
PRELIMINARY
XRT86SH328
189
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
BIT [7:5] - Reserved
BIT 4 - PRBS Lock Detect
This READ-ONLY bit-field indicates whether or not the PRBS Receiver (within the Receive DS3 Framer block) has
acquired PRBS Lock with the payload data of the incoming DS3 data-stream, as described below.
`
0 - Indicates that the PRBS Receiver does not have PRBS Lock with the incoming data-stream.
`
1 - Indicates that the PRBS Receiver does have PRBS Lock with the incoming data-stream.
N
OTE
:
This bit-field is only valid if the PRBS Receiver has been enabled.
BIT 3 - PRBS Receiver Enable
This READ/WRITE bit-field is used to either enable or disable the PRBS Receiver within the Receive DS3 Framer block.
Once the user enables the PRBS Receiver, then it will proceed to attempt to acquire and maintain pattern sync (or PRBS
Lock) within the payloadbits, within the incoming DS3 data-stream.
`
0 - Disables the PRBS Receiver
`
1 - Enables the PRBS Receiver.
BIT 2 - PRBS Generator Enable
This READ/WRITE bit-field is used to either enable or disable the PRBS Generator within the Transmit DS3 Framer
block. Once the user enables the PRBS Generator block, then it will proceed to insert a PRBS Pattern into the payload
bits, within the outbound DS3 data-stream.
`
0 - Disables the PRBS Generator
`
1 - Enables the PRBS Generator.
BIT 1 - Receive DS3 Framer By-Pass
BIT 0 - Transmit DS3 Framer By-Pass
BIT7 - Unused
BIT6 - PRBS Type
This READ/WRITE bit-field is used to select between two possible PRBS Patterns, that the PRBS Generator and
Receiver will be handling.
`
0 - The PRBS Generator and Receiver will be handling a 2^15-1 PRBS Pattern.
`
1 - The PRBS Generator and Receiver will be handling a 2^23-1 PRBS Pattern.
N
OTE
:
This READ/WRITE bit-field is only active if the PRBS Receiver and Generator have been enabled.
BIT[5:4] - BER Control[1:0]
T
ABLE
247: DS3 F
RAMER
AND
M13 MUX B
LOCK
- DS3 T
EST
R
EGISTER
(A
DDRESS
= 0
X
0E0C)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Reserved
PRBS Lock
Detect
PRBS
Receiver
Enable
PRBS
Generator
Enable
Reserved
R/O
R/O
R/O
R/O
R/W
R/W
R/O
R/O
0
0
0
0
0
0
0
0
T
ABLE
248: DS3 F
RAMER
AND
M13 MUX B
LOCK
- DS3 T
EST
R
EGISTER
# 2 (A
DDRESS
= 0
X
0E0E)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
PRBS Type
BER Control[1:0]
Unused
Unframed
PRBS
R/O
R/W
R/W
R/W
R/O
R/O
R/O
R/W
0
0
0
0
0
0
0
0