Appendix A: Using The Client-Side Fifo; Figure A-1: Typical 10 Mbps/100 Mbps/ 1 Gbps Ethernet Fifo Implementation - Xilinx LogiCORE IP MAC v8.5 User Manual

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Using the Client-Side FIFO
The example design provided with the GEMAC core contains a FIFO used on the client-
side of the core. The source code for the FIFO is provided, and may be used and adjusted
for user applications.
The 10 Mbps/100 Mbps/1 Gbps Ethernet FIFO is designed for use with the GEMAC and
Tri-Mode Ethernet MAC (TEMAC) cores. The FIFO directly interfaces to the MAC client
interface providing a buffer between the MAC and the user's logic. The FIFO implements
a LocalLink user interface, (see
a direct connection to other LocalLink modules or the user's logic.
The 10 Mbps/100 Mbps/1 Gbps Ethernet FIFO consists of independent transmit and
receive FIFOs embedded in a top-level wrapper.
a typical implementation.
1-Gigabit Ethernet MAC v8.5 User Guide
UG144 April 24, 2009
-- DISCONTINUED PRODUCT --
LocalLink Interface
Xilinx FPGA
10 Mbps,
100 Mbps,
1 Gbps
Ethernet FIFO
Tx
Switch or
FIFO
Router
Rx
FIFO

Figure A-1: Typical 10 Mbps/100 Mbps/ 1 Gbps Ethernet FIFO Implementation

www.xilinx.com
"Overview of LocalLink Interface," on page
Figure A-1
Client Interface
1-Gigabit Ethernet MAC
Core
IOBs
Client
GMII
I/F
Appendix A
130) allowing
shows how the FIFO fits into
GMII/RGMII
1000BASE-T
Twisted
PHY
Copper
Pair
127