PM7367 datasheet(253/323 Pages) PMC

253 / 323 page

PM7367 FREEDM-32P32

DATA SHEET

PMC-1991499

ISSUE 2

FRAME ENGINE AND DATA LINK MANAGER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE

239

CEN:

The channelise enable bit (CEN) configures the corresponding transmit link

for channelised operation. TCLK[n] is held quiescent during the T1 framing

bit or the E1 framing byte. Thus, on the first rising edge of TCLK[n] after the

extended quiescent period, a downstream device can sample the m.s.b. of

time-slot 1. When CEN is set low, the corresponding link is unchannelised

and the E1 register bit is ignored. TCLK[n] is gapped during non-data bytes.

All data bits are treated as a contiguous stream with arbitrary byte alignment.

E1:

The E1 frame structure select bit (E1) configures the corresponding link for

channelised E1 operation when CEN is set high. TCLK[n] is held quiescent

during the FAS and NFAS framing bytes. The most significant bit of time-slot

1 is placed on TD[n] on the last falling edge of TCLK[n] ahead of the

extended quiescent period. Link data is present at time-slots 1 to 31. When

E1 is set low and CEN is set high, the corresponding link is configured for

channelised T1 operation. TCLK[n] is held quiescent during the framing bit.

The m.s.b. of time-slot 1 is placed on TD[n] on the last falling edge of

TCLK[n] ahead of the extended low period. Link data is present at time-slots

1 to 24. E1 is ignored when CEN is set low.

PM7367 датащи(PDF) 253 Page - PMC-Sierra, Inc