Card Status Register - SanDisk 2GB - 2GB Micro Secure Digital Card Product Manual

SanDisk microSD™, microSDHC™ and microSDXC™ cards
Refer to Section 5.3.3, Table 5-16 of the SDA Physical Layer Specification, Version
3.01 for more detailed information.
Field
CSD_STRUCTURE
-
TAAC
NSAC
TRANS_SPEED
CCC
READ_BL_LEN
READ_BL_PARTIAL
WRITE_BLK_MISALIGN
READ_BLK_MISALIGN
DSR_IMP
-
C_SIZE
-
ERASE_BLK_EN
SECTOR_SIZE
WP_GRP_SIZE
WP_GRP_ENABLE
Reserved
R2W_FACTOR
WRITE_BL_LEN
WRITE_BL_PARTIAL
-
FILE_FORMAT_GRP
COPY
PERM_WRITE_PROTECT
TMP_WRITE_PROTECT
FILE_FORMAT
Reserved
CRC
-
3.5.4

Card Status Register

The Card Status Register (CSR) transmits the card's status information (which may be
stored in a local status register) to the host. The CSR is defined in Section 4.10.1 in
the SDA Physical Layer Specification, Version 3.01.
January 2012 Version 2.5 © 2008 - 2012 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure agreements 15
Table 9: CSD Register (CSD Version 2.0)
Typical CSD Value
2.0
-
1.5 msec
0
Standard Mode 25 MHz
High Performance Mode 50MHz
Ultra High Speed Mode 104MHz
All (inc. WP, lock/unlock)
9
Yes
No
No
No
0
See SDA Physical Layer
Specification
0
1
64 blocks
000000b
No
-
X4
No
-
0
Has been copied
Not protected
Not protected
HD w/partition
-
CRC7
-
OEM Product Manual
Description
CSD Structure
Reserved
Data read access-time
Data read access-time-2 in CLK cycles
(NSAC*100)
Maximum data transfer rate
Card command classes
Maximum read data block length
Partial blocks for read allowed
Write block misalignment
Read block misalignment
DSR implemented
Reserved
Device size
Reserved
Erase single block enable
Erase sector size
Write protect group size
Write protect group enable
Reserved for MMC compatibility
Write speed factor
Maximum write data block length
Partial blocks for write allowed
Reserved
File format group
Copy flag (OTP)
Permanent write protection
Temporary write protection
File format
Reserved
CRC
Not used, always "1"
2.5