Transcend Information TS4/8GUSDHC6-P3 manual Register Information, OCR register

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TS4/8GUSDHC6-P3

4/8GB microSDHC Class 6 Card + Reader P3

 

 

 

Register Information

Within the card interface six registers are defined: OCR, CID, CSD, RCA, DSR and SCR. These can be accessed only by corresponding commands (see Chapter 4.7). The OCR, CID, CSD and SCR registers carry the card/content specific information, while the RCA and DSR registers are configuration registers storing actual configuration parameters.

1. OCR register

The 32-bit operation conditions register stores the VDD voltage profile of the card. Additionally, this register includes status information bits. 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 OCR register shall be implemented by the cards. The 32-bit operation conditions register stores the VDD voltage profile of the card. Bit 7 of OCR is newly defined for Dual Voltage Card and set to 0 in default. If a Dual Voltage Card does not receive CMD8, OCR bit 7 in the response indicates 0, and the Dual Voltage Card which received CMD8, sets this bit to 1.

Additionally, this register includes 2 more status information bits. Bit 31 - Card power up status bit, this status bit is set if the card power up procedure has been finished. Bit 30 - Card capacity status bit, this status bit is set to 1 if card is High Capacity SD Memory Card. 0 indicates that the card is Standard Capacity SD Memory Card. The Card Capacity status bit is valid after the card power up procedure is completed and the card power up status bit is set to 1. The Host shall read this status bit to identify a Standard or High Capacity SD Memory Card.

The OCR register shall be implemented by the cards.

OCR Register Definition

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Contents Pin Definition Description FeaturesPlacement 8GB microSDHC Class 6 Card + Reader P3Architecture Current Consumption Power Supply VoltageBus Signal Line Load Bus Operating Conditions GeneralSingle card capacitance Parameter Symbol Min Max Unit Remark Bus Signal LevelsBus Timing Output Delay time during Data Transfer Mode Bus Timing High Speed Mode Output Hold time Reliability and Durability OCR register Register InformationPRV MIDOID PNMCRC PSNMDT CSD Register Fields CSD Version CsdstructureTranspeed TaacNsac Writeblkmisalign CCCReadbllen ReadblpartialSectorsize WpgrpenableCsize EraseblkenFileformat CopyPermwriteprotect TmpwriteprotectRCA Register Datastataftererase ScrstructureSdspec Sdbuswidths SdsecurityMechanical Description Top View Mechanical Description Bottom View Mechanical Description Keep Out Area MicroSD package Dimensions System Requirements Placement DimensionsDescription USB Pin Identification Block DiagramUSB Pinouts Parameter MIN DC CharacteristicsDC Electrical Characteristics of 3.3V I/O Recommended Operating Conditions