SanDisk SDSDB-016G-A11 User Manual

Chapter 3 – SD Card Interface Description
Revision 2.2 SD Card Product Manual
© 2004 SanDisk Corporation 3-23 12/08/04
3.5.7 SD Card Registers in SPI Mode
In SPI mode, all the card’s registers are accessible. Their format is identical to the format in
the SD Card mode. However, a few fields are irrelevant in SPI mode. In SPI mode, the card
status register has a different, shorter, format as well. Refer to the SPI Protocol section for
more details.
3.6 Data Interchange Format and Card Sizes
In general, SD Card data is structured by means of a file system. The SD Card File System
Specification, published by the SD Association, describes the file format system that is
implemented in the SanDisk SD Card. In general, each SD Card is divided into two
separate DOS-formatted partitions as follows:
• User Area—used for secured and non-secured data storage and can be accessed by the
user with regular read/write commands.
• Security Protected Area—used by copyright protection applications to save security
related data and can be accessed by the host using the secured read/write command
after doing authentication as defined in the SD Security Specification. The security
protected area size is defined by SanDisk as approximately one percent of the total size
of the card. Tables 3-31 and 3-32 describe the user and protected areas for all SanDisk
SD Cards.
Table 3-31 User Area DOS Image Parameters
Capacity Total
LBAs
Number of
Partition
System Area
Sectors
Total Partition
Sectors
User Data
Sectors
User Data
Bytes
16 MB 28,800 39 28,743 28,704 14,696,448
32 MB 59,776 45 59,725 59,680 30,556,160
64 MB 121,856 57 121,817 121,760 62,341,120
128 MB 246,016 95 245,919 245,824 125,861,888
256 MB 494,080 155 493,979 493,824 252,837,888
512 MB 990,976 275 990,627 990,352 507,060,224
1 GB 1,984,000 519 1,983,495 1,982,976 1,015,283,712
2 GB 3,917,072 519 3,967,239 3,966,720 2,030,960,640
Table 3-32 Protected Area DOS Image Parameters
Capacity Total
LBAs
Number of
Partition
System Area
Sectors
Total Partition
Sectors
User Data
Sectors
User Data
Bytes
16 MB 352 35 351 316 161,792
32 MB 736 37 733 696 356,352
64 MB 1,376 37 1,373 1,336 684,032
128 MB 2,624 35 2,611 2,576 1,318,912
256 MB 5,376 37 5,365 5,328 2,727,936

SanDisk SDSDB-016G-A11 Specifications

General

Brand	SanDisk
Model	SDSDB-016G-A11
Category	Storage
Language	English