VSC8541-01 datasheet(53/100 Pages) MICROSEMI

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Registers

VMDS-10496 VSC8541-01 Datasheet Revision 4.2

4.2.25

Device Auxiliary Control and Status

monitored by other device registers. The following table shows the settings available and the expected

readouts.

4.2.26

LED Mode Select

The device LED outputs are controlled using the bits in register 29 of the main register space. The

following table shows the information needed to access the functionality of each of the outputs. For more

Table 46 •

Auxiliary Control and Status, Address 28 (0x1C)

Bit Name

Access Description

Default

Autonegotiation complete

Duplicate of bit 1.5 when auto-negotiation is

enabled, otherwise this is the current link

status.

Autonegotiation disabled

Inverted duplicate of bit 0.12.

HP Auto-MDIX crossover indication

1: HP Auto-MDIX crossover performed

internally.

CD pair swap

1: CD pairs are swapped.

A polarity inversion

1: Polarity swap on pair A.

B polarity inversion

1: Polarity swap on pair B.

C polarity inversion

1: Polarity swap on pair C.

D polarity inversion

1: Polarity swap on pair D.

ActiPHY link status time-out control [1] R/W

Sticky bit. Bits 7 and 2 are part of the ActiPHY

Link Status time-out control. Bit 7 is the MSB.

00: 2.3 seconds.

01: 3.3 seconds.

10: 4.3 seconds.

11: 5.3 seconds.

ActiPHY mode enable

R/W

Sticky bit.

1: Enabled.

FDX status

1: Full-duplex.

0: Half-duplex.

4:3 Speed status

00: Speed is 10BASE-T.

01: Speed is 100BASE-TX.

10: Speed is 1000BASE-T.

11: Reserved.

ActiPHY link status time-out control [0] R/W

Sticky bit. Bits 7 and 2 are part of the ActiPHY

Link Status time-out control. Bit 7 is the MSB.

00: 2.3 seconds.

01: 3.3 seconds.

10: 4.3 seconds.

11: 5.3 seconds.

1:0 Media mode status

00: No media selected.

01: Copper media selected.

10: Reserved.

11: Reserved.

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