S/UNI®-JET Data Sheet
Released
SFRME
When the Single Framing Bit Error (SFRME) bit is set to logic one, then the J2-FRMR will
indicate (to the PMON) a single framing error for every J2 multi-frame which contains one or
more framing errors. When the SFRME bit is set to logic zero, the J2-FRMR will identify
every framing error to the PMON.
LOSTHR[1:0]
The LOS Threshold bits select the number of consecutive zeroes required before the J2-
FRMR will declare LOS, and the number of bit periods without an occurrence of excess
zeroes that must pass before the J2-FRMR will de-assert LOS. The thresholds are described
in Table 18:
Table 18 J2 FRMR LOS Threshold Configurations
LOSTHR[1]
LOSTHR[0]
Threshold
15
31
63
0
0
1
1
0
1
0
1
255
Thus, if LOSTHR[1:0] = 11 binary, LOS will be declared after the 255th consecutive binary
zero, and de-asserted when 255 bit periods have passed without an occurrence of a string of
eight or more consecutive zeroes.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
161
PMC [ PMC-SIERRA, INC ]
