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News / Press
04/02/2021
embedded world DIGITAL: Highlights and innovations from Swissbit
Industry-optimized memory products for a wide range of applications & hardware-based security solutions for the IoT
At embedded world 2021 DIGITAL, Swissbit will focus on its expanding memory solutions portfolio of highly reliable, industrial-grade product ranges.
Technotes
27/07/2020
NAND Flash endurance testing
Typical application scenarios for NAND flash memory assume a service life of 3–5 years and in some cases even significantly longer.
The flash type to be used (SLC, pSLC, MLC, TLC, QLC) is selected accordingly, which has the necessary endurance, i. e. the lifespan measured in erase and programming cycles.
If the specified endurance is to be checked as part of the qualification of a NAND flash memory for a project, the rate of aging has a significant influence on the result.
23/12/2019
Bad Blocks
The presence of factory bad blocks in NAND flash is as much a technology reason as the occurrence of additional bad blocks during the lifetime.
Both are no (negative) quality indications. However, with the occurrence of bad blocks during the lifetime, the correct handling of these events by the firmware is critical in
order not to lose the new data as well as the already stored data of such blocks.
16/12/2019
Performance tests
To compare speed specifications in data sheets of NAND flash memory media, the test conditions must be identical. If the measurement was not started repeatedly or did not cover the entire logical address space, the specified speed can be significantly higher than the real achievable speed.
18/09/2019
Garbage Collection
Unlike hard drives or NOR flash, NAND flash does not have a fixed mapping of logical
memory addresses to physical memory addresses.
The assignment takes place via mapping tables, which are managed by the firmware of the storage medium.