NVMe-IP DDR reference design manual

PublishTime：2021-08-10

●This reference design is modified from standard NVMe-IP demo by using DDR to be data buffer in stead of FIFO, as show n in yellow block of Figure 1-1 . DDR must be used for the system which requires big data buffer such as data logger from high-speed A/D which receives data at constant rate.
●In Write command, when SSD is not ready, data from TestGe n is stored to DDR. The data from DDR is flushed to SSD when SSD changes to ready status. Therefore, minimum DDR buffer size in the system is equal to (the maximum busy time of SSD x data in put rate). This feature is necessary in data logger system.
●In Read comma nd, data from SSD is stored in DDR before forwarding to TestGen. Data in DDR must be always filled for user reading in constant rate when SSD is not ready to return data. Similar to Write command, minimum DDR buffer size is equal to (the maximum busy time of SSD x data output rate). This feature is applied in high resolution display system.
●Before running the reference design, it is recommended to study NVMe-IP datasheet and standard demo firstly from following link.

Brand of Product：	Design Gateway
Part#：	NVMe-IP More Part#
Product Category：	More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	31-Mar-21
Version Number：	Rev1.1
Data Encoding：
Data Size：	1.2 MB

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