XR72L52 Datasheet, PDF (114/480 Pages) Exar Corporation – TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L52
REV. 1.0.1
xr
TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
2.3.6.13 Transmit E3 TTB-6 Register (E3, ITU-T G.832)
TXE3 TTB-6 REGISTER (ADDRESS = 0X3E)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-6[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
This Read/Write byte-field, along with the Tx TTB-0 through Tx TTB-5 and Tx TTB-7 through Tx TTB-15 regis-
ters permit a user to define a Trail Access Point Identifier sequence of bytes, that will be transmitted to the Re-
mote Terminal. The Remote Receiving Terminal will use this sequence of bytes to verify that it is connected to
the proper Transmitting Terminal. The Transmit DS3/E3 Framer block will take the contents of these 16 regis-
ters, and insert them into the TR byte of the outbound E3 frame. In the seventh of a set of 16 E3 Frames, the
Transmit DS3/E3 Framer block will read in the contents of this register, and insert it into the TR byte-field, with-
in the very next outbound E3 frame.
The contents of this register, along with Tx TTB-1 through Tx TTB-5 and Tx TTB-7 through Tx TTB-15 are
used to transmit 15 ASCII characters required for the E.164 numbering format.
2.3.6.14 Transmit E3 TTB-7 Register (E3, ITU-T G.832)
TXE3 TTB-7 REGISTER (ADDRESS = 0X3F)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-7[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
This Read/Write byte-field, along with the Tx TTB-0 through Tx TTB-6 and Tx TTB-8 through Tx TTB-15 regis-
ters allows a user to define a Trail Access Point Identifier sequence of bytes, that will be transmitted to the Re-
mote Terminal. The Remote Receiving Terminal will use this sequence of bytes to verify that it is connected to
the proper Transmitting Terminal. The Transmit DS3/E3 Framer block will take the contents of these 16 regis-
ters, and insert them into the TR byte of the outbound E3 frame. In the eighth of a set of 16 E3 Frames, the
Transmit DS3/E3 Framer block will read in the contents of this register, and insert it into the TR byte-field, with-
in the very next outbound E3 frame.
The contents of this register, along with Tx TTB-1 through Tx TTB-6 and Tx TTB-8 through Tx TTB-15 are
used to transmit 15 ASCII characters required for the E.164 numbering format.
2.3.6.15 Transmit E3 TTB-8 Register (E3, ITU-T G.832)
TXE3 TTB-8 REGISTER (ADDRESS = 0X40)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TxTTB-8[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
This Read/Write byte-field, along with the Tx TTB-0 through Tx TTB-7 and Tx TTB-9 through Tx TTB-15 regis-
ters permit a user to define a Trail Access Point Identifier sequence of bytes, that will be transmitted to the Re-
mote Terminal. The Remote Receiving Terminal will use this sequence of bytes to verify that it is connected to
the proper Transmitting Terminal. The Transmit DS3/E3 Framer block will take the contents of these 16 regis-
ters, and insert them into the TR byte of the outbound E3 frame. In the ninth of a set of 16 E3 Frames, the
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