PM5316 datasheet(41/491 Pages) PMC

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SONET/SDH Payload Extractor/Aligner (SPECTRA-4x155)

Production

Proprietary and Confidential to PMC-Sierra, Inc. and for its customers’ internal use

Document ID: PMC-1990822, Issue 4

Pin Name

Type

No.

Function

TLRDI1/

TLRDI2/

TLRDI3/

TLRDI4/

/TRCPFP1

/TRCPFP2

/TRCPFP3

/TRCPFP4

Input

The active high transmit RDI (TLRDI1-4) signal controls the insertion

of a remote defect indication in the transmit outgoing stream when

the ring control port is disabled. When TLRDI1-4 is set high, bits 6, 7,

and 8 of the K2 byte are set to the pattern 110. When TLRDI1-4 is

set low, line RDI may also be inserted using the LRDI bit in the TLOP

Control register of the corresponding channel. Line RDI may also be

inserted upon detection of LOS, LOF, or line AIS in the receive

stream, using the bits in the Transmit Line RDI Control register of the

corresponding channel. The TLRDI1-4 input takes precedence over

the TTOH1-4 and TTOHEN1-4 inputs. TLRDI signals are internally

retimed. TLRDI1-4 must be asserted for a minimum period of one

SONET/SHD frame (125 us) to be detected by the SPECTRA-4x155.

Line RDI must be held for a minimum of three SONET/SDH frames

to be compliant to the SONET/SDH standards.

The Transmit ring control port frame position (TRCPFP1-4) signal

identifies bit positions in the transmit ring control port data

(TRCPDAT1-4) when the ring control port is enabled. TRCPFP1-4 is

high during the send line AIS and the send line RDI bit positions in

the TRCPDAT1-4 stream. TRCPFP1-4 is set high for 19 bits

locations prior to those 2 bit locations. These 19 bit locations are

reserved. TRCPFP1–4 is set low during the reserved L-REI clock

cycles. TRCPFP1-4 can be connected directly to the RRCPFP1-4

output of a mate SPECTRA-4x155 in ring-based Add-Drop

multiplexer applications.

The RCPEN bit in the Ring Control register of the corresponding

channel controls the enabling and disabling of the ring control port.

The TRCPFP1-4 signal is sampled on the rising edge of TRCPCLK1-

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