SMS02GDFB5E NUMONYX, SMS02GDFB5E Datasheet - Page 15

• Manufacturer Part Number: SMS02GDFB5E
• Description: MICROSD CARD SMS 2GB FLASH MEM
• Manufacturer: NUMONYX

Specifications of SMS02GDFB5E

• Memory Size: 2GB
• Memory Type: SD (Secure Digital)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SMSxxxDF
Figure 5.
Figure 6.
CMD
from host
to card
DAT
CMD
DAT
Data transfer can be configured by the host to use single or multiple data lines (provided that
the card supports this feature).
A busy signal on DAT0 is used to indicate that a block write operation is ongoing (see
Figure 7: (Multiple) block write
the number of data lines used to transfer the data.
Response tokens (see
depending on their content. The token length is either 48 or 136 bits (see SD memory card
specification, chapters 4.7 and 4.9, for detailed definitions of the commands and
responses). The CRC protection algorithm for data block is a 16-bit CCITT polynomial (see
SD memory card specification, chapter 4.5).
On the CMD line, the MSB bit is transmitted first and the LSB bit last. When the wide bus
option is used, the data is transferred 4 bits at a time (refer to
and CRC bits, are transmitted on all the DAT lines used. CRC bits are calculated and
checked for every DAT line individually. The CRC status response and busy indication are
sent by the card to the host on DAT0 only (DAT1-DAT3 are don’t care).
‘No response’ and ‘no data’ operations
(Multiple) block read operation
from host
to card
Command
Block read operation
Command
(no response)
Operation
Response
Data block CRC
Multiple block read operation
Figure 9: Response token
from card
to host
from host
to card
operation). The same busy signaling is used regardless of
Data block CRC
Command
Data from
card to host
Operation
(no data)
format) have four coding schemes
Data block CRC
Secure digital memory card interface
Response
STOP_TRANSMISSION command
Command
from card
stops data transfer
Figure
to host
Data stop operation
10). Start bits, end bits
Response
ai10031
ai10032
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