The card identification (CMD2) and card operation conditions (CMD1) timing are processed in the open-
drain mode. The card response to the host command starts after exactly NID clock cycles.
Identification Timing (Card Identification Mode)
Last Card Response - Next Host Command Timing
After receiving the last card response, the host can start the next command transmission after at least
NRC clock cycles. This timing is relevant for any host command.
Tming Response End to Next CMD Start (Data Transfer Mode)
Last Host Command - Next Host Command Timing
After the last command has been sent, the host can continue sending the next command after at least
NCC clock periods.
Tming CMDn End to CMD n+1 Start (All Modes)
In the case the CMDn command was a last identification command (no more response sent by a card),
then the next CMDn+1 command is allowed to follow after at least Ncc+136(the length of the R2
response) clock periods.
Data Access timing
Data transmission starts with the access time delay tAC (which corresponds to NAC), beginning from the
end bit of the data address command. The data transfer stops automatically in case of a data block
transfer or by a transfer stop command.
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