User manual TRANSCEND TS8GJFV95D

[. . . ] OCR register The 32-bit operation conditions register stores the VDD voltage profile of the card. One status bit is set if the card power up procedure has been finished. This register includes another status bit indicating the card capacity status after set power up status bit. The 32-bit operation conditions register stores the VDD voltage profile of the card. [. . . ] The OCR register shall be implemented by the cards. OCR Register Definition Transcend Information Inc. 11 TS4~16GUSDHC6-P3 TS4~16GUSDHC6-P3 4~16 GB microSDHC Class 6 Card + Reader P3 1) This bit is valid only when the card power up status bit is set. 2) This bit is set to LOW if the card has not finished the power up routine. A voltage range is not supported if the corresponding bit value is set to LOW. As long as the card is busy, the corresponding bit (31) is set to LOW. 2. CID Register The Card IDentification (CID) register is 128 bits wide. It contains the card identification information used during the card identification phase. Every individual flash card shall have a unique identification number. The structure of the CID register is defined in the following paragraphs: · MID An 8-bit binary number that identifies the card manufacturer. The MID number is controlled, defined, and allocated to a SD Memory Card manufacturer by the SD-3C, LLC. This procedure is established to ensure uniqueness of the CID register. · OID A 2-character ASCII string that identifies the card OEM and/or the card contents (when used as a distribution media either on ROM or FLASH cards). The OID number is controlled, defined, and allocated to a SD Memory Card manufacturer by the SD-3C, LLC. The COPY bit for OTP and MTPdevices, sold to end consumers, is set to `1' which identifies the card contents as a copy. The COPY bit is an one time programmable bit. · PERM_WRITE_PROTECT Permanently protects the whole card content against overwriting or erasing (all write and erase commands for this card are permanently disabled). not permanently write protected. · TMP_WRITE_PROTECT Temporarily protects the whole card content from being overwritten or erased (all write and erase commands for this card are temporarily disabled). Host should not use this field. · CRC The CRC field carries the check sum for the CSD contents. The checksum has to be recalculated by the host for any CSD modification. The following table lists the correspondence between the CSD entries and the command classes. A `+' entry indicates that the CSD field affects the commands of the related command class. Transcend Information Inc. 18 TS4~16GUSDHC6-P3 TS4~16GUSDHC6-P3 4~16 GB microSDHC Class 6 Card + Reader P3 4. RCA Register The writable 16-bit relative card address 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. The value0x0000 is reserved to set all cards into the Stand-by State with CMD7. 5. DSR Register (Optional) The 16-bit driver stage register is described in detail in Chapter 6. 5. [. . . ] This register shall be set in the factory by the SD Memory Card manufacturer. The following table describes the SCR register content. · SCR_STRUCTURE Version number of the related SCR structure in the SD Memory Card Physical Layer Specification. SCR Register Structure Version · SD_SPEC Describes the SD Memory Card Physical Layer Specification version supported by this card. SD_SPEC 0 1 2 3-15 Physical Layer Specification Version Number Version 1. 0-1. 01 Version 1. 10 Version 2. 00 reserved Physical Layer Specification Version · DATA_STAT_AFTER_ERASE Transcend Information Inc. 20 TS4~16GUSDHC6-P3 TS4~16GUSDHC6-P3 4~16 GB microSDHC Class 6 Card + Reader P3 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. [. . . ]