High-Speed PCIe and SSD Development and Challenges
PCIe stands for Peripheral Component Interconnect Express (PCIe), which is a very important specification in computer buses. It is widely used in a large number of applications for data exchange communication within computer components, such as network cards, graphics cards, and nowadays NVMe solid state drives, which are mostly connected to the motherboard via PCIe. Since its introduction in 2003, PCIe has evolved into a fifth or even sixth-generation specification.
Physical Layer Peripheral Component Interconnect Express Transaction Layer Data Link Layer Physical Coding Sublayer Physical Medium Attachment
Source: design-reuse.com