
XRT86SH328
PRELIMINARY
190
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
These two READ/WRITE bit-fields are used to select the rate at which the PRBS Generator (within the
Transmit DS3 Framer block) will generate and transmit Bit-Errors, within the outbound DS3/PRBS Data-
Stream.
N
OTE
:
These bit-fields are only active if the PRBS Generator has been enabled.
BIT[3:1] - Unused
BIT 0 - Unframed PRBS
This READ/WRITE bit-field is used to configure the PRBS Generator and the Transmit DS3 Framer block to
transmit either a Frame or an Unframed PRBS Pattern, within the outbound DS3 data-stream.
`
0 - Configures the PRBS Generator/Transmit DS3 Framer to transmit a Framed PRBS Pattern, whenever the PRBS
Generator has been enabled.
`
1 - Configures the PRBS Generator/Transmit DS3 Framer to transmit an Unframed PRBS Pattern, whenever the
PRBS Generator has been enabled.
N
OTE
:
This bit-field is only active if the PRBS Generator has been enabled.
BIT7 - DS3 AIS Defect Declared:
This READ-ONLY bit-field indicates whether or not the Receive DS3 Framer block is currently declaring the AIS defect
condition, within the incoming DS3 data-stream.
`
0 - Indicates that the Receive DS3 Framer block is NOT currently declaring the AIS defect condition within the
incoming DS3 data-stream.
`
1 - Indicates that the Receive DS3 Framer block is currently declaring the AIS defect condition within the incoming
DS3 data-stream.
BIT6 - DS3 LOS Defect Declared:
This READ-ONLY bit-field indicates whether or not the Receive DS3 Framer block is currently declaring the LOS defect
condition, within the incoming DS3 data-stream.
`
0 - Indicates that the Receive DS3 Framer block is NOT currently declaring the LOS defect condition within the
incoming DS3 data-stream.
`
1 - Indicates that the Receive DS3 Framer block is currently declaring the LOS defect condition within the incoming
DS3 data-stream.
BIT 5 - DS3 Idle Pattern Declared:
This READ-ONLY bit-field indicates whether or not the Receive DS3 Framer block is currently declaring the DS3 Idle
The Relationship between the BER Control[1:0] bit-fields and the Resulting Bit Error-Rate that the
PRBS Generator will. Insert within the outbound DS3/PRBS data-stream
BER C
ONTROL
[1:0]
R
ESULTING
B
IT
E
RROR
R
ATE
INSERTED
WITHIN
THE
OUTBOUND
DS3/PRBS
D
ATA
-S
TREAM
00, 11
No Bit Errors Selected (Normal Operation)
01
1 Bit per 1000 Bits are Erred
10
1 Bit per 1,000,000 Bits are Erred
T
ABLE
249: DS3 F
RAMER
B
LOCK
- R
ECEIVE
DS3 C
ONFIGURATION
& S
TATUS
R
EGISTER
(A
DDRESS
= 0
X
0E10)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
DS3 AIS
Defect
Declared
DS3 LOS
Defect
Declared
DS3 Idle
Pattern
Declared
DS3 OOF
Defect
Declared
Reserved
Framing with
Valid P-Bits
F Sync Algo
M Sync Algo
R/O
R/O
R/O
R/O
R/O
R/W
R/W
R/W
0
0
0
1
0
1
0
0