Sdio I/O Card-Specific Operations; Table 132. R6 Response - ST STM32F207 Series Reference Manual

RM0033
[39:8] Argument field
[7:1]
0
26.5.8 R6
Only for SD I/O. The normal response to CMD3 by a memory device. It is shown in
Table 132.
47
46
[45:40]
[39:8] Argument
field
[7:1]
0
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
26.6

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.
Table 131. R5 response (continued)
Bit position
[31:16]
[15:0]
Bit position Width (bits)
1
1
6
[31:16] 16
[15:0] 16
7
1
Secure digital input/output interface (SDIO)
Width (bits
16 X
16 X
7 X
1 1

Table 132. R6 response

Value
0 Start bit
0 Transmission bit
'101000' CMD40
X RCA [31:16] of winning card or of the host
X Not defined. May be used for IRQ data
X CRC7
1 End bit
RM0033 Rev 9
Value Description
RCA [31:16] of winning
card or of the host
Not defined. May be used
for IRQ data
CRC7
End bit
Description
773/1381
791