SanDisk INAND Product Manual page 18

Revision 3.1
3.4.3 Card Specific Data Register
The Card Specific Data (CSD) Register configuration information is required to access
iNAND data. The CSD defines the data format, error correction type, maximum data
access time, etc. The field structures of the CSD Register vary depending on the physical
specifications and card capacity. The CSD_STRUCTURE field in the CSD Register
indicates which structure version is used. Table 3-4 shows the version number as it relates
to the CSD structure. Refer to Section 5.3.1 of the SDA Physical Layer Specification,
Version 2.00 for more information.
Table 3-4
CSD_STRUCTURE
0
1
2-3
Table 3-5 provides an overview of the CSD Register. More field-specific information can
be found in Section 5.3.2, Table 5-4 of the SDA Physical Layer Specification, Version 2.00.
Table 3-5
CSD_ STRUCTURE
---
TAAC
NSAC
TRANS_ SPEED
CCC
READ_BL_ LEN
READ_BL_ PARTIAL
WRITE_BLK_ MISALIGN
READ_BLK_ MISALIGN
DSR_IMP
---
C_SIZE
VDD_R_ CURR_MIN
VDD_R_ CURR_MAX
© 2006 SanDisk Corporation
CSD Register Structures
CSD Structure Version
CSD Version 1.0
CSD Version 2.0
Reserved
CSD Register (CSD Version 1.0)
Field CSD Value
1.0
---
1.5 msec
0
Default 25MHz
High-speed 50MHz
All (inc. WP,
lock/unlock)
2G
Up to 1G
Yes
No
No
No
---
2 GB
1 GB
512 MB
256 MB
100 mA
80 mA
3-5
Chapter 3 – iNAND Interface Description
SanDisk iNAND Product Manual
Valid for SD Memory Card Physical
Specification Version / Card Capacity
Version 1.01 to 1.10
Version 2.00 / Standard Capacity
Version 2.00 / High Capacity
---
Description
CSD structure
Reserved
Data read access time-1
Data read access time-2 in CLK cycles
(NSAC*100)
Max. data transfer rate
Card command classes
Max. read data block length
Partial blocks for read allowed
Write block misalignment
Read block misalignment
DSR implemented
Reserved
Device size
Max. read current @VDD min.
Max. read current @VDD max.
12/07/06