SanDisk SDSDH-1024 Product Manual - Page 85

Table 4-20, Response R2, Table 4-21, Response R3, Table 4-22, Response R6

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Revision 2.2 Chapter 4 - SD Card Protocol Description SanDisk SD Card Product Manual 2) R1b is identical to R1 with the additional busy signal transmitted on the data line. 3) R2 (CID, CSD register): response length 136 bits. The content of the CID Register is sent as a response to CMD2 and CMD10. The content of the CSD Register is sent as a response to CMD9. The only bits transferred are [127...1] of the CID and CSD; the reserved bit (0) in these registers is replaced by the end bit of the response. Table 4-20 Response R2 Bit Position 135 134 [133:128] [127:1] 0 Width (bits) 1 1 6 127 1 Value 0 0 111111 x 1 Description start bit transmission bit reserved CID or CSD register incl. internal CRC7 end bit 4) R3 (OCR Register): response length 48 bits. The contents of the OCR Register are sent as a response to CMD1. Table 4-21 Response R3 Bit Position 47 46 [45:40] [39:8] Width (bits) 1 1 6 32 Value 0 0 111111 x Description start bit transmission bit reserved OCR Register [7:1] 0 7 1 111111 1 reserved end bit R4 and R5: responses are not supported. 5) R6 (Published RCA response): response length 48 bits. Bits 45:40 indicate the response command's index; in that case it will be 000011 (together w/bit 5 in the status bits it means = CMD3. The 16 MSBs of the argument field are used for the published RCA number. Table 4-22 Response R6 Bit Position 47 46 [45:40] [39:8] [7:1] 0 Width (bits) 1 1 6 32 7 1 Value 0 0 111111 x 111111 1 Description start bit transmission bit reserved OCR Register reserved end bit © 2004 SanDisk Corporation 4-41 12/08/04

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Chapter 4 – SD Card Protocol Description
Revision 2.2
SanDisk SD Card Product Manual
© 2004 SanDisk Corporation
4-41
12/08/04
2)
R1b
is identical to R1 with the additional busy signal transmitted on the data line.
3)
R2
(CID, CSD register): response length 136 bits.
The content of the CID Register is sent as a response to CMD2 and CMD10. The content
of the CSD Register is sent as a response to CMD9. The only bits transferred are [127...1]
of the CID and CSD; the reserved bit (0) in these registers is replaced by the end bit of the
response.
Table 4-20
Response R2
Bit Position
135
134
[133:128]
[127:1]
0
Width (bits)
1
1
6
127
1
Value
0
0
111111
x
1
Description
start bit
transmission bit
reserved
CID or CSD register incl.
internal CRC7
end bit
4)
R3
(OCR Register): response length 48 bits.
The contents of the OCR Register are sent as a response to CMD1.
Table 4-21
Response R3
Bit Position
47
46
[45:40]
[39:8]
[7:1]
0
Width (bits)
1
1
6
32
7
1
Value
0
0
111111
x
111111
1
Description
start bit
transmission bit
reserved
OCR Register
reserved
end bit
R4 and R5: responses are not supported.
5) R6 (Published RCA response):
response length 48 bits.
Bits 45:40 indicate the response
command’s index; in that case it will be 000011 (together w/bit 5 in the status bits it means
= CMD3.
The 16 MSBs of the argument field are used for the published RCA number.
Table 4-22
Response R6
Bit Position
47
46
[45:40]
[39:8]
[7:1]
0
Width (bits)
1
1
6
32
7
1
Value
0
0
111111
x
111111
1
Description
start bit
transmission bit
reserved
OCR Register
reserved
end bit