User manual

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High Capacity microSD Class10 Card
Transcend Information Inc.
20
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 [55:55]
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 14 R [33:32]
reserved for manufacturer usage - 32 R [31:0]
• SCR_STRUCTURE
Version number of the related SCR structure in the SD Memory Card Physical Layer Specification.
SCR_STR
U
CTURE
S
CR struct
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re version
SD
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pecification
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ersion
0 SCR version 1.0 Version 1.01-3.00
1-15 reserved
SCR Register Structure Version