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LAN8710A-EZC 데이터시트(PDF) 43 Page - SMSC Corporation |
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LAN8710A-EZC 데이터시트(HTML) 43 Page - SMSC Corporation |
43 / 82 page Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology Datasheet SMSC LAN8710A/LAN8710Ai 43 Revision 1.4 (08-23-12) DATASHEET Collision Test is enabled in the Basic Control Register. The transmitters are powered down regardless of the state of TXEN. 3.8.9.2 Far Loopback Far loopback is a special test mode for MDI (analog) loopback as indicated by the blue arrows in Figure 3.11. The far loopback mode is enabled by setting the FARLOOPBACK bit of the Mode Control/Status Register to “1”. In this mode, data that is received from the link partner on the MDI is looped back out to the link partner. The digital interface signals on the local MAC interface are isolated. Note: This special test mode is only available when operating in RMII mode. 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 signals Figure 3.9 Near-end Loopback Block Diagram Figure 3.10 Far Loopback Block Diagram SMSC Ethernet Transceiver 10/100 Ethernet MAC CAT-5 XFMR Digital RXD TXD Analog RX TX X X Far-end system SMSC Ethernet Transceiver 10/100 Ethernet MAC CAT-5 XFMR Digital RXD TXD Analog RX TX Link Partner X X |
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