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PM73121 Datasheet(PDF) 37 Page - PMC-Sierra, Inc |
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PM73121 Datasheet(HTML) 37 Page - PMC-Sierra, Inc |
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37 / 223 page  PM73121 AAL1gator II PMC-Sierra, Inc. PMC-980620 ,VVXH AAL1 SAR Processor Data Sheet QSPQSD@U6S`Ã6I9Ã8PIAD9@IUD6GÃUPÃQH8TD@SS6ÃDI8Ã6I9ÃAPSÃDUTÃ8VTUPH@ST¶ÃDIU@SI6GÃVT@ Sticky bits for the following events are also maintained on a per-queue basis in memory (refer to “R_ERROR_STKY Word Format” on page 158): • A cell was received while the queue was in underrun. • Receive overrun: a cell was received, causing the maximum buffer depth to be exceeded. This event causes a forced underrun condition. • A resume function has occurred: a cell was received and placed in the receive buffer causing an end to the underrun condition. • A cell was dropped in accordance with Recommendation I.363.1 “Fast SN Algorithm”. This event causes a forced underrun condition. • A cell was dropped because of a forced underrun. • A cell was dropped because of a blank allocation table or disabled receiver. • A cell was received. • A cell was dropped because a valid pointer was not found while the queue was in the underrun condition. • A valid pointer was received. • An errored pointer was received (parity check failed). • An SRTS resume occurred. • A cell was received while the SRTS queue was in underrun. • A cell was dropped because a pointer mismatch occurred causing a forced underrun condition. The AAL1gator II sets the status bits every time it detects one of the events listed previously. The microprocessor clears the status bits after it recognizes the event. Because these bits will be polled at a low rate, relative to their occurrence, it is not possible to determine the exact number of R_POINTER_REFRAMES 256 Count of pointer reframes. R_PTR_PAR_ERR 256 Count of pointer parity errors. R_MISINSERTED 256 Count of misinserted cells. T_CELL_CNT 256 Count of billable data cells transmitted to the UTOPIA interface. T_COND_CELL_CNT 256 Counts data conditioned cells transmitted to the UTOPIA interface. T_SUPPRESSED_CELL_CNT 256 Counts cells not sent because of a line resynchronization, or, if the device was in UDF-HS mode, because TX_ACTIVE is set. Also if SUPPRESS_TRANSMISSION is set, any cells not sent will increment this counter. Table 2. Statistics Counters (Continued) Counter Name Number of Counters Counter Description |
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