Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

569

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

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