PM5347 datasheet(67/302 Pages) PMC

67 / 302 page

PM5347 S/UNI-PLUS

DATA SHEET

PMC-941033

ISSUE 6

SATURN USER NETWORK INTERFACE PLUS

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

• 8 x NDF_enable eight consecutive NDF_enable indications

Notes:

1. The transitions from NORM_state to NORM_state do not represent state

changes but imply offset changes.

2. 3 x new_point takes precedence over 8 x inv_point.

3. All three offset values received in 3 x eq_new_point must be identical.

4. "Consecutive event counters" are reset to zero on a change of state.

The Pointer Interpreter Block detects loss of pointer (LOP) in the receive stream.

LOP is declared (LOP output set high) on entry to the LOP_state as a result of

eight consecutive invalid pointers or eight consecutive new data flag (NDF)

enabled indications. LOP is removed (LOP output set low) when the same valid

pointer with normal NDF is detected for three consecutive frames. Incoming STS

Path AIS (pointer bytes set to all ones) does not cause entry into the LOP state.

The Pointer Interpreter Block detects path AIS in the receive stream. PAIS is

declared (PAIS output set high) on entry to the AIS_state after three consecutive

AIS indications. PAIS is removed (PAIS set low) when the same valid pointer with

normal NDF is detected for three consecutive frames or when a valid pointer with

NDF enabled is detected.

Invalid pointer indications (inv_point), invalid NDF codes, new pointer indications

(new_point), discontinuous change of pointer alignment, and illegal pointer

changes are also detected and reported by the Pointer Interpreter block via

enabled or NDF disabled definitions. The third occurrence of equal new_point

indications (3 x eq_new_point) is reported as a discontinuous change of pointer

alignment event (DISCOPA) instead of a new pointer event and the active offset

is updated with the receive pointer value. An illegal pointer change is defined as

PM5347 数据表(PDF) 67 Page - PMC-Sierra, Inc