User manual

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High Capacity microSD Class10 Card
Transcend Information Inc.
22
(5) Speed Class shall be supported (SDHC or SDXC)
A card supports any of following functions shall satisfy essential conditions of Version 3.00 Card
(1) Speed Class supported under the conditions defined in Ver3.00
(2) UHS-I supported card
(3) CMD23 supported card
Application Notes:
When checking SD_SPEC version in SCR, the host shall not forget that higher SD_SPEC version may be
specified in future. It is important to keep compatibility for future version.
• DATA_STAT_AFTER_ERASE
Defines the data status after erase, whether it is ‘0’ or ‘1’ (the status is card vendor dependent).
• SD_SECURITY
This field indicates CPRM Security Specification Version for each capacity card. The definition of
Protected Area
is different in each capacity card.
SD_SECURITY CPRM Security Version
0 No Security
1 Not Used
2 SDSC Card (Security Version 1.01)
3 SDHC Card (Security Version 2.00)
4 SDXC Card (Security Version 3.xx)
5 - 7 Reserved
CPRM Security Version
The basic rule of setting this field:
SDSC Card sets this field to 2 (Version 1.01)
SDHC Card sets this field to 3 (Version 2.00).
SDXC Card sets this field to 4 (Version 3.xx).
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.