128MB to 2GB
Industrial Grade SD Cards
www.stec-inc.com
SLSDxxxBS(I)U
Compliant to Specifications
SD Memory Card Specification Part 1,
Physical Layer Specification V1.1
SD Memory Card Specification Part 2,
File System Specification V1.01
SD Memory Card Specification Part 3
Security Specification V1.01 (CPRM)
Supports SD and SPI Modes
Variable Clock Rate:
Low speed mode: 0 to 25MHz
High speed mode: 26 to 50MHz
Voltage Range
Basic communication : 2.0V to 3.6V
(CMD0, CMD15, CMD55, ACMD41)
Normal operating status: 2.7 to 3.6V
Low Power Consumption
Extended Data Write/Erase Endurance
Optimized wear leveling algorithm
Hardware ECC to automatically detect
and correct errors
2,000,000 Program/Erase cycles per
block for 128MB, 256MB and 512MB
300,000 Program/Erase cycles per
block for 1GB and 2GB
Data Retention: 10 years
Power-on damage free card insertion
and removal
Two Operating Temperature Ranges
available:
Commercial: 0 to 70°C
Industrial: -40 to 85°C
RoHS compliant lead-free
61000-04349-101, September 2006
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Legend:
(I) =
Industrial temperature range (-40ºC to +85 ºC).
Part numbers without (I) =
Commercial temperature range (0ºC to 70ºC).
General Description
The Secure Digital Industrial Grades provide a high reliable storage media
in a very small space. The simplicity of the SD and SPI protocols allows
easy host design and integration.
The SD Memory Card support high security level of copyright protection
and an easy to implement interface.
STEC’s Industrial Grade SD cards are specifically designed, manufactured
and tested to withstand extreme environmental conditions and to improve
system reliability and endurance.
At the heart of each card there is an advanced microcontroller that
performs elaborate Flash management including 5 Bytes on-the-fly Error
Detection and 4-Bytes Error Correction (EDC/ECC), bad block
management (BBM) and extensive wear leveling. STEC selects the highest
reliability Single Level Cell (SLC) Flash for its superior endurance.
This combination allows achieving 2,000,000 logical program/erase cycles
for 128MB, 256MB, and 512MB capacities, and 300,000 logical
program/erase cycles for 1GB and 2GB capacities.
STEC manufacturing process and test methodology makes the card more
robust and capable to perform at the extreme temperature conditions.
To assure that each card shipped meets the rigorous threshold set by the
OEM customers, each card is extensively tested at STEC's manufacturing
facility to guarantee perfect functionality in extreme conditions. STEC
provides rigorous bill of material control as an additional guarantee for the
customer, ensuring long term product stability and support.
Ordering Information: SD Card
Part Number
SLSD128BS(I)U
SLSD256BS(I)U
SLSD512BS(I)U
SLSD1GBBS(I)U
SLSD2GBBS(I)U
Capacity
128 Mbytes
256 Mbytes
512 Mbytes
1 GBytes
2 GBytes
SLSDxxxBS(I)U
Table of Contents
Industrial Grade SD Card Datasheet
1.0 Product Specifications........................................................................................................3
1.1 Package Dimensions ................................................................................................................... 3
1.2 Pin Assignment and Signal Description ....................................................................................... 5
1.3 Performance................................................................................................................................. 6
2.0 Environmental Specifications ............................................................................................6
2.1
2.2
2.3
2.4
2.5
Recommended Operating Conditions.......................................................................................... 6
Reliability ...................................................................................................................................... 7
Durability....................................................................................................................................... 7
Humidity, & ESD........................................................................................................................... 8
Absolute Maximum Ratings ......................................................................................................... 8
3.0 Electrical Specifications .....................................................................................................9
3.1 DC Characteristics ....................................................................................................................... 9
3.2 Signal Loading............................................................................................................................ 10
3.3 AC Characteristics...................................................................................................................... 11
4.0 Host Access Specifications..............................................................................................13
4.1 Functional Block Diagram .......................................................................................................... 13
4.2 SD and SPI Bus Modes.............................................................................................................. 14
4.2.1 SD Bus Mode Protocol............................................................................................................ 14
4.2.2 SPI Bus Mode Protocol........................................................................................................... 16
4.2.3 Mode Selection ....................................................................................................................... 17
4.3 Card Registers ........................................................................................................................... 17
5.0 Revision History ................................................................................................................21
61000-05203-107, March 2008
2
SLSDxxxBS(I)U
1.0
1.1
Industrial Grade SD Card Datasheet
Product Specifications
Package Dimensions
Refer to the Table 1, Figure 1, and Figure 2 for package dimensions of the card. Units are in millimeters,
and tolerances are ±0.15mm unless otherwise specified.
Table 1: Mechanical Dimensions SD Card
Parameter
Length
Width
Height
Value
32.00 ± 0.10 mm
24.00 ± 0.10 mm
2.10 ± 0.15 mm
Figure 1: Mechanical Dimensions SD Card
61000-05203-107, March 2008
3
SLSDxxxBS(I)U
Industrial Grade SD Card Datasheet
Figure 2: Mechanical Dimensions SD Card (continued)
61000-05203-107, March 2008
4
SLSDxxxBS(I)U
1.2
Pin Assignment and Signal Description
Industrial Grade SD Card Datasheet
Table 2: SD Mode Pin Assignment and Signal Description
Pin
1
2
3
4
5
6
7
8
9
Signal Name
CD, DAT3
CMD
VSS1
VDD
CLK
VSS2
DAT0
DAT1
DAT2
Pin Type
I/O, Push-Pull Drivers
Push-Pull Drivers
Supply
Supply
Input
Supply
I/O, Push-Pull Drivers
I/O, Push-Pull Drivers
I/O, Push-Pull Drivers
Description
Card Detect, Data line bit 3. See Notes 1 and 2.
Command/Response
Supply voltage ground
Supply voltage
Clock
Supply voltage ground
Data line bit 0.
For read only cards, DAT0 is output only.
Data line bit 1.
For read only cards, DAT1 is output only.
Data line bit 2.
For read only cards, DAT2 is output only.
Table 3: SPI Mode Pin Assignment and Signal Description
Pin
1
2
3
4
5
6
7
8
9
Signal Name
/CS
DI
VSS1
VDD
SCLK
VSS2
DO
—
—
Pin Type
Input
Input
Supply
Supply
Input
Supply
Output; Push Pull Drivers
—
—
Data in
Supply voltage ground
Supply voltage
Clock
Supply voltage ground
Data out
Reserved for future use.
Host should pull up with 10 to 100K ohm resistance.
Reserved for future use.
Host should pull up with 10 to 100K ohm resistance.
Description
Chip select (“/” indicates low active)
Notes:
1. The extended DAT lines (DAT1-DAT3) are input on power up. They start to operate as DAT lines
after SET_BUS_WIDTH command. The Host shall keep its own DAT1-DAT3 lines in input mode, as
well, while they are not used. It is defined so, in order to keep compatibility to MultiMediaCards.
2. After power up the CD line is input with 50KOhm pull-up (can be used for card detection or SPI mode
selection). The pull-up should be disconnected by the user, during regular data transfer, with
SET_CLR_CARD_DETECT (ACMD42) command.
Figure 3: SD Card Contact Area
61000-05203-107, March 2008
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