AT91SAM9261_14 Datasheet, PDF (560/749 Pages) ATMEL Corporation – DSP Instruction Extensions

AT91SAM9261
35.9.6 MCI Command Register
Name:
MCI_CMDR
Address: 0xFFFA8014
Access Type: Write-only
31
30
29
–
–
–
23
22
21
–
–
–
15
14
13
–
–
–
7
6
5
RSPTYP
28
27
26
–
–
–
20
19
TRTYP
18
TRDIR
12
11
10
MAXLAT
OPDCMD
4
3
2
CMDNB
25
24
–
–
17
16
TRCMD
9
8
SPCMD
1
0
This register is write-protected while CMDRDY is 0 in MCI_SR. If an Interrupt command is sent, this register is only write-
able by an interrupt response (field SPCMD). This means that the current command execution cannot be interrupted or
modified.
• CMDNB: Command Number
MultiMedia Card bus command numbers are defined in the MultiMedia Card specification.
• RSPTYP: Response Type
RSP
0
0
0
1
1
0
1
1
• SPCMD: Special Command
Response Type
No response.
48-bit response.
136-bit response.
Reserved.
SPCMD
Command
0
0
0
Not a special CMD.
Initialization CMD:
0
0
1
74 clock cycles for initialization sequence.
Synchronized CMD:
0
1
0
Wait for the end of the current data block transfer before sending the
pending command.
0
1
1
Reserved.
Interrupt command:
1
0
0
Corresponds to the Interrupt Mode (CMD40).
Interrupt response:
1
0
1
Corresponds to the Interrupt Mode (CMD40).
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