User Guide

VSC8584 Evaluation Board
VPPD-03500 VSC8584 User Guide Revision 1.0 9
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Figure 7 • Run PHY Script GUI Window (after script is loaded)
Figure 8 • Run PHY Script GUI Window (after script is loaded)
4.4.3 Copper Media Operation (1000BASE-T)
A single register write and some external coax cables enables 1G Ethernet traffic to be received by the
VSC8584 RJ-45 port, routed through the VSC8584 and externally via coax loopback cables through the
SGMII interface and transmitted back to the traffic source on the same copper port. First configure the
SerDes in SGMII mode by writing to Micro page 18’d. This is a global setting and does not need to be
applied per port.
Steps for external SGMII loopback:
Set up the copper traffic source (i.e., IXIA or Smartbits)
Connect an Ethernet cable to an RJ-45 Port 0.
Connect two matched coax cables, J1 - J4 and J2 - J5.
Write using the "Micro Page Registers" window: 18'd 0 × 80F0
When "Micro Page" 18'd is read back, bit 15 will clear.
Linkup bit is in MII Reg 1, bit 2 (MII 1.2), read twice to update.
Traffic should be the following:
Steps for SGMI forwarding port 0 ↔ port 1: