PM7384 FREEDM-84P672
DATA SHEET
PMC-1990445
ISSUE 5
FRAME ENGINE AND DATA LINK MANAGER 84P672
RPQ_LFN[1:0]:
The RPQ_LFN[1:0] field sets the number of times that a block of RPDRs are
read from the Large Buffer Free Queue to the RMAC672s internal cache
before the RPDR Large Buffer Free Queue interrupt (RPQLFI) is asserted, as
follows:
Table 28 – RPQ_LFN[1:0] Settings
RPQ_LFN[1:0]
No of Reads
00
01
10
11
1
4
8
Reserved
If the value of RPQ_LFN[1:0] is altered, the new value does not become
effective until after the RPQLFI interrupt is next generated.
RPQ_SFN[1:0]:
The RPQ_SFN[1:0] field sets the number of times that a block of RPDRs are
read from the Small Buffer Free Queue to the RMAC672s internal cache
before the RPDR Small Buffer Free Queue interrupt (RPQSFI) is asserted, as
follows:
Table 29 – RPQ_SFN[1:0] Settings
RPQ_SFN[1:0]
No of Reads
00
01
10
11
1
4
8
Reserved
If the value of RPQ_SFN[1:0] is altered, the new value does not become
effective until after the RPQSFI interrupt is next generated.
Reserved:
The reserved bit must be set low for correct operation of the FREEDM-
84P672 device.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
162
PMC [ PMC-SIERRA, INC ]
