Chapter 5: Using The Client Side Data Path; Receiving Inbound Frames; Normal Frame Reception - Xilinx LogiCORE IP MAC v8.5 User Manual

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Using the Client Side Data Path
This chapter provides general guidelines for creating designs using the GEMAC core,
including a detailed description of each client-side data flow interface of the core.
Definitions of the abbreviations used throughout the remainder of this chapter are defined
in
Table 5-1: Abbreviations Used in Timing Diagrams

Receiving Inbound Frames

Received Ethernet frames are presented to the client logic on the Receiver subset of the
Client-Side Interface. For port definition, see

Normal Frame Reception

Figure 5-1
prepared to accept data at any time; there is no buffering within the MAC to allow for
latency in the receive client. Once frame reception begins, data is transferred on
consecutive clock cycles to the receive client until the frame is complete. The MAC asserts
the rx_good_frame signal to indicate that the frame was successfully received and that
the frame should be analyzed by the client.
1-Gigabit Ethernet MAC v8.5 User Guide
UG144 April 24, 2009
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Table 5-1.
Abbreviation
DA
SA
L/T
FCS
illustrates the timing of a normal inbound frame transfer. The client must be
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Definition
Destination address; 6 bytes
Source address; 6 bytes
Length/type field; 2 bytes
Frame check sequence; 4 bytes
"Receiver Interface," on page
Chapter 5
27.
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