S/UNI®-JET Data Sheet
Released
Register 331H: DS3 FRMR Additional Configuration Register
(ACE=1 in Register 333H)
Bit
Type
Function
Unused
Unused
AISONES
BPVO
EXZSO
EXZDET
SALGO
DALGO
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
DALGO
The DALGO bit determines the criteria used to decode a valid B3ZS signature. When
DALGO is set to logic one, a valid B3ZS signature is declared and three zeros substituted
whenever a zero followed by a bipolar violation of the opposite polarity to the last observed
BPV is seen. When the DALGO bit is set to logic zero, a valid B3ZS signature is declared
and the three zeros are substituted whenever a zero followed by a bipolar violation is
observed.
SALGO
The SALGO bit determines the criteria used to establish a valid B3ZS signature used to map
BPVs to LCV indications. Any BPV that is not part of a valid B3ZS signature is indicated as
an LCV. When the SALGO bit is set to logic one, a valid B3ZS signature is declared
whenever a zero followed by a bipolar violation is observed. When SALGO is set to logic
zero, a valid B3ZS signature is declared whenever a zero followed by a bipolar violation of
the opposite polarity to the last observed BPV is seen.
EXZDET
The EXZDET bit determines the type of zero occurrences to be included in the LCV
indication. When EXZDET is set to logic one, the occurrence of an excessive zero generates
a single pulse indication that is used to indicate an LCV. When EXZDET is set to logic zero,
every occurrence of three consecutive zeros generates a pulse indication that is used to
indicate an LCV. For example, if a sequence of 15 consecutive zeros were received, with
EXZDET=1 only a single LCV would be indicated for this string of excessive zeros; with
EXZDET=0, five LCVs would be indicated for this string (i.e. one LCV for every three
consecutive zeros). Refer to Table 14.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
130
PMC [ PMC-SIERRA, INC ]
