STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
The LAC1 signal is updated on the rising edge of LREFCLK. It is output during
when the TEMAP is outputing valid tributary data onto the ADD bus. It is
asserted high for all bytes making up a tributary and is asserted low during
overhead bytes.
Figure 48: Output Bus Timing - Locked STS-1 SPEs / AU3 VCs
LREFCLK
LAC1
••••
LAOE
LAC1J1V1
LAPL
LADATA[7:0]
A2 C1 C1 C1 J1 J1 J1 V1 V1 V1 V1 V1 V1 V1
H1 H1 H1 H2 H2 H2 H3 H3 H3
J2 V5
Implicit location
No stuff events possible
J2 byte VT #1, STS-1 #1
V5 byte VT #1, STS-1 #2
of STS-1 SPE
J1 bytes
V1 bytes VT #2
V1 byte VT #1, STS-1 #1
V1 byte VT #1, STS-1 #2
V1 byte VT #1, STS-1 #3
Figure 49 shows the function of the TEMAP telecom ADD bus when operating in
AU4 mode. In AU4 mode, the position of the single J1 byte and the VC4 is
implicitly defined by the LAC1 byte position. 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. No pointer justification events take place on the
ADD bus. LAC1J1V1 pulses high to mark the first C1 byte, the J1 byte and the
third byte after J1 of the first tributary in the AU4 stream. LAPL identifies the
payload bytes on LADATAD[7:0].
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use
195
PMC [ PMC-SIERRA, INC ]
