PM5342 Datasheet, PDF (115/558 Pages) PMC-Sierra, Inc – SONET/SDH Payload Extractor/Aligner

DATA SHEET
PMC-970133
ISSUE 4
PM5342 SPECTRA-155
SONET/SDH PAYLOAD EXTRACTOR/ALIGNER
Pin Name
Pin PIN
Type No.
SS[19]/
Input A11
SDMTDAT[1]
SS[20]/
SDMTDAT[2]
C10
SS[21]/
SDMTDAT[3]
B10
SS[22]
Input B9
SS[23]
C9
SS[24]
A8
SS[25]
D9
SS[26]
B8
SS[27]/
Output C8
SDMTOCLK[1]
SS[28]/
SDMTOCLK[2]
A7
SS[29]/
SDMTOCLK[3]
B7
Function
The serial data mode transmit data
(SDMTDAT[3:1]) signals contain the data to be
mapped into the SONET/SDH SPE.
SDMTDAT[1] corresponds to the STS-1
(STM-0/AU3) #1 stream of an STS-3
(STM-1/AU3) while SDMTDAT[3] corresponds
to the STS-1 (STM-0/AU3) #3 stream of an
STS-3 (STM-1/AU3). ). Payload bits are
transmitted in the order in which they are
provided by SDMTDAT. SONET/SDH serial
word alignment is not maintained.
Transport overhead and path overhead bytes
are not included. In addition, the SPE fixed stuff
columns are optionally included using the
GAPFS bit in the D3MA Control register.
SDMTDAT[3:1] are sampled using the rising
edge of the associated SDMTICLK[3:1] clock.
Reserved. Should be strapped low in this
mode of operation.
The serial data mode transmit output clock
(SDMTOCLK[3:1]) signals provide timing for up
to three upstream external data sources (eg.
HDLC controllers). SDMTOCLK[1] corresponds
to the STS-1 (STM-0/AU3) #1 stream of an
STS-3 (STM-1/AU3) while SDMTOCLK[3]
corresponds to the STS-1 (STM-0/AU3) #3
stream of an STS-3 (STM-1/AU3).
When GAPFS bit in the corresponding D3MA
Control register is set low, SDMTOCLK is
nominally a 49.536 MHz clock generated by
gapping a 51.84 MHz clock. When GAPFS bit
is set high, SDMTOCLK is nominally a 48.384
MHz clock.
For proper operation, SDMTOCLK[3:1] signals
must be tied to the associated SDMTICLK[3:1].
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 93