82573 Datasheet, PDF (14/39 Pages) Intel Corporation – GbE Controllers

82573—Datasheet
2.6
PHY Analog and Crystal Signals
Signal
MDI0n
MDI0p
MDI1n
MDI1p
MDI2n
MDI2p
MDI3n
MDI3p
PHY_REF
XTAL1
XTAL2
Type
Name and Function
Media Dependent Interface [0]
1000BASE-T:
In MDI configuration, MDIp0/MDIn0 corresponds to BI_DA+/-, and in MDI-X
configuration, MDIp0/MDIn0 corresponds to BI_DB+/-.
A
100BASE-TX:
In MDI configuration, MDIp0/MDIn0 is used for the transmit pair, and in MDI-X
configuration, MDIp0/MDIn0 is used for the receive pair.
10BASE-T:
In MDI configuration, MDIp0/MDIn0 is used for the transmit pair, and in MDI-X
configuration, MDIp0/MDIn0 is used for the receive pair.
Media Dependent Interface [1]
1000BASE-T:
In MDI configuration, MDIp1/MDIn1 corresponds to BI_DB+/-, and in MDI-X
configuration, MDIp1/MDIn1 corresponds to BI_DA+/-.
A
100BASE-TX:
In MDI configuration, MDIp1/MDIn1 is used for the receive pair, and in MDI-X
configuration, MDIp1/MDIn1 is used for the transmit pair.
10BASE-T:
In MDI configuration, MDIp1/MDIn1 is used for the receive pair, and in MDI-X
configuration, MDIp1/MDIn1 is used for the transmit pair.
Media Dependent Interface [2]
1000BASE-T:
In MDI configuration, MDIp2/MDIn2 corresponds to BI_DC+/-, and in MDI-X
configuration, MDIp2/MDIn2 corresponds to BI_DD+/-.
A
100BASE-TX:
Unused.
10BASE-T:
Unused.
Media Dependent Interface [3]
1000BASE-T:
In MDI configuration, MDIp3/MDIn3 corresponds to BI_DD+/-, and in MDI-X
configuration, MDIp3/MDIn3 corresponds to BI_DC+/-.
A
100BASE-TX:
Unused.
10BASE-T:
Unused.
Reference Input
A
This signal is used as the analog reference input for the PHY. It should be
connected to a pull-down, 4.99 K Ω, 1% resistor.
Crystal One
I
The Crystal One pin is a 25 MHz input signal. It should be connected to a parallel
resonant crystal with a frequency tolerance of 30 ppm. The other end of the crystal
should be connected to XTAL2.
Crystal Two
O
Crystal Two is the output of an internal oscillator circuit used to drive a crystal into
oscillation.
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