Transcend Information TS4G-16GSDHC6- S5W - Manual (Page 21)

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SDHC Memory Card + Reader S5
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Defines the data status after erase, whether it is ‘0’ or ‘1’ (the status is card vendor dependent).
• SD_SECURITY
Describes the security algorithm supported by the card.
SD Supported Security Algorithm
Note that it is mandatory for a regular writable SD Memory Card to support Security Protocol. For ROM (Read Only) and
OTP (One Time Programmable) types of the SD Memory Card, the security feature is optional. In the case of Standard
Capacity SD Memory Card, this field shall be set to 2 (Version 1.01). In the case of High Capacity SD Memory Card, this
field shall be set to 3 (Version 2.00).
• SD_BUS_WIDTHS
Describes all the DAT bus widths that are supported by this card.
Since SD Memory Card shall support at least the two bus modes 1bit or 4bit width then any SD Card shall set at least
bits 0 and 2 (SD_BUS_WIDTH="0101").