PM5362TUPP-PLUS
DATA SHEET
PMC-951010
ISSUE 6
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR / PERFORMANCE MONITOR
is ignored and read data is invalid. When not in TU3 mode, register 60H
reflects status and configuration of TUG2 #1, TU #1 and register 67H reflect
LOP interrupt status of TU #1 in all seven TUG #2s. When changing the
value of the TU3 bit, tributary processing must be disabled (TUGEN must
have a value of logic zero).
NOFILT:
The NOFILT bit controls the processing of incoming tributary pointers. When
a logic 0 is written to this location, illegal variations from normal tributary
pointer value (i.e. changes which do not correspond to pointer justification
events, and are not accompanied by a new data flag) are ignored unless a
consistent new value is received three times consecutively. When a logic 1 is
written to this location, variations take effect immediately and are passed
through the payload buffer unfiltered.
ICODE:
The ICODE bit controls the value inserted into tributary bytes when idle
insertion is enabled. When a logic 0 is written to this location, the idle code is
chosen to be all zeros. Setting ICODE to 1 sets the idle code to all ones. Idle
insertion only affects the tributary payload bytes which are overwritten with
the selected idle pattern. The outgoing pointer remains a function of the
incoming pointer and the relative multiframe alignment of the incoming and
outgoing streams. ICODE has no effect on pointer processing. In TU3 mode,
ICODE must be set to 0 for the C2 byte to indicate unequipped.
MONIS:
The MONIS bit controls the source of pointer justification interrupts. When
MONIS is set high, the incoming stream is monitored for tributary pointer
justification events. When MONIS is set low, the outgoing stream is
monitored for pointer justification events. Interrupts can be optionally
generated upon a pointer justification event in the monitored stream.
SOS:
The SOS bit controls the spacing between consecutive pointer justification
events on the incoming stream. When SOS is set high, the definition of
inc_ind and dec_ind indications includes the requirement that active offset
changes have occurred at least three frames ago. When SOS is set low,
pointer justification indications in the incoming stream are followed without
regard to the proximity of previous active offset change.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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PMC [ PMC-SIERRA, INC ]
