
XRT86SH328
PRELIMINARY
292
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
State" Interrupt associated with Loop-Code "Code 1". If the user enables the "Change of Receive Loop-Back Activation
State" Interrupt, then the Receive DS1 Framer block will generate the "Change of Receive Loop-Back Activation State"
Interrupt in response to the following events.
Whenever it detects and validates the "Receive Loop-Back Activation" Pattern (associated with "Code 1") within the
incoming DS1 data-stream, and
Whenever it ceases to detect the "Receive Loop-Back Activation" Pattern (associated with "Code 1") within the
incoming DS1 data-stream.
`
0 = Disables the "Change of Receive Loop-Back Activation State" Interrupt for loop-code "Code 1".
`
1 = Enables the "Change of Receive Loop-Back Activation State" Interrupt for loop-code "Code 1".
Bit 0 - Change of Receive Loop-Back Deactivation Interrupt Enable - Code 1:
This READ/WRITE bit-field permits the user to either enable or disable the "Change of Receive Loop-Back Deactivation
State" Interrupt. If the user enables the "Change of Receive Loop-Back Deactivation State" Interrupt, then the Receive
DS1 Framer block will generate the "Change of Receive Loop-Back Deactivation State" Interrupt in response to the
following events.
Whenever it detects and validates the "Receive Loop-Back Deactivation" Pattern (associated with "Code 1") within
the incoming DS1 data-stream, and
Whenever it ceases to detect the "Receive Loop-Back Deactivation" Pattern (associated with "Code 1") within the
incoming DS1 data-stream.
`
0 = Disables the "Change of Receive Loop-Back Deactivation State" Interrupt for "Code 1".
`
1 = Enables the "Change of Receive Loop-Back Deactivation State" Interrupt for "Code 1".
Bits 7 through 4 - Unused:
Bit 3 - Receive Loop-Back Activation Status - Code 2:
This READ-ONLY bit-field indicates whether or not the Receive DS1 Framer block is currently detecting (and flagging)
the Loop-Up (or Loop-Back Activate) code (associated with Code 2) within the incoming DS1 data-stream, as depicted
below.
`
0 = Indicates that the Receive DS1 Framer block is NOT currently detecting (nor flagging) the "Loop-Back Activate"
Code (associated with "Code 2") within the incoming DS1 data-stream.
`
1 = Indicates that the Receive DS1 Framer block is currently detecting (and flagging) the "Loop-Back Activate" Code
(associated with "Code 2") within the incoming DS1 data-stream.
N
OTE
:
The Receive DS1/E1 Framer block can be configured to detect three different loop activate/deactivate codes in
parallel. These three (3) codes will be referred to as "Code 0", "Code 1" and "Code 2" within this document.
This particular register applies to "Code 2".
Bit 2 - Receive Loop-Back Deactivation Status - Code 2:
This READ-ONLY bit-field indicates whether or not the Receive DS1 Framer block is currently detecting (and flagging)
the Loop-Down (or Loop-Back Deactivate) code (associated with Code 2) within the incoming DS1 data-stream.
`
0 = Indicates that the Receive DS1 Framer block is NOT currently detecting (nor flagging) the "Loop-Back Deactivate"
T
ABLE
430: T1 F
RAMER
I
NTERRUPT
R
EGISTER
- R
ECEIVE
L
OOP
-
BACK
C
ODE
I
NTERRUPT
AND
S
TATUS
R
EGISTER
-
C
ODE
2 (A
DDRESS
= 0
X
NB1A,
WHERE
N
RANGES
IN
VALUE
FROM
0
X
01
TO
0
X
38)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Unused
Receive
Loop-Back
Activation
Status -
Code 2
Receive
Loop-Back
Deactivation
Status -
Code 2
Change of
Receive
Loop-Back
Activation
State Inter-
rupt Status -
Code 2
Change of
Receive
Loop-Back
Deactivation
State Inter-
rupt Status -
Code 2
R/O
R/O
R/O
R/O
R/O
R/O
RUR
RUR
0
0
0
0
0
0
0
0