PM6341 E1XC
DATA SHEET
PMC-910419
ISSUE 8
E1 FRAMER/TRANSCEIVER
GENCRC FEBEDIS Source of International/National bits
0
X
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.
1
1
0
1
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
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 signalling multiframe as follows. When
XDIS is set to a logic 0, the contents of the Extra Bits Control Register are
inserted into TS16, frame 0; when XDIS is a logic 1, the contents of the
register are ignored and the values for those bits positions in the output
stream are taken directly from the BTPCM stream. i.e., When XDIS and FDIS
are logic 0, and SIGEN is logic 1, the X1,X3,X4 bit values from the Extra Bits
Control Register are used for the Extra bits in TS16 of frame 0 of the
signalling multiframe.
When the E1XC is reset, the contents of this register are set to logic 0, except
SIGEN and DLEN which are set to logic 1.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
169
PMC [ PMC-SIERRA, INC ]
