PM3350-SW datasheet(107/224 Pages) PMC

107 / 224 page

ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

105

Frame receive begins

DMA allocates PB

Frame header received

DMA looks up MAC addresses

Frame receive done

DMA flushes FIFO & interrupts

Switch Processor

Allocate and create DD

Increment work queue counter

Work queue interrupt

Source address checked

Destination address checked

Frame type classified (unicast or

broadcast)

Attach frame to transmit queue(s)

Decrement port buffer count

Initiate frame transmit

DMA begins transmitting frame

Frame transmit complete; DMA

interrupts Switch Processor

Read DD and check reference

count in PB

Free DD to free pool

Free PB chain to free pool

Increment source port buffer count

Update source port/MAC stats

Update destination port statistics

Read information from DMA

registers

Update destination MAC

statistics

Receive Process

Switching Process

Transmit Process

DMA

Firmware

DMA

Firmware

Attach DD to work queue

PM3350-SW Datasheet(PDF) 107 Page - PMC-Sierra, Inc

PM3350-SW Datasheet(HTML) 107 Page - PMC-Sierra, Inc

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