PM5361-RI PMC-Sierra, Inc., PM5361-RI Datasheet - Page 85

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

DATA SHEET
PMC-920526
(OTMFH4=0)
(OJ1EN=0)
DOUT[7:0]
OTSPE
This same diagram would apply for AU3 mode as it is equivalent to STS-1 mode,
except for nomenclature.
Figure 12
Figure 13 shows the function of the various output signals in floating STS-1
mode. Data on DOUT[7:0] is updated on the rising edge of SCLK. The bytes
forming the three STS-1 synchronous payload envelopes are identified by the
setting the OSPE signal high. In this diagram, a negative stuff event is shown
occurring on STS-1 #2 and a positive stuff event on STS-1 #3. The OC1J1
signal pulses high, while OSPE is set low, to mark the C1 byte of the first STS-1
in every frame of the STS-3 transport envelope. The OC1J1 signal is set high to
mark every J1 byte of each of the three STS-1 SPEs. The OTMF input is
selectable to mark the V1 byte of the first tributary in each STS-1 SPE, or the H4
byte in the last (fourth) frame of a tributary multiframe. In this diagram, OTMF is
shown to be marking the last H4 byte of the tributary multiframe in STS-1 #1.
The bytes forming the various tributary synchronous payload envelopes are
identified by the OTSPE signal being set high. The OTV5 signal pulses high to
mark the V5 bytes of each outgoing tributaries. The three STS-1 SPEs each
have different alignments to the STS-3 transport envelope and the alignment is
OC1J1
OSPE
SCLK
OTMF
OTV5
V1 byte VT #1, STS-1 #1
V1 byte VT #1, STS-1 #2
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
Implicit location
of STS-1 SPE
J1 bytes
V1 byte VT #1, STS-1 #3
A2 C1 C1 C1
- Output Bus Timing - Locked STS-1 SPEs / AU3 VCs Case
J1 J1 J1 V1 V1 V1 V1 V1 V1 V1
ISSUE 8
V1 bytes VT #2
••••
No stuff events
possible in locked case
H1
H1 H1 H2 H2 H2 H3
V5 byte VT #1, STS-1 #2
TRIBUTARY UNIT PAYLOAD PROCESSOR
H3
H3
77
PM5361 TUPP
V5