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PM7366-PI датащи(PDF) 59 Page - PMC-Sierra, Inc

номер детали PM7366-PI
подробное описание детали  FRAME ENGINE AND DATA LINK MANAGER
PDF  286 Pages
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производитель  PMC [PMC-Sierra, Inc]
домашняя страница  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7366-PI датащи(HTML) 59 Page - PMC-Sierra, Inc

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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
46
Figure 7 – RPDRR Queue Operation
Rx Packet Descriptor Reference Ready Queue
Bit 0
Bit 31
STATUS + RPDR
RPDRRQ_START_ADDR
RPDRRQ_END_ADDR
RPDRRQ_READ_ADDR
RPDRRQ_WRITE_ADDR
STATUS + RPDR
STATUS + RPDR
RPD - 16 bytes
RPD - 16 bytes
RPD - 16 bytes
RPD - 16 bytes
RPD - 16 bytes
buffer
-packet M
buffer
-packet N
buffer
-start of
packet O
buffer
-middle of
packet O
buffer
-end of
packet O
Receive Channel Descriptor Reference Table
On a per-channel basis, the RMAC caches information such as the current DMA information in a
Receive Channel Descriptor Reference (RCDR) Table. The RMAC can process 128 channels
and stores three dwords of information per channel. This information is cached internally in order
to decrease the number of host bus accesses required to process each data packet. The
structure of the RCDR table is shown in Figure 8.



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