PM7366-PI datasheet(77/286 Pages) PMC

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PM7366-PI Datasheet(PDF) 77 Page - PMC-Sierra, Inc

Part #	PM7366-PI

Description	FRAME ENGINE AND DATA LINK MANAGER

PDF	286 Pages

Scroll/Zoom	100%

Manufacturer	PMC [PMC-Sierra, Inc]

Direct Link	http://www.pmc-sierra.com

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77 / 286 page

RELEASED

PM7366 FREEDM-8

DATA SHEET

PMC-1970930

ISSUE 4

FRAME ENGINE AND DATA LINK MANAGER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

Transmit Descriptor Linking

As described above, the TCDR table contains pointers which the TMAC uses to construct linked

lists of data packets to be transmitted. After the host places a new TDR in the TDR Ready queue,

the TMAC retrieves the TDR and links it to the TD pointed at by the Last TD Pointer field. The

TMAC may create up to 256 linked lists, viz. a high-priority list and a low-priority list for each DMA

channel. Whenever a new data packet is requested by the downstream block, the TMAC picks a

packet from the high-priority linked list unless it is empty, in which case, a packet from the low-

priority linked list is used.

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