VSC8221 datasheet(97/138 Pages) MICROSEMI

97 / 138 page

VSC8221

Data Sheet

VMDS-10106 Revision 4.1

December 2006

97 of 106

106

30.13:12 - MAC Remote Fault

Bits 30.13:12 correspond to the Remote Fault bits sent to the VSC8221 by the MAC during the clause 37 auto-negotiation

process.

30.11 - MAC Asymmetric Pause

Bit 30.11 corresponds to the Asymmetric Pause bit sent to the VSC8221 by the MAC during the clause 37 auto-negotiation

process.

30.10 - MAC Symmetric Pause

Bit 30.10 corresponds to the Symmetric Pause bit sent to the VSC8221 by the MAC during the clause 37 auto-negotiation

process.

30.9 - Clause 37 Restart Auto-Negotiation

When bit 30.9 is set to a “1”, the clause 37 auto-negotiation process is restarted. This bit is self-clearing and always reads back

as “0”.

30.8 - MAC Full Duplex

Bit 30.8 corresponds to the Full Duplex Ability bit sent to the VSC8221 by the MAC during the clause 37 auto-negotiation

process.

30.7 - MAC Half Duplex

Bit 30.7 corresponds to the Half Duplex Ability bit sent to the VSC8221 by the MAC during the clause 37 auto-negotiation

process.

30.6 - Reserved

30.5 - Clause 37 Auto-Negotiation Complete

When bit 30.5 is set to a “1”, the clause 37 auto-negotiation has completed successfully.

30.4 - Reserved

30.3 - Link interlock Fail

Bit 30.3 is set to indicate a failure to complete interlock between Clause-37 auto-negotiation and Clause-28 auto-negotiation.

This bit is valid only in SerDes to CAT5 PHY operating modes.

30.2 - Link interlock Complete

Bit 30.2 is set to indicate a complete interlock between Clause-37 auto-negotiation and Clause-28 auto-negotiation. This bit is

valid only in SerDes to CAT5 PHY operating modes.

30.1:0 - RXLOS Pulse Delay

Bits 30.1:0 specify the RXLOS Pulse Delay. it sets the time the RXLOS/SiGDET signal pin is asserted when the CAT5 Media

Link is dropped. This bit is only valid when the ‘SFP Mode’ bit Extended Mii Register 21E.15 = “1”.

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