PM8611-BIAP PMC [PMC-Sierra, Inc], PM8611-BIAP Datasheet - Page 23

• Manufacturer Part Number: PM8611-BIAP
• Manufacturer: PMC [PMC-Sierra, Inc]

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010883, Issue 2
Pin Name
OPL
OV5
Type
Tristate
Output
Tristate
Output
Pin
No.
D9
B8
Function
Outgoing Bus Payload (OPL). The outgoing payload signal, OPL,
indicates valid tributary data within the SBI bus. In TelecomBus
mode, this signal indicates valid path payload.
In SBI336 mode:
This active high signal is asserted during all octets making up a
tributary which includes all octets shaded grey in the framing
format tables. This signal goes high during the V3 or H3 octet
within a tributary to accommodate negative timing adjustments
between the tributary rate and the fixed SBI bus structure. This
signal goes low during the octet after the V3 or H3 octet within a
tributary to accommodate positive timing adjustments between the
tributary rate and the fixed SBI bus structure. For fractional rate
links this signal indicates that the current octet is carrying valid data
when high.
In locked TVT mode, this signal must be driven in the same
manner as for floating TVTs.
In TelecomBus mode:
This signal distinguishes between transport overhead bytes and
synchronous payload bytes. OPL is set high to mark each payload
byte on ODATA[7:0] and is set low to mark each transport
overhead byte.
OPL is updated on the rising edge of SREFCLK.
Outgoing Bus Payload Indicator (OV5). The active high signal,
OV5, locates the position of the floating payload for each tributary
within the outgoing SBI336 or TelecomBuses.
In SBI336 mode:
This active high signal locates the position of the floating payloads
for each tributary within the SBI336 structure. Timing differences
between the port timing and the bus timing are indicated by
adjustments of this payload indicator relative to the fixed bus
structure. All movements indicated by this signal must be
accompanied by appropriate adjustments in the OPL signal.
In locked TVT mode or fractional rate link mode this signal may be
driven but must be ignored by the receiving device.
In TelecomBus mode:
This signal identifies tributary payload frame boundaries on the
outgoing data bus. OV5 is set high to mark the V5 bytes on the
bus.
OV5 is updated on the rising edge of SREFCLK.
SBSLITE™ Telecom Standard Product Data Sheet
Preliminary
22