AT91SAM9G10-EK Atmel, AT91SAM9G10-EK Datasheet - Page 556
AT91SAM9G10-EK
Manufacturer Part Number
AT91SAM9G10-EK
Description
KIT DEV FOR SAM9G10 ARM
Manufacturer
Atmel
Type
MCUr
Specifications of AT91SAM9G10-EK
Contents
Board, Cables, Power Supply
Silicon Manufacturer
Atmel
Core Architecture
AVR
Kit Contents
Board
Svhc
No SVHC (15-Dec-2010)
Mcu Supported Families
AT91SAM9G10, ARM926EJ-S
Tool / Board Applications
Microcontroller
Rohs Compliant
Yes
For Use With/related Products
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 556 of 730
- Download datasheet (12Mb)
6462A–ATARM–03-Jun-09
Table 35-7.
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.
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)
IOSPCMD (SDIO special command)
• Fill the argument register (MCI_ARGR) with the command argument.
• Set the command register (MCI_CMDR) (see
Fields and Values for MCI_CMDR Command Register
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)
0 (not a special command)
Table
35-7).
AT91SAM9G10
556
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