L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 46

• Manufacturer Part Number: L-ET4148-50C-DB
• Manufacturer: LSI

Specifications of L-ET4148-50C-DB

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ET4148-50
Preliminary Data Sheet
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
April 2006
Functional Description
(continued)
Supervisor Packet Transmission
(continued)
Packet Transmission Process (continued)
Pairs of 32-bit words are read from Supervisor_Tx_Descriptor in order to determine the location and byte
count of each of the packet’s segments. If Supervisor_Tx_Descriptor.last is asserted, then the current
segment is the last segment of the packet.
The ET4148-50 reads the packet segments in the order in that their descriptors appear in
Supervisor_Tx_Descriptor. The first segment of every transmit packet contains the destination port map
and priority information for the packet.
The packet segments are stored as a contiguous packet within the ET4148-50 in the normal manner and queued
for transmission utilizing the supplied destination information.
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Agere Systems Inc.
Agere Systems - Proprietary