VSC8221 datasheet(24/138 Pages) MICROSEMI

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VSC8221

Data Sheet

VMDS-10106 Revision 4.1

December 2006

24 of 26

Table 12. Twisted Pair interface Signals

100

TFBGA

BALL

Signal

Name

Type

Description

TXVPA

ADiFF

TX/RX Channel “A” Positive Signal.

Positive differential signal connected to the positive primary side of the transformer. This

signal forms the positive signal of the “A” data channel. in all three speeds, this signal

generates the secondary side signal, normally connected to RJ-45 pin 1. in 100BASE-FX

mode, it is connected instead to the positive SFP transmit data signal (SFP_TD+). See

Section 9: “System Schematics” for details.

TXVNA

ADiFF

TX/RX Channel “A” Negative Signal.

Negative differential signal connected to the negative primary side of the transformer.

This signal forms the negative signal of the “A” data channel. in all three speeds, this

signal generates the secondary side signal, normally connected to RJ-45 pin 2. in

100BASE-FX mode, it is connected instead to the negative SFP transmit data signal

(SFP_TD–). See Section 9: “System Schematics” for details

TXVPB

ADiFF

TX/RX Channel “B” Positive Signal.

Positive differential signal connected to the positive primary side of the transformer. This

signal forms the positive signal of the “B” data channel. in all three speeds, this signal

generates the secondary side signal, normally connected to RJ-45 pin 3. in 100BASE-FX

mode, it is connected instead to the positive SFP receive data signal (SFP_RD+). See

Section 9: “System Schematics” for details.

TXVNB

ADiFF

TX/RX Channel “B” Negative Signal.

Negative differential signal connected to the negative primary side of the transformer.

This signal forms the negative signal of the “B” data channel. in all three speeds, this

signal generates the secondary side signal, normally connected to RJ-45 pin 6. in

100BASE-FX mode, it is connected instead to the negative SFP receive data signal

(SFP_RD–). See Section 9: “System Schematics” for details.

TXVPC

ADiFF

TX/RX Channel “C” Positive Signal.

Positive differential signal connected to the positive primary side of the transformer. This

signal forms the positive signal of the “C” data channel. in 1000Mb mode, this signal

generates the secondary side signal, normally connected to RJ-45 pin 4 (not used in 10M/

100M modes). See Section 9: “System Schematics” for details.

TXVNC

ADiFF

TX/RX Channel “C” Negative Signal.

Negative differential signal connected to the negative primary side of the transformer.

This signal forms the negative signal of the “C” data channel. in 1000Mb mode, this signal

generates the secondary side signal, normally connected to RJ-45 pin 5 (not used in the

10M/100M modes). See Section 9: “System Schematics” for details.

TXVPD

ADiFF

TX/RX Channel “D” Positive Signal.

Positive differential signal connected to the positive primary side of the transformer. This

signal forms the positive signal of the “D” data channel. in 1000Mb mode, this signal

generates the secondary side signal, normally connected to RJ-45 pin 7 (not used in the

10M/100M modes). See Section 9: “System Schematics” for details.

TXVND

ADiFF

TX/RX Channel “D” Negative Signal.

Negative differential signal connected to the negative primary side of the transformer.

This signal forms the negative signal of the “D” data channel. in 1000Mb mode, this signal

generates the secondary side signal, normally connected to RJ-45 pin 8 (not used in the

10M/100M modes). See Section 9: “System Schematics” for details.

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