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TC3097-8 Datasheet PDF : 35 Pages
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TC3097-8
Preliminary Data Sheet
2.3.2 AUI Port Auto-Partition State Diagram
A partition state machine is implemented for each AUI port. Individual Tw5 and Tw6 timers and collision
counters are implemented for each state machine.
2.3.2.1 State Diagram Notation and Variables.
=
&
+
{[term]}
Y
CC(Y)
DIPresent(Y)
Datain(Y)
CIPresent(Y)
Collin(Y)
/COLN
/ANYXN
Tw5
Tw6
Assign the right side constant or expression result to the left side variable.
Logical ”AND” operator.
Logical ”OR” operator when used in a state-exiting expression. Arithmetic addition when
used otherwise.
Group term for logical evaluation.
Number identifier for the particular AUI port.
Values: Integers 0 and 1
Consecutive collision count for AUI port Y
Values: Integers from 0 to 31
Carrier from the MAU on AUI port Y.
Values: Idle-Port carrier is not active.
Active-Port carrier is active.
AUI port carrier to the global state machine.
Values: Idle-Port carrier has been gated off by the partition state machine.
DIPresent(Y)-Port carrier is passed on to the global state machine.
Collision indication from the MAU on AUI Port Y.
Values: /SQE-Port collision is not active.
SQE-Port collision is active.
AUI port collision to the global state machine.
Values: /SQE-Port collision has been gated off by the partition state machine.
CIPresent(Y)-Port collision is passed on to the global state machine.
Inter-LEMRIC that is Port N or Port M collision.
Values: Idle-/COLN is not active.
Active-/COLN is active.
Inter-LEMRIC that is not Port N or Port M collision.
Values: Idle-/ANYXN is not active.
Active-/ANYXN is active.
Enable Tw5 initializes and starts the PORT Tw5 timer. Tw5Done indicates that the timer
has expired.
Enable Tw6 initializes and starts the port Tw6 timer. /Tw6Done indicates that the timer is
running. Tw6Done indicates that the timer has expired.
Confidential.
Copyright © 2003, IC Plus Corp.
10/35
July 21. 2003
TC3097-8-DS-R24
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