VSC6134
Datasheet
Any one of the following conditions resets the debouncing and pauses SM BDI monitoring:
●
●
●
OOF when OTUk_OOFDBC_CTRL = 1
LOF
LOS
SM Backward Error Indication (BEI)
The SM BEI monitor accumulates the BEI value in a 24-bit counter. Every second the BEI error count
transfers to a cache register OTUk_SM_BEICNT[23:0] for microprocessor read access. Depending on
the microprocessor configuration bit SAT_ROLLOVERN, the accumulator either clears
(SAT_ROLLOVERN = 1) or retains its value (SAT_ROLLOVERN = 0) after the count transfers.
OTUk_SM_BDIL or OTUk_SM_BIAEL, when set, pauses BEI accumulation. Any one of the
following conditions also pauses BEI accumulation:
●
●
●
OOF when OTUk_OOFCNT_CTRL = 1
LOF
LOS
BEI values of 1 through 8 set the status bit OTUk_SM_BEIS. OTUk_SM_BEIS and its respective mask
bit OTUk_SM_BEIM create a maskable interrupt.
The SM BEI monitor detects the BIAE signal by debouncing BEI over three consecutive frames. If SM
BEI is equal to 1011 for three consecutive frames, the SM BEI monitor sets the live bit
OTUk_SM_BIAEL. Three consecutive frames of SM BEI not equal to 1011 clear the live bit. Each
transition of OTUk_SM_BIAEL sets the status bit OTUk_SM_BIAES. OTUk_SM_BIAES and its
respective mask bit OTUk_SM_BIAEM create a maskable interrupt.
Any one of the following conditions resets the debouncing and pauses SM BIAE monitoring:
●
●
●
OOF when OTUk_OOFDBC_CTRL = 1
LOF
LOS
SM Incoming Alignment Error (IAE)
The SM IAE monitor debounces SM IAE by detecting identical SM IAE bits over five consecutive
frames. The live bit OTUk_SM_IAEL is the last valid value of the debounced IAE. A status bit
OTUk_SM_IAES is set on each OTUk_SM_IAEL change of state. OTUk_SM_IAES and its respective
mask bit OTUk_SM_IAEM create a maskable interrupt.
Any one of the following conditions resets the debouncing and pauses SM IAE monitoring:
●
●
●
OOF when OTUk_OOFDBC_CTRL = 1
LOF
LOS
SM Reserved Bits
There is no on-chip processing done for the SM reserved bits.
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VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
