Техническая Спецификация для Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK
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Модели
AT91SAM9N12-EK
569
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
Figure 35-7. Command/Response Functional Flow Diagram
Note:
1. If the command is SEND_OP_COND, the CRC error flag is always present (refer to R3 response in the High Speed
MultiMedia Card specification).
RETURN OK
RETURN ERROR
(1)
RETURN OK
Set the command argument
HSMCI_ARGR = Argument
(1)
Set the command
HSMCI_CMDR = Command
Read HSMCI_SR
CMDRDY
Status error flags?
Read response if required
Yes
Wait for command
ready status flag
Check error bits in the
status register
(1)
0
1
Does the command involve
a busy indication?
No
Read HSMCI_SR
0
NOTBUSY
1