Datasheet

6. SCR Register
In addition to the CSD register there is another configuration register that named - SD CARD Configuration Register
(SCR). SCR provides information on SD Memory Card's special features that were configured into the given card. The size
of SCR register is 64 bit. This register shall be set in the factory by the SD Memory Card manufacturer.
The following table describes the SCR register content.
Description
Field
Width
Cell
Type
SCR
Slice
SCR Structure
SCR_STRUCTURE
4
R
[63:60]
SD Memory Card - Spec. Version
SD_SPEC
4
R
[59:56]
data_status_after erases
DATA_STAT_AFTER_ERASE
1
R
[55]
CPRM Security Support
SD_SECURITY
3
R
[54:52]
DAT Bus widths supported
SD_BUS_WIDTHS
4
R
[51:48]
Spec. Version 3.00 or higher
SD_SPEC3
1
R
[47]
Extended Security Support
EX_ SECURITY
4
R
[46:43]
Reserved
-
9
R
[42:34]
Command Support bits
CMD_SUPPORT
2
R
[33:32]
reserved for manufacturer usage
-
32
R
[31:0]
The SCR Fields
SCR_STRUCTURE
Version number of the related SCR structure in the SD Memory Card Physical Layer Specification.
SCR_STRUCTURE
SCR structure version
SD Physical Layer Specification Version
0
SCR version 1.0
Version 1.01-3.00
1-15
reserved
SCR Register Structure Version