ICS1893CYI-10LF View Datasheet(PDF) - Integrated Circuit Systems

Part Name

Description

MFG CO.

ICS1893CYI-10LF

3.3-V 10Base-T/100Base-TX Integrated PHYceiver™

Integrated Circuit Systems 

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ICS1893CY-10 - Release

Chapter 7 Management Register Set

7.13.2 Polarity Reversed (bit 18.14)

The Polarity Reversed bit is used to inform an STA whether the ICS1893CY-10 has detected that the

signals on the Twisted-Pair Receive Pins (TP_RXP and TP_RXN) are reversed. When the signal polarity

is:

• Correct, the ICS1893CY-10 sets bit 18.14 to a logic zero.

• Reversed, the ICS1893CY-10 sets bit 18.14 to logic one.

Note: The ICS1893CY-10 can detect this situation and perform all its operations normally, independent of

the reversal.

7.13.3 ICS Reserved (bits 18.13:6)

See Section 7.11.2, “ICS Reserved (bits 16.14:11)”, the text for which also applies here.

7.13.4 Jabber Inhibit (bit 18.5)

The Jabber Inhibit bit allows an STA to disable Jabber Detection. When an STA sets this bit to:

• Zero, the ICS1893CY-10 enables 10Base-T Jabber checking.

• One, the ICS1893CY-10 disables its check for a Jabber condition during data transmission.

7.13.5 ICS Reserved (bit 18.4)

See Section 7.11.2, “ICS Reserved (bits 16.14:11)”, the text for which also applies here.

7.13.6 Auto Polarity Inhibit (bit 18.3)

The Auto Polarity Inhibit bit allows an STA to prevent the automatic correction of a polarity reversal on the

Twisted-Pair Receive pins (TP_RXP and TP_RXN). If an STA sets this bit to logic:

• Zero (the default), the ICS1893CY-10 automatically corrects a polarity reversal on the Twisted-Pair

Receive pins.

• One, the ICS1893CY-10 either disables or inhibits the automatic correction of reversed Twisted-Pair

Receive pins.

Note:

The ICS1893CY-10 will not complete the Auto-MDIX function for an inverted polarity cable.

This is a rare event with modern manufactured cables. Full Auto-Negotiation and Auto

Polarity Correction will complete when the Auto-MDIX function is disabled. Software control

for the Auto-MDIX function is available in MDIO Register 19 Bits 9:8.

ICS1893CY-10 Rev 1/07

Copyright © 2007, Integrated Device Technology, Inc.

All rights reserved.

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