PM6344 datasheet(173/256 Pages) PMC

173 / 256 page

STANDARD PRODUCT

PMC-Sierra, Inc.

PM6344 EQUAD

PMC-951013

ISSUE 5

QUADRUPLE E1 FRAMER

160

is a logic 1, the contents of the TRAN International/National Bit Control

are taken directly from the BTPCM[x] stream. When INDIS and FDIS are

logic 0, the bit values used for the International and National bits are

dependent upon the values of the GENCRC and FEBEDIS configuration bits,

as shown in the following table:

GENCRC

FEBEDIS

Source of International/National bits

Bit position Si[1] in the

International/National Control Register is

used for the International bit in the frame

alignment signal (FAS) frames and the Si[0]

bit in the non-frame alignment signal (NFAS)

frames if INDIS is logic 0. TPCM replaces

Si[1:0] if INDIS is logic 1. Bit positions

Sn[4:0] in the register are used for the

National bits in NFAS frames.

The calculated CRC bits are used for the

International bit in the FAS frames and the

generated CRC multiframe alignment signal

and the FEBE bits are used for the

International bit in the NFAS frames. Bit

positions Sn[4:0] in the TRAN

International/National Control register are

used for the National bits in NFAS frames.

The calculated CRC bits are used for the

International bit in the FAS frames and the

generated CRC multiframe alignment signal

is used for the International bit in the NFAS

frames, with the Si[1:0] bits in the

International/National Control Register used

for the spare bits. Bit positions Sn[4:0] in

the register are used for the National bits in

NFAS frames.

XDIS:

If FDIS is logic 0 and SIGEN is logic 1, the XDIS bit controls the insertion of

the Extra bits in TS16 of frame 0 of the signaling multiframe as follows. When

XDIS is set to a logic 0, the contents of the TRAN Extra Bits Control Register

are inserted into TS16, frame 0; when XDIS is a logic 1, the contents of the

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