SanDisk microSD™, microSDHC™ and microSDXC™ cards
OEM Product Manual
2.5
January 2012 Version 2.5 © 2008 - 2012 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure agreements
14
Table 8: CSD Register (CSD Version 1.0)
Field
Typical CSD Value
Description
CSD_STRUCTURE 1.0
CSD
Structure
- -
Reserved
TAAC
1.5 msec
Data read access-time-1
NSAC
0
Data read access-time-2 in CLK cycles
(NSAC*100)
TRANS_SPEED
Standard Mode 25 MHz
High Performance Mode 50MHz
Ultra High Speed Mode-I
104MHz
Maximum data transfer rate
CCC
All (inc. WP, lock/unlock)
Card command classes
READ_BL_LEN 2G
=
0xA
Up to 1G – 0x9
Maximum read data block length
READ_BL_PARTIAL
Yes
Partial blocks for read allowed
WRITE_BLK_MISALIGN No
Write
block
misalignment
READ_BLK_MISALIGN
No
Read block misalignment
DSR_IMP No
DSR
implemented
- -
Reserved
C_SIZE
1
GB
2
GB
Secured
0xF22
0xF24
Device size
VDD_R_CURR_MIN
100 mA
Maximum read current @V
DD
min
VDD_R_CURR_MAX
80 mA
Maximum read current @V
DD
max
VDD_W_CURR_MIN
100 mA
Maximum write current @V
DD
min
VDD_W_CURR_MAX
80 mA
Maximum write current @V
DD
max
C_SIZE_MULT 2G=2048
1G-1024
Device size multiplier
ERASE_BLK_EN Yes
Erase
single block enable
SECTOR_SIZZE
31 blocks
Erase sector size
WP_GRP_SIZE
127 sectors
Write protect group size
WP_GRP_ENABLE
Yes
Write protect group enable
Reserved -
Reserved
for
MMC
compatibility
R2W_FACTOR
X16
Write speed factor
WRITE_BL_LEN
0x9
Maximum write data block length
WRITE_BL_PARTIAL No
Partial
blocks
for
write
allowed
- -
Reserved
FILE_FORMAT_GRP 0
File
format
group
COPY
Has been copied
Copy flag (OTP)
PERM_WRITE_PROTECT Not protected
Permanent write protection
TMP_WRITE_PROTECT Not
protected
Temporary
write
protection
FILE_FORMAT HD
w/partition
File
format
Reserved -
Reserved
CRC CRC7
CRC
-
-
Not used, always "1"