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.
15
write speed factor (R2W_FACTOR) 3 010b R [28:26]
max. write data block length (WRITE_BL_LEN) 4 9 R [25:22]
partial blocks for write allowed (WRITE_BL_PARTIAL) 1 0 R [21:21]
reserved - 5 00000b R [20:16]
File format group (FILE_FORMAT_GRP) 1 0 R [15:15]
copy flag COPY 1 x R/W(1) [14:14]
permanent write protection PERM_WRITE_PROTECT 1 x R/W(1) [13:13]
temporary write protection TMP_WRITE_PROTECT 1 x R/W [12:12]
File format (FILE_FORMAT) 2 00b R [11:10]
reserved - 2 00b R [9:8]
CRC CRC 7 xxxxxxxb R/W [7:1]
not used, always'1' - 1 1 - [0:0]
The CSD Register Fields (CSD Version 2.0)
The following sections describe the CSD fields and the relevant data types. If not explicitly defined otherwise, all bit
strings are interpreted as binary coded numbers starting with the left bit first.
• CSD_STRUCTURE
Field structures of the CSD register are different depend on the Physical Specification Version and Card Capacity.
The CSD_STRUCTURE field in the CSD register indicates its structure version.
The following table shows the version number of the related CSD structure.
CSD_STRUCTURE CSD structure version Card Capacity
0
CSD
V
ersion
1.0
S
t
andard C
a
p
acity
1
CSD
V
ersion
2.0
High Ca
p
acity and Exten
d
ed Ca
p
acity
2
-
3
reserv
e
d
CSD Register Structure