PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
is generated upon assertion of the FIFO_UNDF_I register bit. When FIFO_UNDF_EN is set
low, a change in the FIFO_UNDF_I status does not generate an interrupt.
FIFO_OVRF_EN:
The FIFO Overflow Enable bit connects the FIFO_OVRF_I status bit to the ECBI_INTB pin of
the RCS_2488. When FIFO_OVRF_EN is set to logic one, an interrupt on the ECBI_INTB is
generated upon assertion of the FIFO_OVRF_I register bit. When FIFO_OVRF_EN is set
low, a change in the FIFO_OVRF_I status does not generate an interrupt.
PRBS_ERR_EN:
The PRBS Error Enable bit connects the PRBS_ERR_I status bit to the ECBI_INTB pin of the
RCS_2488. When PRBS_ERR_EN is set to logic one, an interrupt on the ECBI_INTB is
generated upon assertion of the PRBS_ERR_I register bit. When PRBS_ERR_EN is set low,
a change in the PRBS_ERR_I status does not generate an interrupt.
PRBS_SYNC_EN:
The PRBS Synchronized Enable bit connects the PRBS_SYNC_I status bit to the ECBI_INTB
pin of the RCS_2488. When PRBS_SYNC_EN is set to logic one, an interrupt on the
ECBI_INTB is generated upon assertion of the PRBS_SYNC_I register bit. When
PRBS_SYNC_EN is set low, a change in the PRBS_SYNC_I status does not generate an
interrupt.
ROOL_I:
The recovered reference out of lock status indicates the clock recovery phase locked loop is
unable to lock to the reference clock on REFCLK. ROOL_I is a logic one if the divided down
synthesized clock frequency is not within 488 ppm of the REFCLK frequency. At startup,
ROOL_I may remain at logic 1 for several hundred millisecond while the PLL obtains lock.
This bit is only cleared by over-writing with a ‘1’.
DOOL_I:
The recovered data out of lock status indicates the clock recovery phase locked loop is
unable to recover and lock to the input data stream. DOOL_I is a logic one if the divided
down recovered clock frequency is not within 488 ppm of the REFCLK frequency of if no
transitions have occurred on the RXD input for more than LOS_COUNT[4:0] bits. This bit is
only cleared by over-writing with a ‘1’.
LOS_I:
The loss of signal status indicates the receive signal is lost or at least LOS_COUNT[4:0]
consecutive ones or zeros have been received. LOS_I is a logic zero if the SDI input is high
or less than LOS_COUNT[4:0] consecutive ones or zeros have been received. LOS_I is a
logic one if the SDI input is low or LOS_COUNT[4:0] consecutive ones or zeros have been
received. This bit is only cleared by over-writing with a ‘1’.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
120
PMC [ PMC-SIERRA, INC ]
