AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 770

• Manufacturer Part Number: AT91SAM9G45-CU-999
• Description: IC MCU ARM9 APMC 324TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9G45-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 400MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: ROM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 1.1 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 324-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Figure 36-8. Read 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 read = BlockLength/4
Reset the DMAEN bit
MCI_DMA &= ~DMAEN
Set the block length (in bytes)
HSMCI_MR l= (BlockLength<<16) (2)
Set the block count (if neccessary)
HSMCI_BLKR l= (BlockCount<<0)
Read status register HSMCI_SR
Number of words to read = 0 ?
Send READ_SINGLE_BLOCK
Number of words to read -1
Number of words to read =
Read data = HSMCI_RDR
RXRDY = 0?
No
command (1)
Poll the bit
No
No
Send SET_BLOCKLEN command (1)
Send SELECT/DESELECT_CARD
command
Yes
Yes
RETURN
Read with DMAC
(1)
to select the card
Figure
36-7).
Set the DMAEN bit
HSMCI_DMA |= DMAEN
Set the block length (in bytes)
HSMCI_BLKR |= (BlockLength << 16)
Configure the DMA channel X
DMAC_SADDRX = Data Address
DMAC_BTSIZE = BlockLength/4
DMACHEN[X] = TRUE
Send READ_SINGLE_BLOCK
Read status register HSMCI_SR
Yes
command
XFRDONE = 0?
Poll the bit
RETURN
No
(1)
AT91SAM9G45
(2)
Yes
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