AT91RM9200-QI-002 Atmel, AT91RM9200-QI-002 Datasheet - Page 527

• Manufacturer Part Number: AT91RM9200-QI-002
• Description: IC ARM9 MCU 208 PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-QI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Figure 33-9. Command/Response Functional Flow Diagram
Note:
33.7.2
33.7.3
1768I–ATARM–09-Jul-09
1. If the command is SEND_OP_COND, the CRC error flag is always present (refer to R3 response in the MultiMedia Card
Data Transfer Operation
Read Operation
specification).
Check error bits in the
The MultiMedia Card allows several read/write operations (single block, multiple blocks, stream,
etc.). These kind of transfers can be selected setting the Transfer Type (TRTYP) field in the MCI
Command Register (MCI_CMDR).
These operations can be done using the features of the Peripheral DMA Controller (PDC). If the
PDCMODE bit is set in MCI_MR, then all reads and writes use the PDC facilities.
In all cases, the block length (BLKLEN field) must be defined in the mode register MCI_MR. This
field determines the size of the data block.
The following flowchart shows how to read a single block with or without use of PDC facilities. In
this example (see
Wait for command
status register
ready status flag
(1)
Figure
Set the command argument
MCI_ARGR = Argument
Read response if required
MCI_CMDR = Command
33-10), a polling method is used to wait for the end of read. Similarly,
Status error flags?
Set the command
Read MCI_SR
RETURN OK
CMDRDY
1
(1)
RETURN ERROR (1)
Yes
0
AT91RM9200
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