MC56U032NCFA Samsung Semiconductor, Inc., MC56U032NCFA Datasheet - Page 11

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

2.7
2.7.1 Negotiating Operation Conditions
2.7.2 Card Acquisition and Identification
2.7.3 Card Status
2.7.4 Memory Array Partitioning
2.7.5 Read and Write Operations
2.7.6 Data Transfer Rate
2.7.7 Data Protection in the MultiMediaCard
2.7.8 Erase
MultiMediaCard
The host can read the CSD register and alter the host controlled data bytes using the SEND_CSD and
PROGRAM_CSD commands.
The SPI mode is a secondary (optional) communication protocol offered for MultiMediaCard. This
mode is a subset of the MultiMediaCard protocol, designed to communicate with an SPI channel,
commonly found in Motorola’s (and lately a few other vendors’) microcontrollers.
The operating condition negotiation function of the MultiMediaCard bus is not supported in SPI mode.
The host must work within the valid voltage range (2.7 to 3.6 volts) of the card.
The card acquisition and identification function of the MultiMediaCard bus is not supported in SPI mode.
The host must know the number of cards currently connected on the bus. Specific card selection is
done via the CS signal.
In SPI mode only 16 bits (containing the errors relevant to SPI mode) can be read out of the
MultiMediaCard status register.
Memory partitioning in SPI mode is equivalent to MultiMediaCard mode. All read and write commands
are byte addressable.
In SPI mode, only single block read/write mode is supported.
In SPI mode only block mode is supported. The typical access time (latency) for each data block, in
read operation, is 1.5mS. The write typical access time (latency) for each data block, in read operation,
is 1.5mS. The write block operation is done in handshake mode. The card will keep DataOut line low
as long as the write operation is in progress and there are no write buffers available.
Same as for the MultiMediaCard mode.
Same as in MultiMediaCard mode
SPI Mode
TM
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