Product manual

Introduction to the SD Card
1-8 SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
SD Memory Card
WP Group 1
WP Group 0
Block
n
Sector 1
Block
2
Block
1
Block
0
Sector 2
Sector 3
Sector n
WP Group n
Protected Area (Copyright protection)
Block
n
Sector 1
Block
2
Block
1
Block
0
Sector n
Figure 1-2. Memory Array Partitioning
Table 1-3. Memory Array Structures Summary
Part Number Block Size
(Byte)
Data Area + Protected size
(Blocks)
Protected Area size
(Blocks)
User Area
(Blocks)
SDSDJ-1024 512 2,004,224 20,480 1,983,744
SDSDJ-512 512 1,001,104 10,240 940,864
SDSDJ-256 512 499,456 5,376 494,080
SDSDJ-128 512 248,640 2,624 246,016
SDSDJ-64 512 123,232 1,376 121,856
SDSDB-32 512 60,512 736 59,776
SDSDB-16 512 29,152 352 28,800
NOTE: All measurements are in units per card.
Protected Area—The part of the Card that relates to the secured copyright management and has separate DOS
partitioning including sectors and blocks. The card write protection mechanism does not effect this area.