SanDisk SDSDH-1024 Product Manual - Page 76

Command Description

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Revision 2.2 Chapter 4 - SD Card Protocol Description SanDisk SD Card Product Manual 4.8.4 Class CMD 0 Basic 1 2 R Block Read 34 R Block Write CMD28 CMD29 CMD30 CMD32 CMD33 CMD3421 to CMD37 CMD38 CMD42 CMD5022 CMD52 CMD53 CMD55 CMD56 CMD5723 ACMD6 ACMD13 ACMD22 ACMD41 ACMD42 ACMD51 R = Reserved 5 Erase + + + 6 Write Protec tion + + + 7 8 Lock AppCard Specific + 9 I/O Mode + + 10 11 Switch R + + Command Description All future reserved commands and their responses must be 48 bits long. Responses may not have any response. Table 4-16 details the SD Card bus commands. Table 4-16 SD Card Bus Command Descriptions CMD Index Type Argument Resp. Abbreviation Description Basic Commands (Class 0) CMD0 CMD1 CMD2 bc [31:0] stuff bits Reserved bcr [31:0]stuff bits --- GO_IDLE_STATE R2 ALL_SEND_CID Reset all cards to Idle State. Asks all cards to send their CID numbers on the CMD line. 21This command is newly defined in SD Card Physical Description Spec. v1.10 . 22 Ibid. 23 Ibid. © 2004 SanDisk Corporation 4-32 12/08/04

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Chapter 4 – SD Card Protocol Description
Revision 2.2
SanDisk SD Card Product Manual
© 2004 SanDisk Corporation
4-32
12/08/04
Class
0
1
2
3
4
5
6
7
8
9
10
11
CMD
Basic
R
Block
Read
R
Block
Write
Erase
Write
Protec
tion
Lock
Card
App-
Specific
I/O
Mode
Switch
R
CMD28
+
CMD29
+
CMD30
+
CMD32
+
CMD33
+
CMD34
21
to
CMD37
+
CMD38
+
CMD42
+
CMD50
22
+
CMD52
+
CMD53
+
CMD55
+
CMD56
+
CMD57
23
+
ACMD6
+
ACMD13
+
ACMD22
+
ACMD41
+
ACMD42
+
ACMD51
+
R = Reserved
4.8.4
Command Description
All future reserved commands and their responses must be 48 bits long.
Responses may
not have any response.
Table 4-16 details the SD Card bus commands.
Table 4-16
SD Card Bus Command Descriptions
CMD Index
Type
Argument
Resp.
Abbreviation
Description
Basic Commands (Class 0)
CMD0
bc
[31:0] stuff
bits
---
GO_IDLE_STATE
Reset all cards to Idle
State.
CMD1
Reserved
CMD2
bcr
[31:0]stuff
bits
R2
ALL_SEND_CID
Asks all cards to send
their CID numbers on
the CMD line.
21
This command is newly defined in SD Card Physical Description Spec. v1.10 .
22
Ibid.
23
Ibid.