
XRT86SH328
PRELIMINARY
290
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
BIT [3:2] - Reserved
BIT 1 - Change of Receive Loop-Back Activation Interrupt Enable - Code 0:
This READ/WRITE bit-field is used to either enable or disable the Change of Receive Loop-Back Activation State
Interrupt, associated with Code 0. 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 0) within
the incoming DS1 data-stream, and
Whenever it ceases to detect the Receive Loop-Back Activation Pattern (associated with Code 0) within the
incoming DS1 data-stream.
`
0 = Disables the Change of Receive Loop-Back Activation State Interrupt for loop-code Code 0.
`
1 = Enables the Change of Receive Loop-Back Activation State Interrupt for loop-code Code 0
BIT 0 - Change of Receive Loop-Back Deactivation Interrupt Enable -Code 0:
This READ/WRITE bit-field is used to either enable or disable the Change of Receive Loop-Back Deactivation State
Interrupt associated with Code 0. 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 0)
within the incoming DS1 data-stream, and
Whenever it ceases to detect the Receive Loop-Back Deactivation Pattern (associated with Code 0) within
the incoming DS1 data-stream.
`
0 = Disables the Change of Receive Loop-Back Deactivation State Interrupt for Code 0.
`
1 = Enables the Change of Receive Loop-Back Deactivation State Interrupt for Code 0
page 710 of word
Bits 7 through 4 - Unused:
Bit 3 - Receive Loop-Back Activation Status - Code 1:
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 1) 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 1") 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 1") 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 1".
T
ABLE
428: T1 F
RAMER
I
NTERRUPT
R
EGISTER
- R
ECEIVE
L
OOP
-
BACK
C
ODE
I
NTERRUPT
AND
S
TATUS
R
EGISTER
-
C
ODE
1 (A
DDRESS
= 0
X
NB14,
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 1
Receive
Loop-Back
Deactivation
Status -
Code 1
Change of
Receive
Loop-Back
Activation
State Inter-
rupt Status -
Code 1
Change of
Receive
Loop-Back
Deactivation
State Inter-
rupt Status -
Code 1
R/O
R/O
R/O
R/O
R/O
R/O
RUR
RUR
0
0
0
0
0
0
0
0