Transcend Information miniSDHC Card Series Csize, Eraseblken, Sectorsize, Wpgrpsize, Wpgrpenable

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miniSDHC Card series

4GB High Capacity miniSD Card

•C_SIZE

This field is expanded to 22 bits and can indicate up to 2 TBytes (It is the same as the maximum memory space specified by a 32-bit block address.)

This parameter is used to calculate the user data area capacity in the SD memory card (not include the protected area). The user data area capacity is calculated from C_SIZE as follows: memory capacity = (C_SIZE+1) * 512K byte

As the maximum capacity of the Physical Layer Specification Version 2.00 is 32 GB, the upper 6 bits of this field shall be set to 0.

•ERASE_BLK_EN

This field is fixed to 1, which means the host can erase one or multiple units of 512 bytes.

•SECTOR_SIZE

This field is fixed to 7Fh, which indicates 64 KBytes. This value does not relate to erase operation. Version 2.00 cards indicates memory boundary by AU size and this field should not be used.

•WP_GRP_SIZE

This field is fixed to 00h. The High Capacity SD Memory Card does not support write protected groups.

•WP_GRP_ENABLE

This field is fixed to 0. The High Capacity SD Memory Card does not support write protected groups.

•R2W_FACTOR

This field is fixed to 2h, which indicates 4 multiples. Write timeout can be calculated by multiplying the read access time and R2W_FACTOR. However, the host should not use this factor and should use 250 ms for write timeout

•WRITE_BL_LEN

This field is fixed to 9h, which indicates WRITE_BL_LEN=512 Byte.

•WRITE_BL_PARTIAL

This field is fixed to 0, which indicates partial block read is inhibited and only unit of block access is allowed.

•FILE_FORMAT_GRP

This field is set to 0. Host should not use this field.

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Contents Pin Definition PlacementFeatures 4GB High Capacity miniSD Card Description4GB High Capacity miniSD Card Mtbf 4GB High Capacity miniSD Card Information4GB High Capacity miniSD Card Architecture Bus Signal Line Load Power Supply VoltageCurrent Consumption Single card capacitance Parameter Symbol Min Max Unit Remark 4GB High Capacity miniSD Card Bus Signal Levels4GB High Capacity miniSD Card Bus Timing Output Delay time during Data Transfer Mode 4GB High Capacity miniSD Card Bus Timing High Speed Mode Output Hold time 4GB High Capacity miniSD Card Reliability and Durability OCR register 4GB High Capacity miniSD Card Register InformationPRV MIDOID PNMMDT PSNCRC CSD Register Fields CSD Version CsdstructureNsac TaacTranspeed Writeblkmisalign CCCReadbllen ReadblpartialSectorsize WpgrpenableCsize EraseblkenFileformat CopyPermwriteprotect TmpwriteprotectRCA Register Sdspec ScrstructureDatastataftererase Sdbuswidths SdsecurityMechanical Description Top View MiniSDHC Card series MiniSDHC Card series 4GB High Capacity miniSD Card MiniSD Card package dimensions
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