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LAN8741Ai-EN датащи(PDF) 38 Page - Microchip Technology |
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LAN8741Ai-EN датащи(HTML) 38 Page - Microchip Technology |
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38 / 106 page ![]() LAN8741A/LAN8741Ai DS00001988A-page 38 2013-2015 Microchip Technology Inc. 3.8.10.3 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 signals from the output of the transformer back to the receiver inputs. The loopback works at both 10 and 100 Mbps. FIGURE 3-11: CONNECTOR LOOPBACK BLOCK DIAGRAM Microchip 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. |
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