AX99100QI datasheet(20/70 Pages) ASIX

20 / 70 page

AX99100

PCIe to Multi I/O Controller

The Data Link Layer

The Data Link Layer acts as an intermediate stage between the Transaction Layer and the Physical Layer. The Data

Link Layer is responsible for reliably conveying Transaction Layer Packets (TLPs) supplied by the Transaction

Layer across a PCI Express Link to the other component’s Transaction Layer

The Data Link Layer is responsible for the following



Link management including TLP acknowledgment



Retry mechanism in case of a non-acknowledged packet



Flow control across the Link (transmission and reception)



Power management



CRC generation and CRC checking



Error reporting

Transaction Layer/User Interface Layer

Transaction layer and User interface layer together perform all transaction layer functionalities. User interface layer

defines a plug-and-play type interface mechanism to accept TLPs from user space for transmission, and to pass

received TLPs on reception.

The Transaction Layer is primarily responsible for the following



Assembly and disassembly of Transaction Layer packets (TLPs)



Storage of configuration information



Converts received Completion packets into data payloads,



Updates status information



Responsible for flow control services



Ordering rules



Power management services



PCIe Bridge



Master Slave Bridge is divided into PCIe packet formatter, PCIe target interface block, Mater arbiter, Slave

de-mux and VCI interface block.

All detail description for PCIe operation, please reference to the standard of “PCI Express Base Specification”.

AX99100QI датащи(PDF) 20 Page - ASIX Electronics Corporation

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