VSC8504-02 datasheet(70/131 Pages) MICROSEMI

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Registers

VMDS-10507 VSC8504-02 Datasheet Revision 4.2

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

information about LED modes, see Table 7, page 26. For information about enabling the extended LED

mode bits in Register 19E1 bits 13 to 12, see Table 8, page 27.

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 or 100BASE-FX

10: Speed is 1000BASE-T or 1000BASE-X

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: SerDes (Fiber) media selected

11: Reserved

In 1000BT mode, if Force MDI crossover is performed while link is up, the 1000BT link must be re-negotiated

in order for this bit to reflect the actual Auto-MDIX setting.

Table 44 •

LED Mode Select, Address 29 (0x1D)

Bit

Name

Access Description

Default

15:12 LED3 mode select R/W

Sticky bit. Select from LED modes 0–15.

1000

11:8

LED2 mode select R/W

Sticky bit. Select from LED modes 0–15.

0000

7:4

LED1 mode select R/W

Sticky bit. Select from LED modes 0–15.

0010

3:0

LED0 mode select R/W

Sticky bit. Select from LED modes 0–15.

0001

Table 43 •

Auxiliary Control and Status, Address 28 (0x1C) (continued)

Bit Name

Access Description

Default

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