DP83953VUL National Semiconductor, DP83953VUL Datasheet - Page 18

• Manufacturer Part Number: DP83953VUL
• Description: IC CTRLR RIC REPEATER 160-PQFP
• Manufacturer: National Semiconductor

Specifications of DP83953VUL

• Controller Type: Ethernet Repeater Interface Controller
• Interface: IEEE 802.3
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 870mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-MQFP, 160-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83953VUL

4.0 Functional Description
The IRB connects multiple RIC2As to realize the following
operations:
Bus Signal
Inter-RIC
ANYXN
Port N Identification (which port the repeater receives
data from)
Port M Identification (which port last experienced a colli-
sion)
Data Transfer
RECEIVE COLLISION identification
ACKO
ACTN
COLN
ACKI
IRE
IRD
IRC
Input signal to The PSM arbitration
chain. This chain is employed to
identify PORT N and PORT M .
Note: A RIC2A which contains PORT N or
PORT M may be identified by its
nal being low when its
Output signal from the PSM arbi-
tration chain.
This signal denotes there is activity
on PORT N or PORT M.
This signal denotes that a repeater
port that is not PORT N or PORT M
is experiencing a collision.
Denotes PORT N or PORT M is ex-
periencing a collision.
This signal acts as an activity fram-
ing signal for the IRC and IRD sig-
nals.
Decoded serial data, in NRZ for-
mat, received from the network
segment attached to PORT N.
Clock signal associated with IRD
and IRE.
Function
ACKI
input is high.
(Continued)
ACKO
sig-
Not applicable
If this RIC2A contains port N, then
the device will assert this signal.
A RIC2A must contain PORT N or
PORT M.
Note: Although this signal normally has only
one source asserting the signal active it is used
in a wired-or configuration.
Any RIC2A which satisfies the above
condition.
Note: This bus line is used in a wired-or config-
uration.
A RIC2A must contain PORT N or
PORT M.
A RIC2A must contain PORT N.
A RIC2A must contain PORT N.
A RIC2A must contain PORT N.
Conditions Required for a RIC2A
to Drive this Signal
18
The following table briefly describes the operation of the
Inter-RIC bus signals, the conditions required for a RIC2A
to assert a signal, and which RIC2As (in a multi-RIC2A
system) would monitor the signal.
TRANSMIT COLLISION identification
DISABLE OUTPUT (jabber protection)
This is dependent upon the
method used to cascade
RIC2As, described in a follow-
ing section.
This is dependent upon the
method used to cascade
RIC2As, described in a follow-
ing section.
The signal is monitored by all
RIC2As in the repeater system.
The signal is monitored by all
RIC2As in the repeater system.
The signal is monitored by all
other RIC2As in the repeater
system.
The signal is monitored by all
other RIC2As in the repeater
system.
The signal is monitored by all
other RIC2As in the repeater
system.
The signal is monitored by all
other RIC2As in the repeater
system.
RIC2A Receiving the Signal
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