ICS1893BY-10 - Release
Chapter 5 Interface Overviews
5.7 Configuration Interface
The following Configuration and Status Interface pins allow the ICS1893BY-10 to be completely configured
and controlled in hardware mode:
• 10/100SEL
• ANSEL
• DPXSEL
• HW/SW
• MII/SI
• NOD/REP
• RESETn
• RXTRI
These pins allow the ICS1893BY-10 to accommodate the following:
• 10M or 100M operations
• Four MAC/Repeater Interface configurations:
– 10M MII
– 100M MII
– 100M Symbol
– 10M Serial
• Node or repeater applications
• Full-duplex or half-duplex data links
In addition to the ISO/IEC-specified, MII control signals, the ICS1893BY-10 provides RXTRI, which is a
tri-state enable pin for the MII receive data path. When this pin is active (that is, a logic one), the following
pins are tri-stated:
• RXCLK
• RXD[3:0]
• RXDV
• RXER
Functionally, the RXTRI pin affects the MII receive channel in the same way as the Control Register’s
isolate bit, bit 0.10. (The isolate bit also affects the transmit data path.) The ICS1893BY-10 can tri-state
these seven signals for all five types of MAC/Repeater Interface configurations, not just the MII interface.
ICS1893BY-10 Rev A 3/24/04
March, 2004
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
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ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
