HB28K032MM3 Datasheet, PDF (57/91 Pages) Renesas Technology Corp – MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte

HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
Data in
from
host
to card
command
from
card
to host
data from
host
to card
data block
data
response and
busy from
card
new command
from host
command
Data out
response
data_response busy
Single Block Write Operation
After a data block has been received, the card will respond with a data-response token. If the data block
has been received without errors, it will be programmed. As long as the card is busy programming, a
continuous stream of busy tokens will be sent to the host (effectively holding the DataOut line low).
In Multiple Block write operation the stop transmission will be done by sending ‘Stop Tran’ token instead
of ‘Start Block’ token at the beginning of the next block.
Data in
from
host
to card
command
from
card
to host
Start
Block
Token
data from
host
to card
data block
data
response and
busy from
card
data from
host
to card
data block
Stop
Tran
Token
Data out
response
data
response
busy
resdpaotanse ^{busy busy}
Multiple Block Write Operation
Two types of multiple block write transactions, identical to the multiple block read, are defined (the host
can use either one at any time):
• Open-ended Multiple block write
The number of blocks for the write multiple block operation is not defined. The card will
continuously accept and program data blocks until a ‘Stop Tran’ token is received.
• Multiple block write with pre-defined block count
The card will accept the requested number of data blocks and terminate the transaction. ‘Stop Tran’
token is not required at the end of this type of multiple block write, unless terminated with an error.
In order to start a multiple block write with pre-defined block count, the host must use the
SET_BLOCK_COUNT command (CMD23) immediately preceding the
WRITE_MULTIPLE_BLOCK (CMD25) command. Otherwise the card will start an open-ended
multiple block write which can be stopped using the ‘Stop Tran’ token.
The host can abort writing at any time, within a multiple block operation, regardless of the its type.
Transaction abort is done by sending the ‘Stop Tran’ token. If a multiple block write with predefined
block count is aborted, the data in the remaining blocks is not defined.
If the card detects a CRC error or a programming error (e.g. write protect violation, out of range, address
misalignment, internal error, etc.) during a multiple block write operation (both types) it will report the
Rev.0.02, Sep.15.2004, page 57 of 89