Datasheet

 2016 Microchip Technology Inc. DS00002164B-page 37
LAN8710A/LAN8710AI
3.8.9.3 Connector Loopback
The device maintains reliable transmission over very short cables, and can be tested in a connector loopback as shown
in Figure 3-11. An RJ45 loopback cable can be used to route the transmit sign
als an the output of the transformer back
to the receiver inputs, and this loopback will work at both 10 and 100.
FIGURE 3-11: CONNECTOR LOOPBACK BLOCK DIAGRAM
SMSC
Ethernet Transceiver
10/100
Ethernet
MAC
XFMR
Digital
RXD
TXD
Analog
RX
TX
1
2
3
4
5
6
7
8
RJ45 Loopback Cable.
Created by connecting pin 1 to pin 3
and connecting pin 2 to pin 6.
3.9 Application Diagrams
This section provides typical application diagrams for the following:
• Simplified System Level Application Diagram
• Power Supply Diagram (1.2V Supplied by Internal Regulator)
• Power Supply Diagram (1.2V Supplied by External Source)
• Twisted-Pair Interface Diagram (Single Power Supply)
• Twisted-Pair Interface Diagram (Dual Power Supplies)