PMC-Sierra, Inc.
PM5356
S/UNI-622-MAX
DATASHEET
S/UNI-622-MAX
PMC-1980589
ISSUE 5
SATURN USER NETWORK INTERFACE (622-MAX)
9.2
Parallel Line Side Interface Signals - CRU and CSU Bypass
Pin Name
Type
Pin
No.
Function
LIFSEL
Input
C23
The line interface select (LIFSEL) selects between serial and
parallel line interface modes of operation.
When tied high, the parallel mode is selected by-passing the
clock and data recovery, clock synthesis and the serializer/de-
serializer functions.
When tied low, serial mode is selected, enabling clock and data
recovery, clock synthesis and the serializer/de-serializer
functions. During this operation, the parallel interface may be
used for 1+1 APS operation. See the Operation section for
more discussion of 1+1 APS support.
PICLK
Input
AC19
The parallel input clock (PICLK) provides timing for S/UNI-622-
MAX receive function operation when the device is configured
for the parallel interface mode of operation.
When the RSOC3 bit is set high, PICLK is a 19.44 MHz
nominally 50% duty cycle clock. When the RSOC3 bit is set low,
PICLK is a 77.76 MHz nominally 50% duty cycle clock.
When parallel operation is not used, PICLK may be used for 1+1
APS operation. See the Operation section for more discussion
of 1+1 APS.
OOF
Output
AA18
The out of frame (OOF) signal is high while the S/UNI-622-MAX
is out of frame. OOF is set low while the S/UNI-622-MAX is in-
frame. An out of frame declaration occurs when four
consecutive errored framing patterns (A1 and A2 bytes) have
been received.
OOF is intended to enable an upstream framing pattern detector
to search for the framing pattern. This alarm indication is also
available via register access. OOF is an asynchronous output
with a minimum period of one PICLK clock.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
18
PMC [ PMC-SIERRA, INC ]
