Manual
803M Series Industrial Grade microSD Card Product Manual v2.0Cactus Technologies
®
2
Supported Standards
1.1.
Cactus Technologies microSD are fully electrically compatible with the following specication:
• SD Card Association Physical Layer Specication, Versions 1.01, 1.1 and 2.0
Product Features
1.2.
Cactus Technologies Industrial microSD contain a high level, intelligent controller. This intelligent
controller provides many capabilities including the following:
• SD Card register and command set handling.
• Management of erasing and programming the ash memory independent of the host system.
• Sophisticated defect managing capabilities (similar to magnetic disk drives).
• Sophisticated system for error recovery using powerful error correction code (ECC).
• Intelligent power management for low power operation.
1.2.1. Host and Technology Independence
Cactus Technologies Industrial microSD utilize a 512-byte sector which is the same as that in an IDE
magnetic disk drive. To write or read a sector (or multiple sectors), the host computer software simply
issues a Read or Write command to the drive and then waits for the command to complete. The host
system does not need to know the details of how the ash memory is erased, programmed or read, as
this is all managed by the built-in controller in the drive. Also, with the intelligent on-board controller,
the host system software will not need to be updated to match new ash technologies. Thus, systems
that support the Cactus Technologies Industrial microSD products today will continue to work with
future Cactus Technologies Industrial microSD products built with new ash technology without having
to update or change host software.
1.2.2. Defect and Error Management
Cactus Technologies Industrial microSD products contain a sophisticated defect and error
management system similar to those found in magnetic disk drives. The defect management is
completely transparent to the host and does not consume any user data space.
The bit error rate for Cactus Technologies Industrial microSD products is much lower than that of
magnetic disk drives. When a read error does occur, the drive has sophisticated ECC to recover the
data.
These defect and error management systems, coupled with the solid-state construction, give Cactus
Technologies Industrial microSD products extremely high reliability.