82540EP — Networking Silicon
3.5
3.5.1PHYCrystalSignals
Symbol | Type | Name and Function |
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| Crystal One. The Crystal One pin is a 25 MHz +/- 50 ppm input signal. It can be |
XTAL1 | I | connected to either an oscillator or crystal. If a crystal is used, Crystal Two (XTAL2) |
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XTAL2 | O | Crystal Two. Crystal Two is the output of an internal oscillator circuit used to drive a |
crystal into oscillation. If an external oscillator is used in the design, XTAL2 must be | ||
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3.5.2Analog
Symbol | Type | Name and Function | |
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REF | P | Reference. This Reference signal should be connected to VSS through an external | |
2.49 KΩ resistor. | |||
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| Media Dependent Interface [0]. | |
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| configuration, MDI[0]+/- corresponds to | |
MDI[0]+/- | A | ||
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| configuration, MDI[0]+/- is used for the receive pair. | |
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| configuration, MDI[0]+/- is used for the receive pair. | |
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| Media Dependent Interface [1]. | |
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| configuration, MDI[1]+/- corresponds to | |
MDI[1]+/- | A | ||
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| configuration, MDI[1]+/- is used for the transit pair. | |
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| configuration, MDI[1]+/- is used for the transit pair. | |
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| Media Dependent Interface [2]. | |
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MDI[2]+/- | A | configuration, MDI[2]+/- corresponds to | |
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| Media Dependent Interface [3]. | |
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MDI[3]+/- | A | configuration, MDI[3]+/- corresponds to | |
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14 | Datasheet |
