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PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7340 S/UNI-IMA-8
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
157
a link within the group. This threshold
will be used in determining if links are
acceptable for adding to a group.
16:11
RESERVED
10
RX_ADD_DELAY_E
N
Receive IMA group delay-adding
enable. When enabled, the RIPP will
roll back the RDAT read pointers,
which effectively adds more delay to
the group, in order to accommodate
the new link if it is necessary.
‘0’: disabled.
‘1’: enabled.
9:0
RX_DELAY_GUAR
D_BAND
Receive IMA group link differential
delay guard-band value. This is the
suggested distance between RDAT
cell write pointer on the slowest link
and the RDAT cell read pointer
(expressed in the unit of cells), which
is set by RIPP when it activates the
RX data path during group start-up
Note that this is only a recommended
behavior; if necessary, RIPP may
choose to not to maintain this guard
band in order to accept a slow link.
4
31:0
RESERVED
5:15
31:0
RX_PHY_TABLE
This table contains the physical link
numbers of all RX links assigned to
the group by PM. The table has 32
entries that are packed into 11 32-bit
words; each entry corresponds to one
RX link. The order of links in the table
is determined by PM prior to group
start-up, and is not related to the LIDs
or physical link numbers. See Table 9
for the detailed bit mapping.
Note that this table needs to be
configured identical to the
TX_PHY_TABLE if the group is