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Hey guys I am designing a PoE circuit board and the microcontroller that I want to use (PIC32MX795F512H) seems to be missing some pins to connect my data lines or it's not clear to me where the lines should go. From the Ethernet cable I need to connect TX+,TX-,RX+,RX- to the microcontroller but the datasheet doesn't indicate which pins are for positives and negative on the Ethernet transmit and receive port. What am I missing here?

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    \$\begingroup\$ The LAN8740 from Microchip makes this pretty easy, there are multiple reference designs available from Microchip, just look for the PIC32MX Starter Kit or the PIC32MX Discovery Board. \$\endgroup\$ – Ron Beyer Aug 14 at 3:14
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It can't be connected directly, you need a PHY chip to convert the MII interface to physical copper interface.

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  • \$\begingroup\$ Thanks. That is exactly what I was missing from my circuit. \$\endgroup\$ – be-ee Aug 13 at 22:42
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    \$\begingroup\$ @be-ee - Probably missing the magnetics too ... ? \$\endgroup\$ – brhans Aug 13 at 23:10
  • \$\begingroup\$ @brhans I have the transformer in the circuit, but thanks for the reminder! \$\endgroup\$ – be-ee Aug 14 at 1:51

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