PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
- When the received pointer returns to an in-range value, the
S/UNI-2488 will interpret it correctly.
Note 11:
LOP will exit at the third frame of a three frame sequence consisting of
one frame with NDF enabled followed by two frames with NDF disabled,
if all three pointers have the same legal value.
The transitions indicated in the state diagram are defined as follows:
INC_IND/DEC_IND: offset adjustment (increment or decrement indication)
3 x EQ_NEW_POINT: three consecutive equal NEW_POINT indications
NDF_ENABLE:
3 x AIS_IND:
single NDF_ENABLE indication
three consecutive AIS indications
8 x INV_POINT:
8 x NDF_ENABLE
eight consecutive INV_POINT indications
eight consecutive NDF_ENABLE indications
Note 1:
Note 2:
Note 3:
Note 4:
the transitions from NORM_state to NORM_state do not represent state
changes but imply offset changes.
3 x EQ_NEW_POINT takes precedence over other events and may
optionally reset the INV_POINT count.
all three offset values received in 3 x EQ_NEW_POINT must be
identical.
"consecutive event counters" are reset to zero on a change of state
(except the INV_POINT counter).
Note 5
"consecutive event counters" are reset to zero on a change of state
except for consecutive NDF count.
LOP is declared on entry to the LOP_state after eight consecutive invalid pointers or eight
consecutive NDF enabled indications
PAIS is declared on entry to the AIS_state after three consecutive AIS indications
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
57
PMC [ PMC-SIERRA, INC ]
