XRT79L71 Datasheet, PDF (227/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TXE3 NR BYTE REGISTER - G.832 (DIRECT ADDRESS = 0X1137)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
TxNR_Byte[7:0]
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
BIT 2
R/W
0
XRT79L71
REV. P1.0.3
BIT 1
R/W
0
BIT 0
R/W
0
BIT NUMBER
NAME
7-0
TxNR_Byte[7:0]
TYPE
R/W
DESCRIPTION
Transmit NR Byte:
This READ/WRITE bit-field permits the user to specify the con-
tents of the NR byte, within the "outbound" E3 data stream. The
Frame Generator block will load the contents of this register in
the NR byte-field, within each outbound E3 frame.
NOTE: This register is ignored if the NR byte is configured to be
the "LAPD/PMDL" channel.
TXE3 TTB-0 REGISTER - G.832 (DIRECT ADDRESS = 0X1138)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
TxTTB_Byte_0
R/W
R/W
R/W
R/W
R/W
1
0
0
0
0
BIT 2
R/W
0
BIT 1
R/W
0
BIT 0
R/W
0
BIT NUMBER
NAME
7-0
TxTTB_Byte_0[7:0]
TYPE
R/W
DESCRIPTION
Transmit TTB (Trail-Trace Buffer) Byte 0:
These READ/WRITE bits permit the user to specify the contents
of "Trail-Trace Buffer Byte 0" within the outbound E3 data stream.
By default, the MSB (Most Significant Bit) of this register bit will
be set to "1" in order to permit the remote terminal to be able to
identify this particular byte, as being the first byte of the "Trail-
Trace Buffer" Message.
TXE3 TTB-1 REGISTER - G.832 (DIRECT ADDRESS = 0X1139)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
TxTTB_Byte_1
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
BIT 2
R/W
0
BIT 1
R/W
0
BIT 0
R/W
0
BIT NUMBER
NAME
7-0
TxTTB_Byte_1[7:0]
TYPE
R/W
DESCRIPTION
Transmit TTB (Trail-Trace Buffer) Byte 1:
These READ/WRITE bits permit the user to specify the contents
of "Trail-Trace Buffer Byte 1" within the outbound E3 data stream.
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