ICS1893CK ICST [Integrated Circuit Systems], ICS1893CK Datasheet - Page 15
ICS1893CK
Manufacturer Part Number
ICS1893CK
Description
3.3-V 10Base-T/100Base-TX Integrated PHYceive
Manufacturer
ICST [Integrated Circuit Systems]
Datasheet
1.ICS1893CK.pdf
(126 pages)
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4.8 Auto-MDI/MDIX Crossover (New)
ICS1893CF, Rev. F, 03/01/07
The ICS1893CF includes the auto-MDI/MDIX crossover feature. In a typical CAT 5 Ethernet installation the
transmit twisted pair signal pins of the RJ45 connector are crossed over in the CAT 5 wiring to the partners
receive twisted pair signal pins and receive twisted pair to the partners transmit twisted pair. This is usually
accomplished in the wiring plant. Hubs generally wire the RJ45 connector crossed to accomplish the
crossover. Two types of CAT 5 cables (straight and crossed) are available to achieve the correct
connection. The Auto-MDI/MDIX feature automatically corrects for miss-wired installations by automatically
swapping transmit and receive signal pairs at the PHY when no link results. Auto-MDI/MDIX is automatic,
but may be disabled for test purposes using the AMDIX_EN pin or by writing MDIO register 19 Bits 9:8 in
the MDIO register. The Auto-MDI/MDIX function is independent of Auto-Negotiation and preceeds
Auto-Negotiation when enabled.
ICS1893CF Data Sheet Rev. F - Release
Copyright © 2007, Integrated Device Technology, Inc.
All rights reserved.
15
Chapter 4 Operating Modes Overview
Mar. 2007
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