PM6344 datasheet(196/256 Pages) PMC

196 / 256 page

STANDARD PRODUCT

PMC-Sierra, Inc.

PM6344 EQUAD

PMC-951013

ISSUE 5

QUADRUPLE E1 FRAMER

183

Figure 14

- Receive composite multiframe output (BRXSMFP=1 and

BRXCMFP=1)

12 345 6 7 8

AB C D

12 345 6 7 8

Timeslot 31

Timeslot 0

BRCLK

BRFPO[x]

BRPCM[x]

BRSIG[x]

BRFPI

Undefined

12 345 678

AB C D

2 345 678

Timeslot 31

Timeslot 0

Undefined

If ROHM=0, BRXSMFP=1 and BRXCMFP=1, the BRFPO[x] signal becomes high

on the falling BRCLK edge marking the beginning of bit 1 of frame 1 of every 16

frame signaling multiframe and returns low on the falling BRCLK edge marking

the end of bit 1 of frame 1 of every 16 frame CRC multiframe.

Figure 15

- Receive overhead output (ROHM=1)

12 345 6 7 8

AB C D

1 234 56 781 234 56 78

AB C D

12 3 456 781 2 3 456 78

ABC D

Timeslot 31

Timeslot 0

Timeslot 1

Timeslot 16

Timeslot 17

BRCLK

BRFPO[x]

BRPCM[x]

BRSIG[x]

BRFPI

Undefined

If the ROHM bit is logic 1, the BRFPO[x] signal marks the overhead by becoming

high during timeslots 0 and 16, as in Figure 15.

PM6344 Datasheet(PDF) 196 Page - PMC-Sierra, Inc

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