Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet

 710

SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

 HSMCI_SR

0xFFF80040 (0), 0xFFFD0040 (1)

 Read-only 

0 = A command is in progress.

1 = The last command has been sent. Cleared when writing in the HSMCI_CMDR.

0 = Data has not yet been received since the last read of HSMCI_RDR.

1 = Data has been received since the last read of HSMCI_RDR.

0 = The last data written in HSMCI_TDR has not yet been transferred in the Shift Register.

1 = The last data written in HSMCI_TDR has been transferred in the Shift Register.

This flag must be used only for Write Operations.

0 = A data block transfer is not yet finished. Cleared when reading the HSMCI_SR.

1 = A data block transfer has ended, including the CRC16 Status transmission.
the flag is set for each transmitted CRC Status.

Refer to the MMC or SD Specification for more details concerning the CRC Status.

0 = No data transfer in progress.

1 = The current data transfer is still in progress, including CRC16 calculation. Cleared at the end of the CRC16 calculation.

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.

31

30

29

28

27

26

25

24

UNRE

OVRE

ACKRCVE

ACKRCV

XFRDONE

FIFOEMPTY

DMADONE

BLKOVRE

23

22

21

20

19

18

17

16

CSTOE

DTOE

DCRCE

RTOE

RENDE

RCRCE

RDIRE

RINDE

15

14

13

12

11

10

9

8

–

–

CSRCV

SDIOWAIT

–

–

–

MCI_SDIOIR

QA

7

6

5

4

3

2

1

0

–

–

NOTBUSY

DTIP

BLKE

TXRDY

RXRDY

CMDRDY