VSC8541XMV-02 datasheet(30/101 Pages) MICROCHIP

30 / 101 page

Functional Descriptions

VMDS-10513 VSC8541-02 Datasheet Revision 4.1

The following table provides a summary of the LED modes and functions. The modes listed are

equivalent to the setting used in register 29 to configure each LED pin.

3.11.2

Basic Serial LED Mode

The VSC8541-02 device can be configured so that access to all its LED signals is available through two

pins. This option is enabled by setting LED0 to serial LED mode in register 29, bits 3:0 to 0xD. When

Table 14 •

LED Mode and Function Summary

Mode Function Name

LED State and Description

Link/Activity

1: No link in any speed on any media interface.

0: Valid link at any speed on any media interface.

Blink or pulse-stretch = Valid link at any speed on any media interface with activity

present.

Link1000/Activity

1: No link in 1000BASE-T.

0: Valid 1000BASE-T.

Blink or pulse-stretch = Valid 1000BASE-T link with activity present.

Link100/Activity

1: No link in 100BASE-TX.

0: Valid 100BASE-TX.

Blink or pulse-stretch = Valid 100BASE-TX link with activity present.

Link10/Activity

1: No link in 10BASE-T.

0: Valid 10BASE-T link.

Blink or pulse-stretch = Valid 10BASE-T link with activity present.

Link100/1000/Activity 1: No link in 100BASE-TX or 1000BASE-T.

0: Valid 100BASE-TX or 1000BASE-T link. Blink or pulse-stretch = Valid

100BASE-TX or 1000BASE-T link with activity present.

Link10/1000/Activity

1: No link in 10BASE-T or 1000BASE-T.

0: Valid 10BASE-T or 1000BASE-T link.

Blink or pulse-stretch = Valid 10BASE-T or 1000BASE-T link with activity present.

Link10/100/Activity

1: No link in 10BASE-T or 100BASE-TX.

0: Valid 10BASE-T or 100BASE-TX link.

Blink or pulse-stretch = Valid 10BASE-T or 100BASE-TX link with activity present.

Reserved

Reserved.

Duplex/Collision

1: Link established in half-duplex mode, or no link established.

0: Link established in full-duplex mode.

Blink or pulse-stretch = Link established in half-duplex mode but collisions are

present.

Collision

1: No collision detected.

Blink or pulse-stretch = Collision detected.

Activity

1: No activity present.

Blink or pulse-stretch = Activity present (becomes TX activity present when register

bit 30.14 is set to 1).

Reserved

Reserved.

Autonegotiation Fault 1: No auto-negotiation fault present.

0: Auto-negotiation fault occurred.

Serial Mode

Serial stream. See Basic Serial LED Mode, page 21. Only relevant on PHY port 0.

Reserved in others.

Force LED Off

1: De-asserts the LED1.

Setting this mode suppresses LED blinking after reset.

Force LED On

0: Asserts the LED1.

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