XRT73L02M Datasheet, PDF (12/46 Pages) Exar Corporation – TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT73L02M
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
xr
REV. 1.0.0
CONTROL AND ALARM INTERFACE
28
LOSMUT/
INT
4
LLB_0
22
LLB_1
5
RLB_0
21
RLB_1
I/O ^{Hardware Mode: MUTE-upon-LOS Enable Input}
Host Mode: Interrupt Ouput:
In Hardware Mode, setting pin “High” configures all the channels to Mute the
recovered data on the RPOS_n and RNEG_n whenever one of the channels
declares an LOS condition. RPOS_n and RNEG_n outputs are pulled “Low”.
Muting of the output data can be configured/controlled on a per channel basis in
Host Mode.
NOTE: If the XRT73L02M is configured in HOST mode, this pin functions as
INT pin (please refer to the pin description for the Microprocessor Interface).
I
Local Loop-back - Channel 0:
Local Loop-back - Channel 1:
This input pin along with RLB_n configures different Loop-Back modes.
A "High" on this pin with RLB_n set to "Low" configures Channel_n to operate in
the Analog Local Loop-back Mode.
A "High" on this pin with RLB_n set to "High" configures Channel_n to operate
in the Digital Local Loop-back Mode.
NOTE: This input pin is ignored and should be connected to GND if operating in
the HOST Mode.
I
Remote Loop-back - Channel 0:
Remote Loop-back - Channel 1:
This input pin along with LLB_n configures different Loop-Back modes.
A "High" on this pin with LLB_n set to “Low" configures Channel_n to operate in
the Remote Loop-back Mode.
A "High" on this pin with LLB_n set to "High" configures Channel_n to operate
in the Digital Local Loop-back Mode.
RLB_n
0
0
1
1
LLB_n
0
1
0
1
Loopback Mode
Normal Operation
Analog Local
Remote
Digital
NOTE: This input pin is ignored and should be connected to GND when operat-
ing in the HOST Mode.
10