Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
602
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
35.14.12 HSMCI Status Register
Name: HSMCI_SR
Address:
0xF0008040
Access: Read-only
• CMDRDY: Command Ready
0: A command is in progress.
1: The last command has been sent. Cleared when writing in the HSMCI_CMDR.
• RXRDY: Receiver Ready
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.
• TXRDY: Transmit Ready
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.
• BLKE: Data Block Ended
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.
the flag is set for each transmitted CRC Status.
Refer to the MMC or SD Specification for more details concerning the CRC Status.
• DTIP: Data Transfer in Progress
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.
• NOTBUSY: HSMCI Not Busy
A block write operation uses a simple busy signalling of the write operation duration on the data (DAT0) line: during a data trans-
fer 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.
fer 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.
Refer to the MMC or SD Specification for more details concerning the busy behavior.
For all the read operations, the NOTBUSY flag is cleared at the end of the host command.
For the Infinite Read Multiple Blocks, the NOTBUSY flag is set at the end of the STOP_TRANSMISSION host command
(CMD12).
For the Infinite Read Multiple Blocks, the NOTBUSY flag is set at the end of the STOP_TRANSMISSION host command
(CMD12).
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
–
–
–
SDIOIRQA
7
6
5
4
3
2
1
0
–
–
NOTBUSY
DTIP
BLKE
TXRDY
RXRDY
CMDRDY