SDMJ-32 SanDisk, SDMJ-32 Datasheet - Page 42

• Manufacturer Part Number: SDMJ-32
• Manufacturer: SanDisk
• Type: MultiMedia Cardr

Specifications of SDMJ-32

• Density: 32MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): -25C
• Operating Temperature (max): 85C
• Package Type: MMC
• Mounting: Socket
• Pin Count: 7
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Programmable: Yes
• Lead Free Status / RoHS Status: Compliant

Revision 1.3
© 2005 SanDisk Corporation
4.2
Data Transfer Mode
f
to further identification cycles. The MultiMediaCard/RS-MultiMediaCard also switches
output drivers from open-drain to push-pull.
The host repeats the identification process as long as it receives a response (CID) to its
identification command (CMD2). All cards have been identified when a card does not
respond to CMD2. The time-out condition that recognizes completion is the absence of a
start bit for more than five clock periods after sending CMD2.
When all cards are in Stand-by State, communication over the CMD and DAT lines are in
push-pull mode. Until the host knows all CSD Register content, the f
remain at f
issues SEND_CSD (CMD9) to obtain the content—for example, ECC type, block length,
card storage capacity, and maximum clock rate.
Figure 4-2
CMD7 is used to select one MultiMediaCard/RS-MultiMediaCard and place it in the
Transfer State. Only one card can be in the Transfer State at a given time. If a previously
selected card is in the 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,” all cards transfer back to Stand-by State. This may be used before
identifying new cards without resetting other already registered cards. Cards that already
have an RCA do not respond to identification command flow in this state.
OD
Wait-IRQ State
. When the RCA is received, the card transfers to the Stand-by State and does not react
Any start bit
detected on
the bus
(irq)
Interrupt
Mode
OD
because some cards may have operating frequency restrictions. The host
Transfer
Mode
Identification
Data
CMD40
MultiMediaCard State Diagram—Data Transfer Mode
Mode
Card
"operation
complete"
Standby State
CMD4, 9, 10, 39
Disconnect
State (dis)
CMD3
(stby)
4-4
CMD28, 29, 38
No state transition in
data-transfer mode
CMD13, CMD55
CMD15
CMD7
CMD7
MultiMediaCard/RS-MultiMediaCard Product Manual
data-transfer mode
From all states in
Chapter 4 – MultiMediaCard Protocol Description
CMD7
CMD7
CMD0
Programming
State (prg)
"operation
complete"
CMD24,
"operation
complete"
CMD25
CMD12,
Send-data State
(data)
Transfer State
PP
Receive-data
(tran)
"transfer end"
State (rcv)
26, 27, 42, 56(w)
clock rate must
CMD12 or
CMD20, 24, 25,
CMD11 17,
18, 30, 56(r)
04/22/05
CMD16
, 23,
35, 36