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S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
71
RXDINV:
The RXDINV bit selects the active polarity of the RXD+/- signals. The default
configuration selects RXD+ to be active high and RXD- to be active low.
When RXDINV is set to logic one, RXD+ to be active low and RXD- to be
active high.
TFPI_EN:
The TFPI_EN bit controls the framing alignment in the transmit direction.
When TFPI_EN is set to logic one the transmit SONET/SDH framing is
aligned to a master (available to all four channels) framing pulse counter,
which can also be aligned to the TFPI device input. When TFPI_EN is set to
logic zero the transmit framing alignment is arbitrary. External framing
(TFPI_EN set to logic one) shall only be used when the channel is in self-
timed mode. TFPI_EN should always be set to logic zero when the channel is
loop-timed (LOOPT set to logic one) or in line loopback (LLE set to logic one).