Sd Status Register; Relative Card Address Register - SanDisk SDSDB-016G-A11 Product Manual

Revision 2.2
3.5.5

SD Status Register

The SD Status Register contains status bits that are related to the SD Card proprietary
features and may be used for future application specific usage. The size of the SD Status is
one data block of 512 bits. The content of this register is transmitted to the Host over the
DAT bus along with 16 bits CRC. The SD Status is sent to the host over the DAT bus if
ACMD13 is sent (CMD55 followed with CMD13). ACMD13 can be sent to a card only in
'tran_state' (card selected). The SD Status structure is listed in Table 3-30. The same
abbreviations for 'type' and 'clear condition' were used as for the Card Status above.
Table 3-30
Bits
511- DAT_BUS_WIDTH
510
509 SECURED_MODE
508-
496
495- SD_CARD_TYPE
480
479- SIZE_OF_PROTECTED_
448 AREA
447-
312
311-
0
3.5.6

Relative Card Address Register

The 16-bit Relative Card Address (RCA) Register carries the card address that is
published by the card during the card identification. This address is used for the addressed
host-card communication after the card identification procedure.
© 2004 SanDisk Corporation
SD Card Status
Identifier Type
S R
S R
S R
S R
Reserved for manufacturer
3-22
Chapter 3 – SD Card Interface Description
SD Card Product Manual
Value Description
00=1 (default) Shows the currently defined data
01=reserved bus width that was defined by the
10= 4-bit width SET_BUS_WIDTH command
11=reserved
0=not in the Card is in Secured Mode of
mode operation (refer to the SD
1=secured Security Specifications
mode document).
Reserved
'00xxh'=SD In the future, the 8 LSBs will be
Memory Cards used to define different variations
as defined in of an SD Card (each bit will
Physical Spec. define different SD types). The 8
Ver. MSBs will be used to define SD
1.01('x'=don't Cards that do not comply with
care).The the SD Memory Card as defined
following cards in the Specification Ver. 1.01
are currently
defined:'0000'
=Regular SD
RD/WR
Card.'0001'=
SD ROM Card
Size of Shows the size of the protected
protected area area. The actual area =
(in units of (SIZE_OF_PROTECTED_AREA)
MULT*BLOCK * MULT * BLOCK_LEN.
_LEN refer to
CSD register).
Reserved
Clear
Cond.
A
A
A
A
12/08/04