DP83955AV National Semiconductor, DP83955AV Datasheet - Page 28
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DP83955AV
Manufacturer Part Number
DP83955AV
Description
IC CTRLR RIC REPEATER 100-PQFP
Manufacturer
National Semiconductor
Series
LERIC™r
Datasheet
1.DP83955AV.pdf
(54 pages)
Specifications of DP83955AV
Controller Type
LitE Repeater Interface Controller
Voltage - Supply
5V
Current - Supply
250mA
Mounting Type
Surface Mount
Package / Case
84-LCC (J-Lead)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Operating Temperature
-
Interface
-
Other names
*DP83955AV
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DP83955AV
Manufacturer:
NS/国半
Quantity:
20 000
5 0 Functional Description
Jabber Protection
A repeater is required to disable transmit activity if the
length of its current transmission reaches the jabber protect
limit This is defined by the IEEE specification’s Tw3 time
The repeater disables output for a time period defined by
the Tw4 specification after this period normal operation
may resume
Protection state diagram
Note 1 The IEEE Specification does not have a jabber protect state defined in its main state diagram this behavior is defined in an additional MAU Jabber Lockup
(Continued)
FIGURE 5-7 Jabber Protect
28
Figure 5-7 shows the effect of a jabber length packet upon a
LERIC based repeater system The JABBER PROTECT
state is entered from the SEND DATA state While the Tw4
period is observed the Inter-LERIC bus displays the IDLE
state This is misleading since new packet activity or contin-
uous activity (as shown in the diagram) does not result in
packet repetition This may only occur when the Tw4 re-
quirement has been satisfied
TL F 11240 – 13