VSC8504-02 datasheet(71/131 Pages) MICROSEMI

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Registers

VMDS-10507 VSC8504-02 Datasheet Revision 4.2

4.2.27

LED Behavior

The bits in register 30 control and enable you to read the status of the pulse or blink rate of the device

LEDs. The following table shows the settings you can write to the register or read from the register.

Table 45 •

LED Behavior, Address 30 (0x1E)

Bit

Name

Access Description

Default

Copper and fiber

LED combine disable

R/W

Sticky bit

0: Combine enabled (Copper/Fiber on

link/linkXXXX/activity LED)

1: Disable combination (link/linkXXXX/activity

LED; indicates copper only)

Activity output select R/W

Sticky bit

1: Activity LED becomes TX_Activity and fiber

activity LED becomes RX_Activity

0: TX and RX activity both displayed on activity

LEDs

Reserved

LED pulsing enable

R/W

Sticky bit

0: Normal operation

1: LEDs pulse with a 5 kHz, programmable duty

cycle when active

11:10

LED blink/pulse-

stretch rate

R/W

Sticky bit

00: 2.5 Hz blink rate/400 ms pulse-stretch

01: 5 Hz blink rate/200 ms pulse-stretch

10: 10 Hz blink rate/100 ms pulse-stretch

11: 20 Hz blink rate/50 ms pulse-stretch

The blink rate selection for PHY0 globally sets

the rate used for all LED pins on all PHY ports

Reserved

LED3 pulse-

stretch/blink select

R/W

Sticky bit

1: Pulse-stretch

0: Blink

LED2 pulse-

stretch/blink select

R/W

Sticky bit

1: Pulse-stretch

0: Blink

LED1 pulse-

stretch/blink select

R/W

Sticky bit

1: Pulse-stretch

0: Blink

LED0 pulse-

stretch/blink select

R/W

Sticky bit

1: Pulse-stretch

0: Blink

Reserved

3LED3 combine

feature disable

R/W

Sticky bit

0: Combine enabled (link/activity,

duplex/collision)

1: Disable combination (link only, duplex only)

2LED2 combine

feature disable

R/W

Sticky bit

0: Combine enabled (link/activity,

duplex/collision)

1: Disable combination (link only, duplex only)

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