MC2GH256NMCA-2SA00 SAMSUNG [Samsung semiconductor], MC2GH256NMCA-2SA00 Datasheet - Page 42

• Manufacturer Part Number: MC2GH256NMCA-2SA00
• Description: SAMSUNG MultiMediaCard
• Manufacturer: SAMSUNG [Samsung semiconductor]

When the card is in Stand-by State, communication over the CMD and DAT lines will be performed in push-pull mode.
Until the contents of the CSD register is known by the host, the f
host issues SEND_CSD (CMD9) to obtain the Card Specific Data (CSD register), e.g. block length, card storage capacity,
maximum clock rate, etc.
The broadcast command SET_DSR (CMD4) configures the driver stages of the card. It programs its DSR register corre-
sponding to the application bus layout (length) and the data transfer frequency. The clock rate is also switched from f
f
CMD7 is used to select the card and put it into the Transfer State. If the card was previously selected and was in Transfer
State its connection with the host is released and it will move back to the Stand-by State. When CMD7 is issued with the
reserved relative card address “0x0000”, the card is put back to Stand-by State. After the card is assigned an RCA it will
not respond to identification commands (CMD1, CMD2, CMD3, see Chapter 6.1.3).
PP
6.2 Data Transfer Mode
Revision 0.3
Interrupt mode
Wait-IRQ State
at that point.
Any start bit
detected on
the bus
(irq)
Card identification
mode
Data transfer
“operation
complete”
CMD40
mode
Figure 6-2 : MultiMediaCard State Diagram (Data Transfer Mode)
Disconnect
State (dis)
CMD3
Stand-by State
9,10,39
CMD4
(stby)
no state transition
in data-transfer-mode
CMD13 & CMD55
CMD15
from all states in
Data-transfer-mode
CMD7
CMD7
28, 29, 38
CMD 6,
42
CMD0
PP
“operation
Programming
State (prg)
complete”
CMD7
clock rate must remain at f
CMD7
CMD24,
25
“operation
complete”
CMD20,
24,25,26,27,42, 56(w)
CMD12,
CMD12 or
„transfer end“
Receive-data
State (rcv)
State (tran)
Transfer
Sending-data
State (data)
OD
MultiMediaCard
(see Chapter 5.4.8). The
CMD8,11,17,
18, 30, 56(r)
Sep.22.2005
CMD16,
23,35,36
Bus test
State (btst)
CMD19
CMD14
OD
TM
to