1893CFLFT IDT, 1893CFLFT Datasheet - Page 79

• Manufacturer Part Number: 1893CFLFT
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT

Specifications of 1893CFLFT

• Rohs: yes
• Part # Aliases: ICS1893CFLFT

7.13.2 Polarity Reversed (bit 18.14)
7.13.3 ICS Reserved (bits 18.13:6)
7.13.4 Jabber Inhibit (bit 18.5)
7.13.5 ICS Reserved (bit 18.4)
7.13.6 Auto Polarity Inhibit (bit 18.3)
7.13.7 SQE Test Inhibit (bit 18.2)
ICS1893CK-40, Rev. C, 06/02/09
The Polarity Reversed bit is used to inform an STA whether the ICS1893CK-40 has detected that the
signals on the Twisted-Pair Receive Pins (TP_RXP and TP_RXN) are reversed. When the signal polarity
is:
•
•
Note:
See
The Jabber Inhibit bit allows an STA to disable Jabber Detection. When an STA sets this bit to:
•
•
See
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:
•
•
Note:
The SQE Test Inhibit bit allows an STA to prevent the generation of the Signal Quality Error pulse. When an
STA sets this bit to logic:
•
•
The SQE Test provides the ability to verify that the Collision Logic is active and functional. A 10Base-T SQE
test is performed by pulsing the Collision signal for a short time after each packet transmission completes,
that is, after TXEN goes inactive.
Note:
1. The SQE Test is automatically inhibited in full-duplex and repeater modes, thereby disabling the
Correct, the ICS1893CK-40 sets bit 18.14 to a logic zero.
Reversed, the ICS1893CK-40 sets bit 18.14 to logic one.
Zero, the ICS1893CK-40 enables 10Base-T Jabber checking.
One, the ICS1893CK-40 disables its check for a Jabber condition during data transmission.
Zero (the default), the ICS1893CK-40 automatically corrects a polarity reversal on the Twisted-Pair
Receive pins.
One, the ICS1893CK-40 either disables or inhibits the automatic correction of reversed Twisted-Pair
Receive pins.
Zero, the ICS1893CK-40 enables its SQE Test generation.
One, the ICS1893CK-40 disables its SQE Test generation.
functionality of this bit.
Section 7.11.2, “ICS Reserved (bits
Section 7.11.2, “ICS Reserved (bits
The ICS1893CK-40 can detect this situation and perform all its operations normally, independent
of the reversal.
The ICS1893CK-40 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.
ICS1893CK-40 Data Sheet Rev. C - Release
Copyright © 2009, Integrated Device Technology, Inc.
16.14:11)”, the text for which also applies here.
16.14:11)”, the text for which also applies here.
All rights reserved.
79
Chapter 7 Management Register Set
June 2009