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pSLC

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pSLC stands for pseudo-SLC. This form of NAND flash technology uses MLC-style cells to mimic the behavior of SLC NAND flash memory. pSLC is frequently marketed as an alternative to industrial grade SLC storage, but it may not be appropriate for every industrial situation. As with all kinds of embedded memory solutions, it can helpful to work with your manufacturer to determine which technology is best suited to your device. Here are the facts you need to know about pSLC.

 

pSLC 101

SLC NAND flash technology allows one bit of data to be stored per cell in the memory device. As such, the cells are extremely small—after all, they don’t need much space for capacity. MLC NAND flash storage chips have bigger cells, since those cells are designed to store two bits of data.

 

pSLC NAND flash uses MLC-sized cells, but prevents access to the middle of each cell and only allows the top and bottom areas of the cells to be used. This restricts the storage capacity to one bit of data, allowing the memory application to achieve SLC-like processing speeds, but with an MLC design.

 

pSLC Pros and Cons

For some OEMs, there are clear advantages to both SLC and MLC NAND flash, and choosing the best fit for their host device can be challenging. pSLC is an intermediate solution that incorporates many of the benefits of both forms of storage in a way that works for many industrial and commercial users.

 

However, there are a few realities of pSLC that all users should know. In addition to incorporating the larger cell size of MLC flash technology, pSLC also has the finer trace widths of MLC flash. As such, pSLC has a greater risk of crosstalk issues, read disturb errors, and data corruption and loss problems. As a result, it can’t be used interchangeably with SLC flash, and industrial grade users should consult with their manufacturer or discuss testing before relying on pSLC technology.

 

Let Delkin help you find the most suitable storage solution for embedded memory in your industrial device. We can assist with personalized solutions for your needs today.

 

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