PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
20H and 27H reflect TU3 status and configuration, all other registers relating
to TUG2s and the tributaries within TUG2s are disabled; data written is
ignored, data read is invalid. Out of TU3 mode, register 20H reflects status
and configuration of TUG2 #1, TU #1 and register 27H 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.
Reserved:
The Reserved bit must be set low for correct operation of the TUPP+622.
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. This bit does not
apply to set new pointer events (i.e. NDF’s).
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
126
PMC [ PMC-SIERRA, INC ]
