DocID018909 Rev 11
RM0090
Secure digital input/output interface (SDIO)
1067
31.5.8 R6
Only for SD I/O. The normal response to CMD3 by a memory device. It is shown in
.
The card [23:8] status bits are changed when CMD3 is sent to an I/O-only card. In this case,
the 16 bits of response are the SD I/O-only values:
•
Bit [15] COM_CRC_ERROR
•
Bit [14] ILLEGAL_COMMAND
•
Bit [13] ERROR
•
Bits [12:0] Reserved
31.6
SDIO I/O card-specific operations
The following features are SD I/O-specific operations:
•
SDIO read wait operation by SDIO_D2 signalling
•
SDIO read wait operation by stopping the clock
•
SDIO suspend/resume operation (write and read suspend)
•
SDIO interrupts
The SDIO supports these operations only if the SDIO_DCTRL[11] bit is set, except for read
suspend that does not need specific hardware implementation.
[39:8] Argument field
[31:16]
16
X
RCA [31:16] of winning
card or of the host
[15:0]
16
X
Not defined. May be used
for IRQ data
[7:1]
7
X
CRC7
0
1
1
End bit
Table 177. R5 response (continued)
Bit position
Width (bits
Value
Description
Table 178. R6 response
Bit position
Width (bits)
Value
Description
47
1
0
Start bit
46
1
0
Transmission bit
[45:40]
6
‘101000’ CMD40
[39:8] Argument
field
[31:16]
16
X
RCA [31:16] of winning card or of the host
[15:0]
16
X
Not defined. May be used for IRQ data
[7:1]
7
X
CRC7
0
1
1
End bit
