PM5366-PI datasheet(228/267 Pages) PMC

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PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

216

The LAC1 signal is updated on the rising edge of LREFCLK. It is output during

when the TEMAP-84 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 56

- Telecom ADD Bus Timing - Locked STS-1 SPEs / AU3 VCs

LREFCLK

••••

LAC1

LAC1J1V1

LAPL

Implicit location

of STS-1 SPE

J1 bytes

LADATA[7:0]

A2C1 C1 C1

H1 H1 H2 H2 H2 H3

No stuff events possible

V1 byte VT #1, STS-1 #1

V5 byte VT #1, STS-1 #2

J1 J1 J1 V1 V1 V1 V1 V1 V1 V1

V1 byte VT #1, STS-1 #2

V1 byte VT #1, STS-1 #3

V1 bytes VT #2

J2 byte VT #1, STS-1 #1

LAOE

Figure 57 shows the function of the TEMAP-84 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 LADATA[7:0].

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