PM5361-RI PMC-Sierra, Inc., PM5361-RI Datasheet - Page 77

• Manufacturer Part Number: PM5361-RI
• Description: SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR
• Manufacturer: PMC-Sierra, Inc.

DATA SHEET
PMC-920526
AU4 Mode
This mode is enabled when the ICONCAT and OCONCAT bits are set high. In
AU4 mode, individual TPPs must be configured in either TUG3 mode or TU3
mode. The IC1J1 input is expected to mark the J1 byte of the VC4. This J1
marker is stretched to provide a "J1" marker to each TPP . TPP #2 and TPP#3
are slaved to the tributary multiframe indication provided by TPP #1 as it is the
only one that receives a valid H4 byte.
TUG3 Mode
This mode is enabled when the TUG3 bit is set high in a TPP . In addition, the
ICONCAT and OCONCAT bits must be set high for the TUPP . The TUG3
processed by the TPP is assumed to carry seven TUG2s, each of which can be
independently configured to carry TU11s, TU12s, or TU2s. (The equivalent of a
VT3 is allowed but there is no SDH nomenclature to describe this.) When the
TUPP is in AU4 mode, each TPP can be independently configured in TUG3 or
TU3 mode.
TU3 Mode
This mode is enabled when the TU3 bit is set high in a TPP . In addition the
ICONCAT and OCONCAT bits must be set high for the TUPP . The TUG3
processed by the TPP is assumed to carry a TU3. When the TUPP is in AU4
mode, each TPP can be independently configured in TUG3 or TU3 mode.
For figures in the operation and functional timing sections (Figure 4 to Figure 15),
transport overhead and path overhead bytes are shown for notational
convenience only. In the incoming direction, except for the H4 byte, DIN[7:0]
does not need to contain valid transport and STS/AU path overhead byte values.
The H4 byte must be valid only if H4 framing is enabled (ITMFEN=0). Otherwise,
it too may be invalid. However, the incoming parity must match the data supplied
at all times. In the outgoing direction, TUPP places random data on DOUT[7:0]
for transport overhead bytes. It generates all zero bytes for the STS/AU path
overhead except for the H4 byte which contains leading ones and an
incrementing two bit pattern. The fixed stuff bytes in the tributary mapping to the
synchronous payload envelope (virtual container) are also generated as all zero
bytes. The outgoing parity reflects the data on DOUT[7:0] at all times.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
ISSUE 8
TRIBUTARY UNIT PAYLOAD PROCESSOR
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PM5361 TUPP