PMC-Sierra, Inc.
PM5356
S/UNI-622-MAX
DATASHEET
S/UNI-622-MAX
PMC-1980589
ISSUE 5
SATURN USER NETWORK INTERFACE (622-MAX)
Register 0x59: CSPI Status and Configuration
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
ROOLV
Unused
Unused
Unused
ROOLE
X
X
X
X
X
X
X
0
R
R/W
ROOLE:
The ROOLE bit enables the reference out of lock indication interrupt. When ROOLE is set
high, an interrupt is generated upon assertion and negation events of the ROOLV register.
When ROOLE is set low, changes in the ROOL status do not generate an interrupt.
ROOLV:
The transmit reference out of lock status indicates the clock synthesis phase lock 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.
When the AVD power supply of the S/UNI-622-MAX is subjected to a change greater than the
±5% tolerance specified for the 3.3V analog supply pins, the Clock Synthesis Unit may lose
lock to the reference. When this occurs, the ROOLV will remain high until the CSU is reset
using the CSURESETLPF and CSURSET registers.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
147
PMC [ PMC-SIERRA, INC ]
