VSC8574 Evaluation Board
VPPD-03067 VSC8574 User Guide Revision 2.0
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To make a connection to the EVB, click “Rabbit” and enter the IP address of the EVB, then click on
“Connect”. The display next to the IP address window should change to “Connected”. If it does not,
check the IP address, or your network configuration until connection with the EVB can be successfully
established.
Double-click on “MII Registers” and the window shown in Figure 4 should appear:
Figure 4 • MII Registers GUI Window
Verify the device is up and running by reading MII Register 0. It should read back 0x1040. Reading back
all 0’s or all 1’s indicates a problem. A checked box means the bit is set to “1”, if unchecked it is “0”.
4.4.1
Copper Media Operation (1000BASE-T)
A single register write and some external coax cables enables 1G Ethernet traffic to be received by the
VSC8574 RJ-45 port, routed through the VSC8574 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.
Set up the Copper traffic source (ie: IXIA or Smartbits)
Connect an Ethernet cable to an RJ-45 Port 0.
Connect two matched coax cables, J1 – J4 and J2 – J3.
Write using the “Micro Page Registers” window: 18’d 0x80F0.
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 flowing.
4.4.2
Fiber Media Operation (100BASE-FX)
Follow all steps in section 2.53 with fiber media connection to (IXIA) and add the following steps.
Write using the “Micro Page Registers” window: 18’d 0x8FD1. (Global)
When “Micro Page” 18’d is read back, bit 15 will clear.
Write “MII Register” (PHY 0) 23’d 0x0304 (Sets Media Mode)
Write “MII Register” (PHY0) 0’d 0x9040 (SW Reset for media mode setting to have effect)
Write “Extended MII Register” (PHY0) 19’d 0x0001 (Flip SIGDET polarity if necessary)
