S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Released
ROOLV:
The recovered reference out of lock status indicates the clock recovery phase locked loop is
unable to lock to the reference clock on REFCLK. ROOLV is a logic one if the divided
down synthesized clock frequency is not within approximately 488ppm of the REFCLK
frequency. At startup, ROOLV may remain high for several hundred millisecond while the
PLL obtains lock.
LOTV:
The loss of transition status indicates the receive power is lost or at least 97 consecutive
ones or zeros have been received. LOTV is a logic zero if the SD input is high or less than
97 consecutive ones or zeros have been received. LOTV is a logic one if the SD input is
low or more than 96 consecutive ones or zeros have been received.
LOCK:
The CRU reference locking status indicates if the CRU is locking to the reference clock or
the locking to the receive data. LOCK is a logic zero if the CRU is locking or locked to the
reference clock. LOCK is a logic one if the CRU is locking or locked to the receive data.
LOCK is invalid if the CRU is not used.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
218
PMC [ PMC-SIERRA, INC ]
