Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
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• NOTBUSY: HSMCI Not Busy
This flag must be used only for Write Operations.
A block write operation uses a simple busy signalling of the write operation duration on the data (DAT0) line: during a data
transfer block, if the card does not have a free data receive buffer, the card indicates this condition by pulling down the data
line (DAT0) to LOW. The card stops pulling down the data line as soon as at least one receive buffer for the defined data
transfer block length becomes free.
The NOTBUSY flag allows to deal with these different states.
0: The HSMCI is not ready for new data transfer. Cleared at the end of the card response.
1: The HSMCI is ready for new data transfer. Set when the busy state on the data line has ended. This corresponds to a
free internal data receive buffer of the card.
Refer to the MMC or SD Specification for more details concerning the busy behavior.
• SDIOIRQA: SDIO Interrupt for Slot A
0: No interrupt detected on SDIO Slot A.
1: An SDIO Interrupt on Slot A occurred. Cleared when reading the HSMCI_SR.
• SDIOIRQB: SDIO Interrupt for Slot B
0: No interrupt detected on SDIO Slot B.
1: An SDIO Interrupt on Slot B occurred. Cleared when reading the HSMCI_SR.
• SDIOWAIT: SDIO Read Wait Operation Status
0: Normal Bus operation.
1: The data bus has entered IO wait state.
• CSRCV: CE-ATA Completion Signal Received
0: No completion signal received since last status read operation.
1: The device has issued a command completion signal on the command line. Cleared by reading in the HSMCI_SR
register.
• RINDE: Response Index Error
0: No error.
1: A mismatch is detected between the command index sent and the response index received. Cleared when writing in the
HSMCI_CMDR.
• RDIRE: Response Direction Error
0: No error.
1: The direction bit from card to host in the response has not been detected.
• RCRCE: Response CRC Error
0: No error.
1: A CRC7 error has been detected in the response. Cleared when writing in the HSMCI_CMDR.
• RENDE: Response End Bit Error
0: No error.
1: The end bit of the response has not been detected. Cleared when writing in the HSMCI_CMDR.