VSC8658 datasheet(64/95 Pages) MICROSEMI

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Configuration

VMDS-10242 VSC8658 Datasheet Revision 4.1

MAC

auto-negotiation

bit 13

0 = Disabled.

1 = Enabled.

ActiPHY

bit 6

0 = Disabled.

1 = Enabled.

Advertise

asymmetric pause

bit 11

0 = Not advertised.

1 = Advertised.

Advertise symmetric

pause

bit 10

0 = Not advertised.

1 = Advertised.

Media interface [2:0] Register 23,

bits 10:8

5, 4, 3

000 = Cat5 copper only.

001 = SerDes Fiber/SFP Pass-Through mode only. No

auto-negotiation performed in the PHY.

010 = 1000BASE-X Fiber/SFP mode only with auto-

negotiation performed by the PHY.

011 = 100BASE-X Fiber/SFP mode on the fiber media pins

only.

101 = Auto-media sense with Cat5 media or SerDes

Fiber/SFP Pass-Through mode.

110 = Auto-media sense with Cat5 media or 1000BASE-X

Fiber/SFP mode with auto-negotiation performed by PHY.

111 = Auto-media sense with Cat5 media or 100BASE-FX

Fiber/SFP mode.

100 = Reserved.

SIGDET polarity

bit 0

0 = Active high.

1 = Active low.

Clock speed

bit 8

0 = 125 MHz.

1 = 156.2 MHz.

CLKOUT enable

bit 0

0 = Disabled.

1 = Enabled.

LED fiber/copper

combine

bit 15

0 = Combine enabled (Copper/Fiber on

Link/LinkXXXX/Activity LED).

1 = Disable combination (Link/LinkXXXX/Activity LED

indicates copper only).

LED blink/pulse

stretch rate

bits 11:10

1 and 0 00 = 2.5 Hz blink rate, 400 ms pulse stretch.

01 = 5.0 Hz blink rate, 200 ms pulse stretch.

10 = 10.0 Hz blink rate, 100 ms pulse stretch.

11 = 20.0 Hz blink rate, 50 ms pulse stretch.

LED_3, LED_2,

LED_1, and LED_0

combine or separate

bits 3:0

3, 2, 1,

and 0

0 = Link, Link10, Link100, Link1000, Link10/100,

Link10/1000, Link100/1000.

LEDs blink or flash when activity is present.

Also, a duplex LED blinks or flashes when collision is

present.

1 = Link, Link10, Link100, Link1000, Link10/100,

Link10/1000, Link100/1000.

LEDs indicate status only.

Also, a duplex LED indicates a duplex status only.

LED_3 indication

function

bits 15:12

1 and 0 00 = Duplex or collision.

01 = Link100 or activity.

10 = Activity.

11 = Fiber_Link/Fiber_Activity.

Table 59 •

Device Functions and Associated CMODE Pins (continued)

Function

Sets MII

CMODE

Bit

Description

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