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PM7366-PI Scheda tecnica(PDF) 168 Page - PMC-Sierra, Inc

Il numero della parte PM7366-PI
Spiegazioni elettronici  FRAME ENGINE AND DATA LINK MANAGER
PDF  286 Pages
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Produttore elettronici  PMC [PMC-Sierra, Inc]
Homepage  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7366-PI Scheda tecnica(HTML) 168 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
155
CACHE:
The transmit descriptor reference cache enable bit (CACHE) controls the frequency at which
TDRs are written to the TDR Free Queue. When CACHE is set high, freed TDRs are cache
and then written up to six at a time. When CACHE is set low, freed TDRs are written one at a
time.
TDQ_RDYN[2:0]:
The TDQ_RDYN[2:0] field sets the number of transmit descriptor references (TDRs) that
must be read from the TDR Ready Queue before the TDR Ready interrupt (TDQRDYI) is
asserted, as follows:
Table 22 – TDQ_RDYN[2:0] Settings
TDQ_RDYN[2:0]
No of TDRs
000
1
001
4
010
6
011
8
100
16
101
32
110
Reserved
111
Reserved
TDQ_FRN[1:0]:
The TDQ_FRN[1:0] field sets the number of times that a block of TDRs are written to the TDR
Free Queue from the TMACs internal cache before the TDR Free Queue Interrupt (TDQFI) is
asserted, as follows:
Table 23 – TDQ_FRN[1:0] Settings
TDQ_FRN[1:0]
No of Reads
00
1
01
4
10
8
11
Reserved



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