Datasheet

757
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
The following flowchart shows how to manage a multiple write block transfer with the PDC (see Figure 39-12).
Polling or interrupt method can be used to wait for the end of write according to the contents of the Interrupt Mask
Register (MCI_IMR).
Figure 39-12. Multiple Write Functional Flow Diagram
Note: 1. It is assumed that this command has been correctly sent (see Figure 39-9).
2. This field is also accessible in the MCI Block Register (MCI_BLKR).
Configure the PDC channel
MCI_TPR = Data Buffer Address to write
MCI_TCR = BlockLength/4
Send WRITE_MULTIPLE_BLOCK
command
(1)
Read status register MCI_SR
Poll the bit
BLKE = 0?
Ye s
MCI_PTCR = TXTEN
Set the PDCMODE bit
MCI_MR |= PDCMODE
Set the block length (in bytes)
MCI_MR |= (BlockLength << 16)
(2)
Set the block count (if necessary)
MCI_BLKR |= (BlockCount << 0)
No
Poll the bit
NOTBUSY = 0?
Ye s
RETURN
No
Send STOP_TRANSMISSION
command
(1)
Send SELECT/DESELECT_CARD
command
(1)
to select the card
Send SET_BLOCKLEN command
(1)