VSC8489/VSC8490/VSC8491 Evaluation Board
VPPD-03745 VSC8489/VSC8490/VSC8491 User Guide Revision 1.0
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Figure 7 • GUI: Routing Page
5.7
BIST
The VSC8489 family of devices support two different built in self test (BIST) types. The first is an
unframed PRBS31 pattern as described in section 50.3.8 of IEEE 802.3ae. The second is a packet based
BIST. Each channel has its own BIST and the channel can be selected from the drop down selection box
in the upper right. Figure 8 gives an example of the Packet BIST. The user must first enable the packet
BIST by checking the
box in the upper right.
Enable
On the TX side, clicking
will display both the Current Count (amount sent since the last Read) and
Read
the Cumulative Count (amount sent since Start). Clicking
will disable the packet transmission.
Stop
On the RX side, there are options to read the count of Good Packets, Bad Packets, Fragments, Local
Faults and the Bit Error Rate. These counters behave in the same manner as the TX side.
