SanDisk SDSDH-1024 Product Manual - Page 22

Table 3-2, SD Card Registers, SD Card Architecture

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Revision 2.2 Chapter 3 - SD Card Interface Description SD Card Product Manual Each card has a set of information registers (refer to Table 3-3). Detailed descriptions are provided in Section 3.5. Table 3-2 SD Card Registers Name CID RCA6 CSD SCR OCR Width 128 16 128 64 32 Description Card identification number: individual card number for identification. Relative card address: local system address of a card, dynamically suggested by the card and approved by the host during initialization. Card specific data: information about the card operation conditions. SD Configuration Register: information about the SD Card's special features capabilities. Operation Condition Register The host may reset the cards by switching the power supply off and on again. The card has its own power-on detection circuitry that puts the card into an idle state after the power-on. The GO_IDLE (CMD0) command can also reset the card. Figure 3-1 SD Card Architecture 6 The RCA Register is not available in SPI mode. © 2004 SanDisk Corporation 3-2 12/08/04

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Chapter 3 – SD Card Interface Description
Revision 2.2
SD Card Product Manual
© 2004 SanDisk Corporation
3-2
12/08/04
Each card has a set of information registers (refer to Table 3-3). Detailed descriptions are
provided in Section 3.5.
Table 3-2
SD Card Registers
Name
Width
Description
CID
128
Card identification number: individual card number for identification.
RCA
6
16
Relative card address: local system address of a card, dynamically
suggested by the card and approved by the host during initialization.
CSD
128
Card specific data: information about the card operation conditions.
SCR
64
SD Configuration Register: information about the SD Card’s special
features capabilities.
OCR
32
Operation Condition Register
The host may reset the cards by switching the power supply off and on again. The card has
its own power-on detection circuitry that puts the card into an idle state after the power-on.
The GO_IDLE (CMD0) command can also reset the card.
Figure 3-1
SD Card Architecture
6
The RCA Register is not available in SPI mode.