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UG029, September 6, 2013
Fabric FIFO Interface....................................................................................... 29
Overview .............................................................................................................................. 29
Transmit FIFO Interface Block Diagram ....................................................................................... 30
Receive FIFO Interface Block Diagram ........................................................................................ 31
Credit Handling .................................................................................................................... 32
Receive Direction: FIFO to Application ......................................................................................... 32
Transmit Direction: Application to FIFO ........................................................................................ 33
Data Structure ...................................................................................................................... 33
FIFO Interface Transmit Operation ...................................................................................... 37
FIFO Interface Receive Operation ....................................................................................... 39
Frame Status ....................................................................................................................... 42
FIFO Thresholds .................................................................................................................. 43
FIFO Sections Behavior (Watermarks) ......................................................................................... 43
Flow Control Interface ..................................................................................... 45
Link Pause Flow Control Frames ......................................................................................... 45
Priority Flow Control (PFC) Frames ..................................................................................... 46
Transmit Pause/PFC Operation ........................................................................................... 47
Receive Pause/PFC Operation ............................................................................................ 47
PFC Mode .................................................................................................................................... 47
Link Pause Mode ......................................................................................................................... 47
Serial Bus Interface ......................................................................................... 49
Overview .............................................................................................................................. 49
Port List ................................................................................................................................ 49
Read Operation .................................................................................................................... 49
Write Operation .................................................................................................................... 50
PMA Management Interface ............................................................................ 51
Features .................................................................................. Error! Bookmark not defined.
Power State Descriptions ..................................................................................................... 51
Power State Sequencing ..................................................................................................... 53
Auto-Negotiation ............................................................................................. 54
Overview .............................................................................................................................. 54
Usage .................................................................................................................................. 55
IEEE 1588 Timestamping ................................................................................ 58
Receive Timestamping ........................................................................................................ 58
