at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 559
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at91sam9260-cj
Manufacturer Part Number
at91sam9260-cj
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9260-CJ.pdf
(790 pages)
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Figure 35-10. Read Functional Flow Diagram
Note:
6221G–ATARM–31-Jan-08
1. It is assumed that this command has been correctly sent (see
2. This field is also accessible in the MCI Block Register (MCI_BLKR).
Number of words to read = BlockLength/4
Reset the PDCMODE bit
MCI_MR &= ~PDCMODE
Set the block length (in bytes)
MCI_MR |= (BlockLenght <<16)
Set the block count (if necessary)
MCI_BLKR |= (BlockCount << 0)
Number of words to read = 0 ?
Read status register MCI_SR
Send READ_SINGLE_BLOCK
Number of words to read -1
Number of words to read =
Read data = MCI_RDR
RXRDY = 0?
No
command
Poll the bit
No
(1)
No
(2)
Send SET_BLOCKLEN command (1)
Send SELECT/DESELECT_CARD
command
Yes
Yes
RETURN
Read with PDC
(1)
to select the card
Figure
Set the PDCMODE bit
MCI_MR |= PDCMODE
Set the block length (in bytes)
MCI_BLKR |= (BlockLength << 16)
35-9).
Configure the PDC channel
MCI_RPR = Data Buffer Address
MCI_RCR = BlockLength/4
MCI_PTCR = RXTEN
Send READ_SINGLE_BLOCK
Yes
Read status register MCI_SR
command
ENDRX = 0?
Poll the bit
RETURN
No
(1)
AT91SAM9260
(2)
Yes
559
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