PM5361-RI PMC-Sierra, Inc., PM5361-RI Datasheet - Page 87

• 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]
OSPE=0
The VC4 is defined to be aligned to the AU4 transport envelope such that the J1
byte occupies the first available payload byte after the C1 byte, and no pointer
justification events are possible. The OTMF input marks the frame containing V1
bytes. It is sampled only at the J1 plus one byte position of the first TUG3
stream. 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 tributary.
Figure 14
OTSPE
Figure 15 shows the function of the various output signals in floating AU4 mode.
Data on DOUT[7:0] is updated on the rising edge of SCLK. The bytes forming
the VC4 virtual container are identified by the setting the OSPE signal high. The
OC1J1 signal pulses high, while OSPE is set low, to mark the single C1 byte in
every frame of the AU4 transport envelope. The OC1J1 signal is set high again
with OSPE high to mark the J1 byte of the VC4. The OTMF input is selectable to
mark the V1 byte of the first tributary in the VC4, or the H4 byte in the last
(fourth) frame of a tributary multiframe. In this diagram, OTMF is shown to be
marking the first V1 byte. The bytes forming the various tributary synchronous
OC1J1
OTMF
SCLK
OTV5
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
First NPI byte TUG3 #1
Implicit location
of VC4 J1 byte
National
bytes
V1 byte TU #1, TUG2 #1, TUG3 #1
A2 C1 X X
- Output Bus Timing - Locked AU4 VC Case
J1
ISSUE 8
NP
NP NP
V1
Last H4 byte
in tributary
multiframe
••••
H4
TRIBUTARY UNIT PAYLOAD PROCESSOR
NPI Columns
V5 byte TU #1,
TUG2 #1, TUG3 #1
V5
79
PM5361 TUPP