ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 936

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

936
936
SAM3X/A
SAM3X/A
The following flowchart
tiple block transfers with the DMA Controller. Polling or interrupt method can be used to wait for
the end of write according to the contents of the Interrupt Mask Register (HSMCI_IMR).
Figure 38-11. Read Multiple Block and Write Multiple Block
Notes:
1. It is assumed that this command has been correctly sent (see
2. Handle errors reported in HSMCI_SR.
READ_MULTIPLE_BLOCK command
Configure the HDMA channel X
DMAC_SADDRx and DMAC_DADDRx
DMAC_BTSIZE = BlockLength/4
Read status register DMAC_EBCISR
Send SET_BLOCKLEN command (1)
Send WRITE_MULTIPLE_BLOCK or
Send SELECT/DESELECT_CARD
(Figure
Read status register HSMCI_SR
Set the block length
HSMCI_MR |= (BlockLength << 16)
Set the DMAEN bit
HSMCI_DMA |= DMAEN
command (1) to select the card
Send STOP_TRANSMISSION
and Poll Bit FIFOEMPTY
DMAC_CHEN[X] = TRUE
and Poll Bit CBTC[X]
New Buffer ?
XFRDONE = 1
38-11) shows how to manage read multiple block and write mul-
command
RETURN
Poll the bit
No
Yes
(1)
(2)
(1)
Yes
No
Figure
38-8).
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12