XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 380

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT84L38
OCTAL T1/E1/J1 FRAMER
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The CAS Multi-frame alignment pattern of four zeros can be inserted into the outgoing E1 frame by using the
following method:
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The CAS Multi-frame Yellow Alarm Y bit and the X bits can be inserted into the outgoing E1 frame by using the
following method:
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The four most significant bits of the Transmit Signaling Control Register (TSCR) of each time slot can be used
to store outgoing signaling data. The user can program these bits through microprocessor access. If the
XRT84L38 framer is configure to insert signaling bits from TSCR registers, the E1 Transmit Framer block will
fill up the time slot 16 octet with the signaling bits stored inside the TSCR registers. The insertion of signaling
bit into PCM data is done on a per-channel basis. The most significant bit (Bit 7) of TSCR register is used to
store Signaling bit A. Bit 6 is used to hold Signaling bit B. Bit 5 is used to hold Signaling bit C. Bit 4 is used to
hold Signaling bit D.
The table below shows the four most significant bits of the Transmit Signaling Control Register.
TRANSMIT SIGNALING CONTROL REGISTER (TSCR) (INDIRECT ADDRESS = 0XN2H, 0X40H - 0X5FH)
The XRT84L38 framer can be configure to insert signaling bits provided by external equipment through the
TxSig_n pins. This pin is a multiplexed I/O pin with two functions:
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11.4.3.1
11.4.3.2
N
Signaling data is inserted from the Transmit Signaling Control Registers (TSCR) of each timeslot.
Signaling data is inserted from TxSig_n pin.
Signaling data is inserted from TxOH-n pin.
Signaling data is embedded into the input PCM data coming from the Terminal Equipment.
CAS Multi-frame alignment pattern is inserted from theTransmit Signaling Control Registers (TSCR).
CAS Multi-frame alignment pattern is inserted from TxSig_n pin.
CAS Multi-frame alignment pattern is inserted from TxOH-n pin.
CAS Multi-frame alignment pattern is embedded into the input PCM data coming from the Terminal
Equipment.
The X and Y bits are inserted from the Transmit Signaling Control Register (TSCR).
The X and Y bits are inserted from TxSig_n pin.
The X and Y bits are inserted from TxOH-n pin.
The X and Y bits are embedded into the input PCM data coming from the Terminal Equipment.
The X bit is inserted from the Transmit Signaling Control Register (TSCR) and Y bit is generated by the
XRT84L38 framer according to operating condition of the E1 link.
TxTSb[0]_n - Transmit Timeslot Number Bit [0] Output pin
TxSig_n - Transmit Signaling Input pin
UMBER
B
7
6
5
4
IT
Insert Signaling Bits from TSCR Register
Insert Signaling Bits from TxSig_n Pin
Signaling Bit A
Signaling Bit B
Signaling Bit C
Signaling Bit D
B
IT
N
AME
B
IT
R/W
R/W
R/W
R/W
T
YPE
This bit is used to store Signaling Bit A.
This bit is used to store Signaling Bit B.
This bit is used to store Signaling Bit C.
This bit is used to store Signaling Bit D.
360
B
IT
D
ESCRIPTION
REV. 1.0.1