AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 781
AT91SAM9G45-CU-999
Manufacturer Part Number
AT91SAM9G45-CU-999
Description
IC MCU ARM9 APMC 324TFBGA
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM9G45-EKES.pdf
(1218 pages)
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
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Manufacturer
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36.8.8.2
6438F–ATARM–21-Jun-10
Block Length is Not Multiple of 4. (ROPT field in HSMCI_DMA register set to 0)
Two DMA Transfer descriptors are used to perform the HSMCI block transfer.
8. Poll CBTC[x] bit in the DMAC_EBCISR Register.
9. If a new list of buffer shall be transferred repeat step 6. Check and handle HSMCI
10. Poll FIFOEMPTY field in the HSMCI_SR.
11. Send The STOP_TRANSMISSION command writing the HSMCI_ARG then the
12. Wait for XFRDONE in HSMCI_SR register.
1. Use the previous step to configure the HSMCI to perform a READ_MULTIPLE_BLOCK
2. Issue a READ_MULTIPLE_BLOCK command.
3. Program the DMA Controller to use a list of descriptors.
h. Program LLI_W(n).DMAC_CFGx register for channel x with the following field’s
i.
j.
k. Program DMAC_DSCRx register for channel x with the address of LLI_W(0).
l.
errors.
HSMCI_CMDR.
command.
a. Read the channel register to choose an available (disabled) channel.
b. Clear any pending interrupts on the channel from the previous DMAC transfer by
c. For every block of data repeat the following procedure:
d. Program the channel registers in the Memory for the first descriptor. This descriptor
e. The LLI_W(n).DMAC_SADDRx field in memory must be set with the starting
f.
g. Program LLI_W(n).DMAC_CTRLAx with the following field’s values:
values:
–FIFOCFG defines the watermark of the DMA channel FIFO.
–DST_REP is set to zero. Addresses are contiguous.
–SRC_H2SEL is set to true to enable hardware handshaking on the destination.
–SRC_PER is programmed with the hardware handshaking ID of the targeted
Program LLI_W(n).DMAC_DSCRx with the address of LLI_W(n+1) descriptor. And
set the DSCRx_IF to the AHB Layer ID. This operation actually links descriptors
together. If LLI_W(n) is the last descriptor then LLI_W(n).DMAC_DSCRx points to
0.
Program DMAC_CTRLBx register for channel x with 0. its content is updated with
the LLI Fetch operation.
Enable Channel x writing one to DMAC_CHER[x]. The DMA is ready and waiting
for request.
reading the DMAC_EBCISR register.
will be word oriented. This descriptor is referred to as LLI_W(n) standing for LLI
word oriented transfer for block n.
address of the HSMCI_FIFO address.
The LLI_W(n).DMAC_DADDRx field in the memory must be word aligned.
–DST_WIDTH is set to WORD.
–SRC_WIDTH is set to WORD.
–SCSIZE must be set according to the value of HSMCI_DMA, CHKSIZE field.
–BTSIZE is programmed with block_length/4. If BTSIZE is zero, this descriptor is
HSMCI Host Controller.
skipped later.
AT91SAM9G45
781
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