PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
5.4 TUPP-PLUS Compatibility and TUPP+622 Feature Enhancements
The TUPP+622 (PM5363) supports software configuration of the payload frame
alignment in the outgoing data stream. The high order path active offset may be
set to any alignment on a per-STM-1 (STS-3) basis. For example, by setting the
outgoing stream active offset contained in the STP Outgoing Pointer MSB and
LSB registers in STM-1 (STS-3) Tributary Processor #1 (STP #1) to zero, the J1
byte(s) of the outgoing AU3/AU4 in STM-1 (STS-3) #1 will be aligned to the first
payload byte(s) immediately following the H3 bytes. Similarly, the J1 byte(s) can
be aligned to the payload byte(s) immediately after the J0/Z0 bytes of the section
overhead by setting the outgoing stream active offset to 522. In the TUPP-PLUS
(PM5362), arbitrary placement of payload frame boundaries, is supported by
placing the device in floating mode and supplying the device with an outgoing
payload active signal (OPL) and a payload frame alignment signal (J1 portion of
OC1J1). Since the TUPP+622 supports this feature in software, floating mode is
no longer required. Consequently, the OC1J1 and OPL signals are deleted. The
transport frame alignment of the outgoing data stream corresponds to a delayed
version of the incoming data stream. To improve signal naming consistency in the
TUPP+622, the TUPP-PLUS equivalent LC1J1V1 and LPL signals are renamed
to OC1J1V1 and OPL, respectively. An input generated system clock frame
position (GSCLK_FP) signal is added to the TUPP+622 to enable externally
alignment of the GSCLK generation and related internal operation of the device
when the 77.76 MHz STM-4 interface mode is selected for the incoming or
outgoing interface. This feature allows a deterministic transport frame delay
through the TUPP+622 to be set. This is essential when multiple TUPP+622
devices have to be aligned in processing data streams with aggregate bandwidth
greater than an STM-4.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
12
PMC [ PMC-SIERRA, INC ]
