MC56U032NCFA Samsung Semiconductor, Inc., MC56U032NCFA Datasheet - Page 64

• Manufacturer Part Number: MC56U032NCFA
• Description: Flash Card
• Manufacturer: Samsung Semiconductor, Inc.

• Single Block Write
The host may deselect a card (by raising the CS) at any time during the card busy period (refer to the
given timing diagram). 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 cycle after the falling edge of CS.
• Multiple Block Write
The timimg behaviour of the multiple block write transaction starting from the comamnd up to the first
data block is identical to the single block write. Figure 63 describes the timing between the data blocks of
a multiple block write transaction. Timing of the ‘Stop Tran’ token is identical to a standard data block.
After the “Stop Tran” token is received ny the card, the data on the DataOut line is undefined for one byte
(NBR), after which a Busy token may apear. The host may deselect and reselect the card during every
busy period between the data blocks. Timing for toggling the CS signal is identical to the Single block
write transaction.
Timing Values
MultiMediaCard
Figure 4-20 Timing diagram: Read CSD register
Figure 4-20 Timing Diagram: Single Block Write
Figure 4-21
NCS
NCR
NCX
NAC
NRC
NWR
NEC
TM
Timing Diagram: Multiple Block Write
Min
0
1
0
1
1
1
0
Max
8
8
8
(10/8)*(TAAC*Fo
p+100*NSAC)
8
8
8
Unit
8Clock cycles
8Clock cycles
8Clock cycles
8Clock cycles
8Clock cycles
8Clock cycles
8Clock cycles
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