DP83950BVQB National Semiconductor, DP83950BVQB Datasheet - Page 33

• Manufacturer Part Number: DP83950BVQB
• Description: IC CTRLR RIC REPEATER 160-PQFP
• Manufacturer: National Semiconductor

Specifications of DP83950BVQB

• Controller Type: Ethernet Repeater Interface Controller
• Interface: IEEE 802.3
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 380mA
• 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: *DP83950BVQB

5 0 Functional Description
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-
Note In this example the Inter-RIC bus is configured to use active low signals
(Continued)
FIGURE 5 7 Transmit Collision
33
WAIT state has been performed
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
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
TL F 11096– 12