PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
frames (selectable by the PSL5 bit in the configuration register) before being considered
accepted.
The RHPP also monitors the path signal label byte (C2) to detect path payload label unstable
(PLU-P) defect. A PSL unstable counter is increment every time the received PSL differs from the
previously received PSL (an erroneous PSL will cause the counter to be increment twice, once
when the erroneous PSL is received and once when the error free PSL is received). The PSL
unstable counter is reset when the same PSL value is received for three or five consecutive
frames (selectable by the PSL5 bit in the configuration register). PLU-P is declared when the
PSL unstable counter reaches five. PLU-P is removed when the PSL unstable counter is reset.
The RHPP also monitors the path signal label byte (C2) to detect path payload label mismatch
(PLM-P) defect. PLM-P is declared when the accepted PSL does not match the expected PSL
according to Table 1. PLM-P is removed when the accepted PSL match the expected PSL
according to Table 1. The accepted PSL is the same PSL value received for three or five
consecutive frames (selectable by the PSL5 bit in the configuration register). The expected PSL
is a programmable PSL value.
The RHPP also monitors the path signal label byte (C2) to detect path unequipped (UNEQ-P)
defect. UNEQ-P is declared when the accepted PSL is 00H and the expected PSL is not 00H.
UNEQ-P is removed when the accepted PSL is not 00H or when the accepted PSL is 00H and
the expected PSL is 00H. The accepted PSL is the same PSL value received for three or five
consecutive frames (selectable by the PSL5 bit in the configuration register). The expected PSL
is a register programmable PSL value.
The RHPP also monitors the path signal label byte (C2) to detect path payload defect indication
(PDI-P) defect. PDI-P is declared when the accepted PSL is a PDI defect that matches the
expected PDI defect. The PDI-P defect is removed when the accepted PSL is not a PDI defect or
when the accepted PSL is a PDI defect that does not match the expected PDI defect. The
accepted PSL is the same PSL value received for three or five consecutive frames (selectable by
the PSL5 bit in the configuration register). Table 2 gives the expected PDI defect based on the
programmable PDI and PDI range register values.
Table 1: PLM-P, UNEQ-P and PDI-P defects declaration
Expected PSL
Accepted PSL
Unequipped
PLM-P
Match
UNEQ-P
Inactive
PDI-P
Inactive
Inactive
Inactive
00
Unequipped
00
01
Equipped non specific
Equipped specific
Mismatch
Mismatch
Inactive
02-E0
FD-FF
Inactive
E1-FC
PDI
=expPDI
!=expPDI
Match
Inactive
Inactive
Active
Active
Inactive
Inactive
Mismatch
Mismatch
01
Equipped non specific
00
Unequipped
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
60
PMC [ PMC-SIERRA, INC ]
