PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
The timing of the TUPP+622 output buses when it is in STM-1 (STS-3) output
interface mode (OHSMODEB set high) is illustrated in Figure 24 where n is {1, 2,
3, 4}. This diagram shows the relationships of the output signals in AU4 mode
associated with each of the four output buses. The operation of the various
signals is analogous to the STS-1 mode, except that there is only a single J1.
This timing applies regardless of whether individual tributary payload processors
are configured for TUG3 or TU3 mode. Data on OD[7:0] (OD[15:8], OD[23:16],
OD[31:24]) is updated on the rising edge of SCLK. The OC1J1V1[1]
(OC1J1V1[2], OC1J1V1[3], OC1J1V1[4]) signal pulses high with OPL[1] (OPL[2],
OPL[3], OPL[4]) signal set low to mark the position of the single C1 byte in every
frame of the AU4 transport envelope on OD[7:0] (OD[15:8], OD[23:16],
OD[31:24]). In AU4 mode, the position of the single J1 byte and the VC4 is
determined by the value written to the STP Outgoing Pointer MSB and LSB
registers. This register settable alignment is reflected in the outgoing stream
control signals OC1J1V1[1] (OC1J1V1[2], OC1J1V1[3], OC1J1V1[4]) and OPL[1]
(OPL[2], OPL[3], OPL[4]). OC1J1V1[1] (OC1J1V1[2], OC1J1V1[3], OC1J1V1[4])
pulses high with OPL[1] (OPL[2], OPL[3], OPL[4]) signal set high to mark the J1
byte and the third byte after J1 of the first tributary in the AU4 stream. OPL[1]
(OPL[2], OPL[3], OPL[4]) identifies the payload bytes on OD[7:0] (OD[15:8],
OD[23:16], OD[31:24]). The OTMF[1] (OTMF[2], OTMF[3], OTMF[4]) input marks
the frame containing V1 bytes in OD[7:0] (OD[15:8], OD[23:16], OD[31:24]). 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
OTPL[1] (OTPL[2], OTPL[3], OTPL[4]) signal being set high. The OTV5[1]
(OTV5[2], OTV5[3], OTV5[4]) signal pulses high to mark the V5 bytes of each
outgoing tributary. The TPOH[1] (TPOH[2], TPOH[3], TPOH[4]) signal pulses high
to mark the tributary path overhead bytes (V5, J2, Z6 and Z7) of each outgoing
tributary. In this simple example, the VC4 is aligned to the STM-1 transport
envelope such that the J1 byte directly follows the C1 byte. Other alignments are
possible The four output buses can be independently configured to handle STS-
1/AU3 or AU4 and the SPE/VC alignments of the output buses may be different.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
397
PMC [ PMC-SIERRA, INC ]
