AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 772

• Manufacturer Part Number: AT91SAM9G45-EKES
• Description: KIT EVAL FOR AT91SAM9G45
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM9G45-EKES

• Contents: Board
• Processor To Be Evaluated: SAM9G45
• Data Bus Width: 32 bit
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 50 C
• Minimum Operating Temperature: - 10 C
• Operating Supply Voltage: 1.8 V to 3.3 V
• For Use With/related Products: AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4626953

Figure 36-9. Write Functional Flow Diagram
Note:
6438F–ATARM–21-Jun-10
1. It is assumed that this command has been correctly sent (see
2. This field is also accessible in the HSMCI Block Register (HSMCI_BLKR).
Number of words to write = BlockLength/4
Reset theDMAEN bit
HSMCI_DMA &= ~DMAEN
Set the block length (in bytes)
HSMCI_MR |= (BlockLength) <<16) (2)
Set the block count (if necessary)
HSMCI_BLKR |= (BlockCount << 0)
Read status register HSMCI_SR
Number of words to write = 0 ?
Send WRITE_SINGLE_BLOCK
HSMCI_TDR = Data to write
Number of words to write =
Number of words to write -1
No
TXRDY = 0?
command
Poll the bit
No
(1)
No
Send SET_BLOCKLEN command (1)
Send SELECT/DESELECT_CARD
command (1) to select the card
Yes
Yes
Write using DMAC
RETURN
Figure
Configure the DMA channel X
DMAC_DADDRX = Data Address to write
DMAC_BTSIZE = BlockLength/4
Set the DMAEN bit
HSMCI_DMA |= DMAEN
Set the block length (in bytes)
HSMCI_BLKR |= (BlockLength << 16)
Yes
36-7).
Send WRITE_SINGLE_BLOCK
Read status register MCI_SR
DMAC_CHEN[X] = TRUE
XFRDONE = 0?
command (1)
Poll the bit
RETURN
No
AT91SAM9G45
(2)
Yes
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