
PRELIMINARY
XRT86SH328
191
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
Pattern, within the incoming DS3 data-stream.
`
0 - Indicates that the Receive DS3 Framer block is NOT currently declaring the Idle Pattern condition within the
incoming DS3 data-stream.
`
1 - Indicates that the Receive DS3 Framer block is currently declaring the Idle Pattern condition within the incoming
DS3 data-stream.
BIT 4 - DS3 OOF Defect Declared:
This READ-ONLY bit-field indicates whether or not the Receive DS3 Framer block is currently declaring the OOF (Out-
of-Frame) defect condition.
`
0 - Indicates that the Receive DS3 Framer block is NOT currently declaring the OOF defect condition.
`
1 - Indicates that the Receive DS3 Framer block is currently declaring the OOF defect condition.
BIT 3 - Reserved:
BIT 2 - Framing with Valid P-Bits:
This READ/WRITE bit-field is used to configure the Receive DS3 Framer block to use either of the following two different
sets of DS3 Frame Acquisition/Maintenance criteria.
Normal Framing Acquisition/Maintenance Criteria (without P-bit Checking)
In this mode, the Receive DS3 Framer block will declare the In-Frame state, once it has successfully completed both
the F-Bit Search and the M-Bit Search states.
Framing Acquisition/Maintenance with P-bit Checking:
In this mode, the Receive DS3 Framer block will (in addition to passing through the F-Bit Search and M-Bit Search
states) also verify valid P-bits prior to declaring the In-Frame state.
`
0 - Configures the Receive DS3 Framer block to use the Normal Framing Acquisition/Maintenance Criteria (without
P-bit Checking)
`
1 - Configures the Receive DS3 Framer block to use the Framing Acquisition/Maintenance with P-Bit Checking
criteria.
BIT 1 - F-Bit Search State Criteria Select:
This READ/WRITE bit-field is used to configure the Receive DS3 Framer block to use either one of the following DS3
Out-of-Frame (OOF) Defect Declaration criteria.
`
0 - Configures the Receive DS3 Framer block to declare the OOF defect condition, whenever it determines that 6 out
of the most recent 15 F-bits (within the incoming DS3 data-stream) are erred.
`
1 - Configures the Receive DS3 Framer block to declare the OOF defect condition whenever it determines that 3 out
of the most recent 15 F-bits (within the incoming DS3 data-stream) are erred.
BIT 0 - M-Bit Search State Criteria:
This READ/WRITE bit-field is used to configure the Receive DS3 Framer block to use either one of the following DS3
Out-of-Frame (OOF) Defect Declaration criteria.
`
0 - Configures the Receive DS3 Framer block to NOT declare the OOF defect condition whenever it detects M-bit
errors.
`
1 - Configures the Receive DS3 Framer block to declare the OOF defect condition whenever it detects M-bit errors
within 3 out of 4 of the most recently received DS3 frames.
BIT7 - 5 - Reserved:
T
ABLE
250: DS3 F
RAMER
B
LOCK
- R
ECEIVE
DS3 S
TATUS
R
EGISTER
(A
DDRESS
= 0
X
0E11)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Reserved
DS3
FERF/RDI
Defect
Declared
Received
AIC State
Received FEBE[2:0] Values
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
0
0
0
0
0
0
0
0