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XRT91L30 View Datasheet(PDF) - Exar Corporation

Part NameDescriptionManufacturer
XRT91L30 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER Exar
Exar Corporation Exar
XRT91L30 Datasheet PDF : 39 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
XRT91L30
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
xr
REV. 1.0.1
NAME
RLOOPS
DLOOP
ALOOP
LEVEL
LVTTL,
LVCMOS
TYPE
I
LVTTL,
I
LVCMOS
LVTTL,
I
LVCMOS
PIN
DESCRIPTION
63 Serial Remote Loopback
The serial remote loopback mode interconnects the receive
serial data input to the transmit serial data output. If serial
remote loopback is enabled, the 8-bit parallel transmit data
input is ignored while the 8-bit parallel receive data output is
maintained.
"Low" = Disabled
"High" = Serial Remote Loopback Mode Enabled
NOTE: DLOOP and RLOOPS can be enabled simultaneously
to achieve a SPLIT loopback diagnostic feature in
normal operation.
62 Digital Local Loopback
The digital local loopback mode interconnects the 8-bit parallel
transmit data input and TxCLK to the 8-bit parallel receive data
output and RxCLK respectively while maintaining the transmit
serial data output. If digital local loopback is enabled, the
receive serial data input is ignored.
"Low" = Disabled
"High" = Digital Local Loopback Mode Enabled
NOTE: DLOOP and RLOOPS can be enabled simultaneously
to achieve a SPLIT loopback diagnostic feature in
normal operation.
64 Analog Local Loopback
This loopback feature serializes the 8-bit parallel transmit data
input and presents the data to the transmit serial output and in
addition it also internally routes the serialized data back to the
Clock and Data Recovery block for serial to parallel conversion.
The received serial data input is ignored.
"Low" = Disabled
"High" = Analog Local Loopback Mode Enabled
6
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