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MC2DU016HBCB-0QC00 Scheda tecnica(PDF) 57 Page - Samsung semiconductor |
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MC2DU016HBCB-0QC00 Scheda tecnica(HTML) 57 Page - Samsung semiconductor |
57 / 66 page MultiMediaCard TM 57 4.10.12 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. Figure 4-9 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. Format R2 This response token is two bytes long and sent as a response to the SEND_STATUS command. The format is given in Figure “R2 Response Format”. |
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