Datasheet

S
S
S
D
D
D
H
H
H
C
C
C
1
1
1
0
0
0
C
C
C
a
a
a
r
r
r
d
d
d
s
s
s
e
e
e
r
r
r
i
i
i
e
e
e
s
s
s
Rev. 1.0
4~32GB High Capacity Secure Digital Card
Transcend Information Inc.
18
DSR_IMP DSR type
0 no DSR implemented
1 DSR implemented
DSR Implementation Code Table
•
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
The Minimum user area size of SDHC Card is 4,211,712 sectors (2GB + 8.5MB).
The Minimum value of C_SIZE for SDHC in CSD Version 2.0 is 001010h (4112).
The maximum user area size of SDHC Card is (32GB - 80MB)
The maximum value of C_SIZE for SDHC in CSD Version 2.0 is 00FF5Fh (65375).
•
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 is not related to erase operation. SDHC and SDXC
Cards indicate memory boundary by AU size and this field should not be used.
• WP_GRP_SIZE
This field is fixed to 00h. SDHC and SDXC Cards do not support write protected groups.
•
WP_GRP_ENABLE
This field is fixed to 0. SDHC and SDXC Cards do 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