Specifications

©Copyright 2001-2013 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 4.10
168
7.3.1.4 Card Operation for CMD8 in SPI mode
In SPI mode, the card always returns response. Table 7-5 shows the card operation for CMD8.
Command Argument Check
Response of Card *1
Index
Reserved
VHS
Pattern
CRC
R1
Reserved
VCA
Pattern
=8
Don't Care Don't Care Don't Care
Error
09h
(R1 only)
Not 8
Don't Care Don't Care Don't Care
Don't Care
Depends on command index
=8
Don't Care
Mismatch *2
Don't Care
Correct
01h
0
0
Echo Back
=8
Don't Care
Match *2
Don't Care
Correct
01h
0
Echo Back
Echo Back
*1: Response indicates the actual response that the card returns. (It does not include errors during transfer response.)
*2: 'Match' means AND of following condition a) and b). 'Mismatch' is other cases.
a) Only 1 bit is set to '1' in VHS.
b) The card supports the host supply voltage.
Table 7-5: Card Operation for CMD8 in SPI Mode