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DP83950B Datasheet(PDF) 33 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83950B
Description  RIC??Repeater Interface Controller
PDF  80 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83950B Datasheet(HTML) 33 Page - National Semiconductor (TI)

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50 Functional Description (Continued)
on the network (this may be deduced since ANYXN is inac-
tive) so the repeater will move to the
ONE PORT LEFT
state The RIC system treats this state in a similar manner to
a receive collision with
PORT M fulfilling the role of the re-
ceiving port The difference from a true receive collision is
that the switch from packet data to the jam pattern has
already been made (controlled by ANYXN) Thus the state
of COLN has no effect upon repeater operations In com-
mon with the operation of the
RECEIVE COLLISION state
the repeater remains in this condition until the collision and
receive activity on
PORT M sibsides The packet repetition
operation completes when the
Tw1 recovery time in the
WAIT state has been performed
Note
In transmit collision conditions COLN will only go active if the RIC
which contained
PORT N at the start of packet repetition contains PORT M
during the
TRANSMIT COLLISION and ONE PORT LEFT states
TLF11096 – 12
Note
In this example the Inter-RIC bus is configured to use active low signals
FIGURE 57 Transmit Collision
33



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