SAM3SD8C Atmel Corporation, SAM3SD8C Datasheet - Page 857

• Manufacturer Part Number: SAM3SD8C
• Manufacturer: Atmel Corporation

34.14.12 HSMCI Status Register
Name:
Address:
Access:
• 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.
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
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.
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
TXBUFE
CSTOE
ENDTX
UNRE
31
23
15
7
RXBUFF
ENDRX
OVRE
DTOE
30
22
14
HSMCI_SR
0x40000040
Read-only
6
ACKRCVE
NOTBUSY
DCRCE
CSRCV
29
21
13
5
SDIOWAIT
ACKRCV
RTOE
DTIP
28
20
12
4
XFRDONE
RENDE
BLKE
27
19
11
–
3
FIFOEMPTY
RCRCE
TXRDY
26
18
10
–
2
RXRDY
RDIRE
SAM3S8/SD8
SAM3S8/SD8
25
17
–
9
–
1
SDIOIRQA
CMDRDY
RINDE
24
16
–
8
0
857
857