SD NAND Flash is a special form of NAND Flash, which contains an SD controller and NAND Flash, and is characterized by its small package and ease of use. The capacity of SD NAND Flash is 1Gb, 2Gb, 4Gb, and so on. The package form is LGA-8.
For users, it can be seen as a simple SD (TF) card to store some data, pictures or audio. It can also be used as a more powerful NAND Flash, eliminating the need to do ECC checksum and bad block management on your program.
Many products although now use SD (TF) cards, but the product designers do not want users to be able to replace these cards, or even use means such as dot glue to fix the card to prevent the card from falling off. This is because the card holder and the card are fixed by a snap. Once the product is dropped, the ensuing SD (TF) card is easily dropped and the SD (TF) card needs to be retrieved and inserted into the card holder. This affects customer experience and may be lost. SD NAND Flash can be considered as T-card welded on the PCB board, which will not drop and lose the card, reducing the return rate of the product.
In addition, some master chips do not support parallel interface NAND Flash, but need to use 1Gb, 2Gb, 4Gb capacity for voice and data information storage, or the reference driver code of the master chip only provides the basic driver of NAND Flash, and does not provide the verification and bad block management part of ECC.
In this case, SD NAND Flash is very suitable, all the tedious drivers for ECC checksum and bad block management are handled inside SD NAND Flash. The driver of the main control chip will be relatively simple and very easy to use. When customers encounter the above problems, they can use SD NAND Flash to make the product more stable and easier to use.
Dear cardholders, if you still have doubts or do not understand after reading the article, please contact us, it is a very tiring thing to understand or guess the answer by yourself, please leave the most troublesome things to us, there are specialties in the field, and there is a sequence of hearing, Shenzhen Leylong development focus on storage industry for 13 years, specializing in providing small capacity storage solutions.
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