PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
LOP_state (LOP)
The transition between states will be consecutive events (indications), e.g., three consecutive AIS
indications to go from the NORM_state to the AIS_state. The kind and number of consecutive
indications activating a transition is chosen such that the behavior is stable and insensitive to low
BER. The only transition on a single event is the one from the AIS_state to the NORM_state after
receiving a NDF enabled with a valid pointer value. It should be noted that, since the algorithm
only contains transitions based on consecutive indications, this implies that, for example, non-
consecutively received invalid indications do not activate the transitions to the LOP_state.
Figure 9: Pointer interpretation state diagram
NDF_ENABLE
INC_IND/DEC_IND
3 x EQ_NEW_POINT
NORM
8 x INV_POINT
3 x AIS_IND
8 x NDF_ENABLE
NDF_ENABLE
3 x EQ_NEW_POINT
3 x EQ_NEW_POINT
3 x AIS_IND
LOP
AIS
8 x INV_POINT
The following events (indications) are defined:
NORM_POINT:
NDF_ENABLE:
AIS_IND:
disabled NDF + ss + offset value equal to active offset.
enabled NDF + ss + offset value in range of 0 to 782.
H1 = FFh + H2 = FFh.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
55
PMC [ PMC-SIERRA, INC ]
