R5 (Interrupt Request); Table 209. R5 Response - ST STM32F446 Series Reference Manual

RM0390
[39:8] Argument field
[7:1]
0
Once an SD I/O card has received a CMD5, the I/O portion of that card is enabled to
respond normally to all further commands. This I/O enable of the function within the I/O card
will remain set until a reset, power cycle or CMD52 with write to I/O reset is received by the
card. Note that an SD memory-only card may respond to a CMD5. The proper response for
a memory-only card would be Present memory = 1 and Number of I/O functions = 0. A
memory-only card built to meet the SD Memory Card specification version 1.0 would detect
the CMD5 as an illegal command and not respond. The I/O aware host will send CMD5. If
the card responds with response R4, the host determines the card's configuration based on
the data contained within the R4 response.
29.5.7

R5 (interrupt request)

Only for MultiMediaCard. Code length: 48 bits. If the response is generated by the host, the
RCA field in the argument will be 0x0.
47
46
[45:40]
[39:8] Argument field
[7:1]
0
29.5.8 R6
Only for SD I/O. The normal response to CMD3 by a memory device. It is shown in
Table 210.
Table 208. R4b response (continued)
Bit position
39
[38:36]
35
[34:32]
[31:8]
Bit position
[31:16]
[15:0]
Secure digital input/output interface (SDIO)
Width (bits
16 X
3 X
1 X
3 X
24 X
7 X
1 1

Table 209. R5 response

Width (bits
1 0
1 0
6 '101000'
16 X
16 X
7 X
1 1
RM0390 Rev 4
Value Description
Card is ready
Number of I/O functions
Present memory
Stuff bits
I/O ORC
Reserved
End bit
Value Description
Start bit
Transmission bit
CMD40
RCA [31:16] of winning
card or of the host
Not defined. May be used
for IRQ data
CRC7
End bit
1013/1328
1031