
1-7 SanDisk miniSD Card Product Manual, Rev. 1.1 © 2003 SANDISK CORPORATION
mini 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 1-5. Memory Array Structures Summary
Part Number Block Size
(Byte)
Data Area + Protected size
(Blocks)
Protected Area size
(Blocks)
User Area
(Blocks)
SDSDM-256 512 499,456 5,376 494,080
SDSDM-128 512 248,640 2,624 246,016
SDSDM-64 512 123,232 1,376 121,856
SDSDM-32 512 60,512 736 59,776
SDSDM-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 affect this area.
1.5.9.6. Read and Write Operations
The miniSD Card supports two read/write modes as shown in Figure 1-3.
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