Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
918
Table 37-8. 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
Ye s
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