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PM7367 Arkusz danych(PDF) 72 Page - PMC-Sierra, Inc

Numer części PM7367
Szczegółowy opis  FRAME ENGINE AND DATA LINK MANAGER
PDF  323 Pages
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Producent  PMC [PMC-Sierra, Inc]
Strona internetowa  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7367 Arkusz danych(HTML) 72 Page - PMC-Sierra, Inc

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PM7367 FREEDM-32P32
DATA SHEET
PMC-1991499
ISSUE 2
FRAME ENGINE AND DATA LINK MANAGER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE
58
Figure 11 – Transmit Descriptor Table
TDTB[31:4] = Tx Descriptor Table Base register
TDR[13:0] = Transmit Descriptor Reference
TD_ADDR[31:0] = Transmit Descriptor Address
TDTB
Bit 0
Bit 31
TD_ADDR
TD1
TD2
TD 16384
Dword 0
Dword 1
Dword 2
Dword 3
TDTB[31:4]
TDR[13:0]
Bit 31
Bit 0
+
=
TD_ADDR[31:0]
Dword 0
Dword 0
0000
0000
Dword 3
Dword 3
Transmit Queues
Pointers to the transmit descriptors (TDs) containing packet(s) ready for
transmission are passed from the host to the TMAC using the Transmit
Descriptor Reference Ready (TDRR) queue, which resides in host memory.
Pointers to transmit descriptor structures whose buffers have been read by the
TMAC are passed from the TMAC to the host using the Transmit Descriptor
Reference Free (TDRF) queue, which also resides in host memory. The TMAC
contains a Free Queue cache which can store up to six TDRs. If caching is



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