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 23 where n is {1, 2,
3, 4}. This diagram shows the relationships of the output signals in STS-1 mode
associated with each of the four output buses. 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 C1 byte of the first
STS-1 stream in every frame of the STS-3 transport envelope on OD[7:0]
(OD[15:8], OD[23:16], OD[31:24]). In STS-1 mode, the position of the J1 bytes
and the STS-1 SPEs is determined by the value written to the STP Outgoing
Pointer MSB and LSB registers. All three STS-1 SPEs are aligned in the STS-3
transport envelope. 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 all three J1 bytes and the third byte after J1 of the first tributary in each
STS-1 stream. OPL[1] (OPL[2], OPL[3], OPL[4]) identifies the SPE 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 first V1 byte position of the first
STS-1 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 marks the tributary path overhead bytes (V5, J2, Z6 and Z7) of
each outgoing tributary. In this simple example, all STS-1 SPEs are aligned to the
STS-3 transport envelope such that the J1 bytes directly follow the C1 bytes.
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. This diagram also applies to the AU3 mode as it is
equivalent to STS-1 mode, except for nomenclature.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
395
PMC [ PMC-SIERRA, INC ]
