
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
50
13.4 Receive/Transmit Section/Line/Path Status and Alarms Signals
Pin Name
Type
Pin
No.
Function
RRCPCLK
Output
P30
The
receive ring control port clock
(RCPCLK signal
provides timing for the receive ring control port.
RRCPCLK is a nominal 25.92 MHz clock, 33% high duty cycle
and can be connected directly to the TRCPCLK input of a
mate SPECTRA-9953 in ring-based Add/Drop multiplexer
applications.
When the Spectra-9953 is processing four STS-48/STM-16
data streams, the STM-16 slice #1 must be active (software
slice reset is not set to 1) for the ring control port to operate
normally.
RRCPFP and RRCPDAT are generated on the falling edge of
RRCPCLK.
RRCPFP
Output
P31
The
receive ring control port frame pulse
(RRCPFP) signal
identifies bit positions in the receive ring control port data
(RRCPDAT).
RRCPFP is high to identify the OOF defect on the RRCPDAT
data stream.
RRCPFP can be connected directly to the TRCPFP input of a
mate SPECTRA-9953 in ring-based Add/Drop multiplexer
applications.
RRCPFP is generated on the falling edge of RRCPCLK.
RRCPDAT1
RRCPDAT2
RRCPDAT3
RRCPDAT4
Output
M31
L33
M32
L34
The
receive ring control port data
(RRCPDAT1-4) signal
contains the receive ring control port data stream.
The receive ring control port data consists of the filtered K1,
K2 bytes, the change of APS indication, the APS byte failure
indication, the line AIS indication, the line RDI indication, the
line REI, the path RDI indication, the path ERDI indication and
the path REI.
RRCPDAT1-4 can be connected directly to the TRCPDAT1-4
input of a mate SPECTRA-9953 in ring-based Add/Drop
multiplexer applications.
If sysclk and the receive line clock (rxclk) are not frequency
locked, then on RRCPDAT, a frame’s worth of REI errors may
be added to or subtracted from the correct REI count. The
difference is proportional to the clock frequency difference, so
for SONET compliant clocks, the REI counts from 1 frame out
of 50000 could be added/dropped.
RRCPDAT1-4 is updated on the falling edge of RRCPCLK