TS4GSDHC10 Datasheet, PDF (14/26 Pages) Transcend Information. Inc. – 4~16GB High Capacity Secure Digital Card

SDHC10 Card series
4~16GB High Capacity Secure Digital Card
3. CSD Register
The CSD Regsiter shows Definition of the CSD for the High Capacity SD Memory Card and Extended Capacity SD
Memory Card (CSD Version 2.0). The following sections describe the CSD fields and the relevant data types for the
High Capacity SD Memory Card.
CSD Version 2.0 is applied to SDHC and SDXC Cards. The field name in parenthesis is set to fixed value and indicates
that the host is not necessary to refer these fields. The fixed values enables host,which refers to these fields, to keep
compatibility to CSD Version 1.0. The Cell Type field is coded as follows: R = readable, W(1) = writable once, W =
multiple writable.
Name
Field
CSD structure
CSD_STRUCTURE
reserved
-
data read access-time
(TAAC)
data read access-time in CLK (NSAC)
Width Value
2
01b
6
00 0000b
8
0Eh
8
00h
Cell Type CSD-slice
R
[127:126]
R
[125:120]
R
[119:112]
R
[111:104]
max. data transfer rate
(TRAN_SPEED)
8
card command classes
CCC
12
max. read data block length (READ_BL_LEN)
4
partial blocks for read allowed (READ_BL_PARTIAL)
1
write block misalignment
(WRITE_BLK_MISALIGN) 1
read block misalignment
(READ_BLK_MISALIGN) 1
DSR implemented
DSR_IMP
1
32h, 5Ah, 0Bh or 2Bh R
01x110110101b R
9
R
0
R
0
R
0
R
x
R
[103:96]
[95:84]
[83:80]
[79:79]
[78:78]
[77:77]
[76:76]
reserved
device size
-
C_SIZE
6
00 0000b
22 xxxxxxh
R
[75:70]
R
[69:48]
reserved
-
1
0
R
[47:47]
erase single block enable
erase sector size
write protect group size
(ERASE_BLK_EN)
(SECTOR_SIZE)
(WP_GRP_SIZE)
1
1
7
7Fh
7
0000000b
R
[46:46]
R
[45:39]
R
[38:32]
write protect group enable (WP_GRP_ENABLE)
1
0
R
[31:31]
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