VSC8658 datasheet(56/95 Pages) MICROSEMI

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Configuration

VMDS-10242 VSC8658 Datasheet Revision 4.1

5.3.6

ActiPHY Control

signal, and its link speed downshifting feature. The following table shows the settings available.

Table 42 •

Extended PHY Control 3, Address 20E (0x14)

Bit

Name

Access

Description

Default

Disable carrier

extension

R/W

1 = Disable.

14:13

ActiPHY sleep timer

R/W

This is a sticky bit.

00 = 1 second.

01 = 2 seconds.

10 = 3 seconds.

11 = 4 seconds.

12:11

ActiPHY wake-up timer R/W

This is a sticky bit.

00 = 160 ms.

01 = 400 ms.

10 = 800 ms.

11 = 2 seconds.

10:9

Reserved

CLKOUT frequency (1)

Bit 8 is valid only on PHY_0.

R/W

This is a sticky bit.

1 = 156.25 MHz.

0 = 125 MHz.

CMODE

7:6

Media mode status

00 = No media selected.

01 = Copper media selected.

10 = SerDes media selected.

11 = Reserved.

Reserved

Enable link speed auto-

downshift feature

R/W

This is a sticky bit.

1 = Enable auto link speed downshift from

1000BASE-T.

CMODE

3:2

Link speed

auto-downshift control

R/W

This is a sticky bit.

00 = Downshift after 2 failed 1000BASE-T

auto-negotiation attempts.

01 = Downshift after 3 failed 1000BASE-T

auto-negotiation attempts.

10 = Downshift after 4 failed 1000BASE-T

auto-negotiation attempts.

11 = Downshift after 5 failed 1000BASE-T

auto-negotiation attempts.

Link speed

auto-downshift status

0 = No downshift.

1 = Downshift is required or has occurred.

Reserved

VSC8658 Datasheet(PDF) 56 Page - Microsemi Corporation

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