PM4354 Datasheet, PDF (96/463 Pages) PMC-Sierra, Inc – Four Channel Combined E1/T1/J1 Transceiver/Framer

RELEASED
PM4354 COMET-QUAD
DATASHEET
PMC-1990315
ISSUE 6
FOUR CHANNEL COMBINED E1/T1/J1
TRANSCEIVER / FRAMER
and clock inputs to RX-ELST are internally routed directly to the RX-ELST output. If
RXELSTBYP is logic 1, the CMODE bit of the BRIF Configuration register must be logic 0 and
the FPMODE bit of the BRIF Frame Pulse Configuration register must be logic 0.
In Receive Clock Slave: H-MVIP mode, RXELSTBYP must be programmed to logic 0.
RSYNC_MEM:
The RSYNC_MEM bit controls the quadrant’s RSYNC output under a loss of signal condition
(as determined by the RSYNC_ALOSB register bit). When RSYNC_MEM is a logic 1, the
quadrant’s RSYNC output is held high during a loss of signal condition. When RSYNC_MEM
is a logic 0, the quadrant’s RSYNC output is derived from XCLK during a loss of signal
condition.
RSYNCSEL:
The RSYNCSEL bit selects the frequency of the receive reference presented on the
quadrant’s RSYNC output. If RSYNCSEL is a logic 1, the quadrant’s RSYNC will be an 8 kHz
clock. If RSYNCSEL is a logic 0, the quadrant’s RSYNC will be an 1.544 MHz (T1) or
2.048 MHz (E1) clock.
WORDERR:
In E1 mode, the WORDERR bit determines how frame alignment signal (FAS) errors are
reported. When WORDERR is logic 1, one or more errors in the seven bit FAS word results
in a single framing error count. When WORDERR is logic 0, each error in a FAS word results
in a single framing error count.
CNTNFAS:
In E1 mode, when the CNTNFAS bit is a logic 1, a zero in bit 2 of timeslot 0 of non-frame
alignment signal (NFAS) frames results in an increment of the framing error count. If
WORDERR is also a logic 1, the word is defined as the eight bits consisting of the seven-bit
FAS pattern and bit 2 of timeslot 0 of the next NFAS frame. When the CNTNFAS bit is a
logic 0, only errors in the FAS affect the framing error count.
CCOFA
The CCOFA bit determines whether the PMON counts Change-Of-Frame Alignment (COFA)
events or out of frame (OOF) events. When CCOFA is set to logic 1, COFA events are
counted by PMON. When CCOFA is set to logic 0, OOF events are counted by PMON. The
CCOFA bit is only valid in T1 mode.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS’ INTERNAL USE
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