Datasheet

821
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
Figure 37-10.Multiple Write Functional Flow Diagram
Note: 1. It is assumed that this command has been correctly sent (see Figure 37-7).
Send SELECT/DESELECT_CARD
command
(1)
to select the card
Send SET_BLOCKLEN command
(1)
Set the PDCMODE bit
HSMCI_MR = PDCMODE
Set the block length
HSMCI_MR = (BlockLength 16)
Configure the PDC channel
HSMCI_TPR = Data Buffer Address
HSMCI_TCR = BlockLength/4
Send WRITE_MULTIPLE_BLOCK
command
(1)
Read status register HSMCI_SR
Poll the bit
BLKE = 0
Ye s
No
HSMCI_PTCR = TXTEN
Poll the bit
NOTBUSY = 0
Ye s
RETURN
No
Send STOP_TRANSMISSION
command
(1)