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High Capacity microSD Card

Transcend Information Inc.

17

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.

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

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.

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

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

This field is fixed to 2h, which indicates 4 multiples. Write timeout can be calculated by multiplying the read access time

nd R2W_FACTOR. However, the host should not use this factor and should use 250 ms for write timeout

a

WRITE_BL_LEN

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

WRITE_BL_PARTIAL

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

T

FILE_FORMAT_GRP

•