XRT84L38 Datasheet, PDF (101/451 Pages) Exar Corporation – OCTAL T1/E1/J1 FRAMER

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BIT NUMBER
BIT NAME
1-0
Data Link Source Select
XRT84L38
OCTAL T1/E1/J1 FRAMER
REV. 1.0.0
BIT TYPE
BIT DESCRIPTION
R/W Data Link Source Select:
These READ/WRITE bit-fields permit the user to select data
source of the Facility Data Link bits.
The user can insert Facility Data Link bits into the framer through
the LAPD controller or SLCâ96 buffer. Both LAPD controller and
SLCâ96 buffer can be programmed through microprocessor
access. The user can also insert Facility Data Link bits through
Transmit Serial Data directly via TxSer_n pins. Overhead inter-
face of the framer can also be used to input Facility Data Link
bits. Finally, the user can force these data link bits to one.
When these bits are set to 00:
The Facility Data Link bits are inserted into the framer through
either the LAPD controller or the SLCâ96 buffer.
When these bits are set to 01:
The Facility Data Link bits are inserted into the framer through
the Transmit Serial Data input.
When these bits are set to 10:
The Facility Data Link bits are inserted into the framer through
the Overhead Interface via the TxOH_n pins.
When these bits are set to 11:
The Facility Data Link bits are forced to one by the framer.
Transmit Signaling And Data Link Select Register (TSDLSR)- E1 Mode (Indirect Address = 0xn0H,
0x0AH)
BIT 7
BIT 6
BIT 5
BIT 4
BIT3
BIT 2
BIT 1
BIT 0
Transmit Sa8 Transmit Sa7 Transmit Sa6 Transmit Sa5 Transmit Sa4 Data Link Data Link Data Link
Data Link Data Link Data Link Data Link Data Link Source Select Source Select Source Select
Select
Select
Select
Select
Select
Bit 2
Bit 1
Bit 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
BIT NUMBER
BIT NAME
7
Transmit Sa8 Data Link
Select
6
Transmit Sa7 Data Link
Select
BIT TYPE
BIT DESCRIPTION
R/W Transmit Sa8 Data Link Select:
When this bit is set to 0:
Source of the Sa8 Nation bit is not from the data link interface.
When this bit is set to 1:
Source the Sa8 National bit from the data link interface.
R/W Transmit Sa7 Data Link Select:
When this bit is set to 0:
Source of the Sa7 Nation bit is not from the data link interface.
When this bit is set to 1:
Source the Sa7 National bit from the data link interface.
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