
PXB 4330
Register Descriptions
Data Sheet
6-153
09.99
BUFER2
Unexpected Buffer Error number 2. Should never occur in normal
operation. Immediate reset of the chip is recommended.
BUFER3
Unexpected Buffer Error number 3. Should never occur in normal
operation. Immediate reset of the chip recommended.
CDVOV
The maximum downstream CDV value for shaped connections
given in CDVU register has been exceeded.
This interrupt is a notification only; that is, no cells are discarded
due to this event.
MUXOV
Indicates that a Scheduler lost a serving time slot. (Can indicate a
static backpressure on one port).
The ’MUXOV’ interrupt is generated when the number of lost
serving time slots exceeds the number specified in bit field
MaxBurstS(3:0) (see register
ECRIU/ECRID
).
No further action is required upon this interrupt.
BUFER4/
CNTUF
Indicates that a scheduler specific counter for ’unused cell cycles’
has falsely been set to its maximum value by device logic
(maximum value is determined by parameter MaxBurstS(3:0)
programmed in register
ECRIU/ECRID
).
This can occur when either the scheduler rate or the UTOPIA port
number are changed during operation without disabling the
scheduler.
As a consequence a burst of up to MaxBurstS(3:0) cells can be sent
out that is not justified by previously saved cell cycles.
No cells are discarded due to this event and no further action is
required upon this interrupt.
RMCER
ABR RM cell received with corrupted CRC-10.
BIP8ER
BIP-8 error detected when reading a cell from the downstream
external SDRAM. BIP-8 protects the cell header of each cell. The
cell is discarded. One single sporadic event can be ignored.
Hardware should be taken out of service when the error rate
exceeds 10
-10
.