XRT75L03D Datasheet, PDF (86/134 Pages) Exar Corporation – THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75L03D
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REV. 1.0.0 THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
BIT NUMBER
4
NAME
RLB_n
TYPE
R/W
DEFAULT
VALUE
DESCRIPTION
0
Loop-Back Select - RLB Bit - Channel_n:
This READ/WRITE bit-field along with the corresponding
LLB_n bit-field is used to configure a given channel (within
the XRT75L03D) into various loop-back modes.
The relationship between the settings for this input pin, the
corresponding LLB_n bit-field and the resulting Loop-back
Mode is presented below.
LLB_n
0
0
1
1
RLB_n
0
1
0
1
Loop-back M ode
Normal (No Loop-back) Mode
Remote Loop-back Mode
Analog Local Loop-back Mode
Digital Local Loop-back Mode
3
LLB_n
R/W
0
Loop-Back Select - LLB Bit-field - Channel_n:
Please see the description (above) for RLB_n.
2
E3_n
R/W
0
E3 Mode Select - Channel_n:
This READ/WRITE bit-field, along with Bit 1 (STS-1/
DS3_n) within this particular register, is used to configure a
given channel (of the XRT75L03D) into either the DS3, E3
or STS-1 Modes, as depicted below.
0 - Configures Channel_n to operate in either the DS3 or
STS-1 Modes, depending upon the state of Bit 1 (STS-1/
DS3_n) within this same register.
1- Configures Channel_n to operate in the E3 Mode.
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