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TNETX4080GGP Datasheet(PDF) 49 Page - Texas Instruments

Part # TNETX4080GGP
Description  ThunderSWITCH IIE 8-PORT 10-/100-MBIT/S ETHERNETE SWITCH
PDF  64 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TNETX4080GGP Datasheet(HTML) 49 Page - Texas Instruments

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TNETX4080
ThunderSWITCH II™ 8-PORT 10-/100-MBIT/S ETHERNET™ SWITCH
SPWS050A – AUGUST 1998 – REVISED NOVEMBER 1998
49
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
duplex wrap test
Duplex wrap test is similar to internal wrap mode (see Figure 9). The ports can be set to accept frame data that
is wrapped at the PHY. This permits network connections between the device and the PHY to be verified. Any
port can be the source port (not just the NM port as shown in Figure 8). By using multicast/broadcast frames,
traffic can be routed selectively between ports involved in the test or return the frame directly before
retransmission on the uplink. Software control of the external PHYs is required to configure them for loopback.
Duplex frame-wrap test mode is selected by setting dpwrap in SysTest. When selected, the port is forced into
full duplex, allowing it to receive frames it transmits.
The switch is configured in the same manner as internal wrap.
TNETX4080
07
06
05
04
03
02
01
00
NM
PHY
PHY
Figure 9. Duplex Wrap Example



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