AT91RM9200-QI-002 Atmel, AT91RM9200-QI-002 Datasheet - Page 526

• 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: -

1768I–ATARM–09-Jul-09
The two bus modes (open drain and push/pull) needed to process all the operations are defined
in the MCI command register. The MCI_CMDR allows a command to be carried out.
For example, to perform an ALL_SEND_CID command:
The command ALL_SEND_CID and the fields and values for the MCI_CMDR Control Register
are described in
Table 33-4.
Note:
Table 33-5.
The MCI_ARGR contains the argument field of the command.
To send a command, the user must perform the following steps:
The command is sent immediately after writing the command register. The status bit CMDRDY
in the status register (MCI_SR) is asserted when the command is completed. If the command
requires a response, it can be read in the MCI response register (MCI_RSPR). The response
size can be from 48 bits up to 136 bits depending on the command. The MCI embeds an error
detection to prevent any corrupted data during the transfer.
The following flowchart shows how to send a command to the card and read the response if
needed. In this example, the status register bits are polled but setting the appropriate bits in the
interrupt enable register (MCI_IER) allows using an interrupt method.
CMD
CMD Index
CMD2
Field
CMDNB (command number)
RSPTYP (response type)
SPCMD (special command)
OPCMD (open drain command)
MAXLAT (max latency for command to
response)
TRCMD (transfer command)
TRDIR (transfer direction)
TRTYP (transfer type)
• Fill the argument register (MCI_ARGR) with the command argument.
• Set the command register (MCI_CMDR) (see
bcr means broadcast command with response.
S
T
ALL_SEND_CID Command Description
Fields and Values for MCI_CMDR Command Register
Type
bcr
Host Command
Table 33-4
Content
Argument
[31:0] stuff bits
CRC
and
Table
E
Z
33-5.
N
Resp
R2
ID
******
Cycles
Value
2 (CMD2)
2 (R2: 136 bits response)
0 (not a special command)
1
0 (NID cycles ==> 5 cycles)
0 (No transfer)
X (available only in transfer command)
X (available only in transfer command)
Abbreviation
ALL_SEND_CID
Table
Z
S
33-5).
T
Content
CID
Command
Description
Asks all cards to
send their CID
numbers on the
CMD line
AT91RM9200
Z
Z
Z
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