HB288064MM1 Datasheet, PDF (58/79 Pages) Hitachi Semiconductor – MultiMediaCard 64 MByte

HB288064MM1
Responses
There are several types of response tokens. As in the MultiMediaCard mode, all are transmitted MSB first:
• Format R1
This response token is sent by the card after every command with the exception of SEND_STATUS
commands. It is one byte long, and the MSB is always set to zero. The other bits are error indications, an
error being signaled by a ‘1’. The structure of the R1 format is given in Figure “R1 Response Format”.
The meaning of the flags is defined as following:
• In idle state: The card is in idle state and running the initializing process.
• Erase reset: An erase sequence was cleared before executing because an out of erase sequence
command was received.
• Illegal command: An illegal command code was detected.
• Communication CRC error: The CRC check of the last command failed.
• Erase sequence error: An error in the sequence of erase commands occurred.
• Address error: A misaligned address, which did not match the block length, was used in the
command.
• Parameter error: The command’s argument (e.g. address, block length) was out of the allowed
range for this card.
7
0
0
in idle state
erase reset
illegal command
com crc error
erase sequence error
address error
parameter error
R1 Response Format
• Format R1b
This response token is identical to the R1 format with the optional addition of the busy signal. The busy
signal token can be any number of bytes. A zero value indicates card is busy. A non-zero value indicates
the card is ready for the next command.
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