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5.2.3.5. Data Response
Every data block written to the card is acknowledged by a data response token. It is one byte long and has the
following format:
The meaning of the status bits is defined as follows:
'010'—Data accepted.
'101'—Data rejected due to a CRC error.
'110'—Data Rejected due to a Write Error
In case of any error (CRC or Write Error) during Write Multiple Block operation, the host shall stop the data
transmission using CMD12. In case of Write Error (response '110') the host may send CMD13 (SEND_STATUS)
in order to get the cause of the write problem. ACMD22 can be used to find the number of well written write
blocks.
5.2.4. Data Tokens
Read and write commands have data transfers associated with them. Data is being transmitted or received via data
tokens. All data bytes are transmitted MSB.
Data tokens are 4 to 515 bytes long and have the following format:
For Single Block Read, Single Block Write and Multiple Block Read:
First byte: Start Block.
Bytes 2-513 (depends on the data block length): User data.
Last two bytes: 16-bit CRC.
For Multiple Block Write operation:
First byte of each block.
If data is to be transferred then—Start Block
If Stop transmission is requested—Stop Tran
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
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SPI Protocol Definition
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