Flash based memory is normally preferred when storing large volumes of data in embedded systems. Due to the simple interface and the small dimensions SD/MMC memory cards are often the first choice. Depending on the processor either the original SD/MMC interface is used, or for smaller processors - the SPI interface.
High quality industrial SD/MMC cards with single level (SLC) NAND flash offering high reliability are now available for industrial applications.
Problems arise either when there is not enough space for an SD/MMC card holder, or if there is a poor electrical contact due to the environmental conditions (vibration, dampness etc.). This is especially true if the board needs to be coated or moulded together with the memory.
In principle, NAND Flash components can be connected directly to the processor. However, a special, component-specific FTL software (Flash Transfer Layer) has to be used to ensure reliable operation. The use of such software routines on smaller processors is limited due to the complexity of the FTL.
The new Solderable Memory Module (SMM), from Art of Technology offers an elegant solution for applications in industrial and medical environments - a compact memory module with an electrical SD/MMC interface which is soldered directly onto a printed circuit board.
With a size of 24 x 20 mm2 and a pitch of 1.27mm it is significantly smaller than an SD/MMC card, has less demands on board design and can be used where space considerations are critical.
In order to ensure high data reliability and long term use, the SMM is built exclusively with industrial-grade SLC NAND memory from Micron. The NAND Flash controller used is also used in industrial SD/MMC cards providing a high level of compatibility with standard SD/MMC cards. A controlled bill of material (BOM) ensures that hardware and firmware changes to the NAND Flash controller are always visible to the customer.
In close co-operation with the manufacturer of the NAND Flash controller customized functions can be realised (e.g. password protection, emergency deletion etc.) .
The SMM is the ideal choice for your demanding embedded systems.