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Black cat takes you to learn UFS protocol Chapter 4: detailed explanation of UFS protocol stack
2022-07-06 06:20:00 【Black cat senior】
This paper is based on UFS3.1 JEDEC Agreement and personal work experience , If there is any mistake, please leave a message .
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The column where the article is located :《 Black cat takes you to learn :UFS protocol 》
1 UFS Protocol stack framework
UFS Define a complete protocol stack . From top to bottom , The application layer 、 Transport layer 、 Data link layer and physical layer .UFS Use MIPI(Mobile Industry Processor Interface , Mobile industry processor interface ) The league UniPro As the data link layer and MIPI Of M-PHY As the physical layer , Together, the two are called interconnection layers (UFS InterConnect Layer).
As shown in the figure , by UFS Protocol stack block diagram :
Be careful : This version of the standard assumes that only one device is connected to one UFS port . More topologies will be defined in future versions of the specification .
Application Layer and UTP: comply with SCSI standard
M-PHY and UniPro: comply with MIPI standard
2 application layer (UAP)
The application layer contains :ufs Command set (U
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