
PRELIMINARY
XRT86SH328
283
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
N
OTES
:
1.
These READ/WRITE bit-fields are only active if Bit 0 (Receive Activation Loop-Back Code Detect Enable) has
been set to "1".
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".
Bit 0 - Receive Activation Loop-Back Code Detect Enable:
This READ/WRITE bit-field permits the user to either enable or disable the Receive DS1 Framer block for "Loop-Back
Activation" Code detection for "Code 1". If the user enables the Receive DS1 Framer block for "Loop-Back Activation"
Code detection (for Code 1), then the Receive DS1 Framer block (as it is receiving its incoming DS1 data-stream) will
also begin to check the incoming DS1 data-stream for the presence of the "Loop-Back Activation" Code (which has been
defined in Bits 7 through 1 within this particular register).
`
0 = Configures the Receive DS1 Framer block to NOT check the incoming DS1 data-stream for the presence of the
"Loop-Back Activation" code.
`
1 = Configures the Receive DS1 Framer block to check the incoming DS1 data-stream for the presence of the "Loop-
Back Activation" code.
2.
Bits [7:1] - Receive Loop-Back Deactivation Code[6:0]:
These seven (7) READ/WRITE bit-fields permits the user to specify/define one of the three possible "loop-code"
patterns that the Receive DS1 Framer block should respond to, and interpret as being the "Loop-Down" (or Loop-Back
Deactivate) code.
N
OTES
:
1.
These READ/WRITE bit-fields are only active if Bit 0 (Receive Deactivation Loop-Back Code Detect Enable) has
been set to "1".
2.
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".
Bit 0 - Receive Deactivation Loop-Back Code Detect Enable:
This READ/WRITE bit-field permits the user to either enable or disable the Receive DS1 Framer block for "Loop-Back
Deactivation" Code detection for "Code 1". If the user enables the Receive DS1 Framer block for "Loop-Back
Deactivation" Code detection (for Code 1), then the Receive DS1 Framer block (as it is receiving its incoming DS1 data-
stream) will also begin to check the incoming DS1 data-stream for the presence of the "Loop-Back Deactivation" Code
(which has been defined in Bits 7 through 1 within this particular register).
`
0 = Configures the Receive DS1 Framer block to NOT check the incoming DS1 data-stream for the presence of the
"Loop-Back Deactivation" code.
`
1 = Configures the Receive DS1 Framer block to check the incoming DS1 data-stream for the presence of the "Loop-
Back Deactivation" code.
T
ABLE
419: R
ECEIVE
T1 F
RAMER
B
LOCK
- R
ECEIVE
L
OOP
-B
ACK
D
EACTIVATION
C
ODE
R
EGISTER
- C
ODE
1
(A
DDRESS
= 0
X
N12C,
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
Receive Loop-Back Deactivation Code[6:0]
Receive
Deactivation
Loop-Back
Code Detect
Enable
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0