RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
R_UNDERRUNS Word Format (13H)
This word is read-only and is maintained by the RALP
Field (Bits)
Description
16-bit rollover count of the occurrences of an
R_UNDERRUNS
(15:0)
underrun on this queue. This is the
atmfCESBufUnderflows counter. Initialize to 0.
Once initialized, do not write to this word. Underruns
are counted by the RALP, which does not know an
underrun occurred until a cell is received while in
underrun. To ensure the underrun count is correct,
the counter is not incremented until the queue exits
the underrun state and enters the resume state
underrun condition. To determine if the queue is in
underrun, check the level of the R_UNDERRUN bit
in R_LINE_STATE register. If this bit is set, then
increment the underrun count by one to get the
current count. This counter does not count
underruns which are the result of a
FORCED_UNDERRUN.
R_LOST_CELLS Word Format (14H)
This word is read-only and is maintained by the RALP
Field (Bits)
Description
R_LOST_CELLS
(15:0)
16-bit rollover count of cells that were detected as
lost. This is the atmfCESLostCells counter in the
CES specification. Initialize to 0. Once initialized, do
not write to this word.
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL
231
PMC [ PMC-SIERRA, INC ]
