
PRELIMINARY
XRT86SH328
213
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
If the user sets the FEBE Register Enable bit-field to '1, then the Transmit DS3 Framer block will wsrite the contents of
these bit-fields into the FEBE bit-fields within each outbound DS3 frame.
If the user sets the FEBE Register Enable bit-field to 0, then these register bits will be ignored.
BIT 4 - FEBE Register Enable
This READ/WRITE bit-field is used to configure the Transmit DS3 Framer block to transmit user-specified FEBE values
(to the remote terminal equipment) per register setting via the TxFEBEDat[2:0] bit-fields. This option is used to exercise
software control over the outbound FEBE values, within the outbound DS3 data-stream.
`
0 - Configures the Transmit DS3 Framer block to set the FEBE bit-fields (within each outbound DS3 frame) to the
appropriate values based upon receive conditions, as determined by the Receive DS3 Framer block.
`
1 - Configures the Transmit DS3 Framer block to set the write the contents of the TxFEBEDat[2:0] bit-fields into the
FEBE bit-positions within each outbound DS3 frame.
BIT 3 - Transmit P-Bit Error
This READ/WRITE bit-field is used to configure the Transmit DS3 Framer block to transmit DS3 frames with erred P-
bits as indicated below.
`
0 - Configures the Transmit DS3 Framer block to generate and transmit DS3 frames (with correct P-bit values) to the
remote terminal equipment.
`
1 - Configures the Transmit DS3 Framer block to generate and transmit DS3 frames (with erred P-bit values) to the
remote terminal equipment.
BIT[2:0] - TxM_Bit_Mask[2:0]
These READ/WRITE bit-fields are used to configure the Transmit DS3 Framer block to transmit DS3 frames with erred
M-bits.
These three (3) bit-fields corresponding to each of the three M-bits, within each outbound DS3 frame. The Transmit
DS3 Framer block will perform an XOR operation with the contents of these bit-fields and the values of the three M-bits.
The results of this calculation will be written back into the M-bit position within each outbound DS3 frame.
N
OTE
:
The user should set these bit-fields to 0, 0, 0 for normal (e.g., un-erred) operation.
BIT[7:4] - Unused
BIT 3 - F-Bit Mask[27]:
This READ/WRITE bit-field is used to configure the Transmit DS3 Framer block to transmit DS3 frames with a
single/particular erred F-bit.
This particular F-bit corresponds with the 28th F-bit within a given outbound DS3 frame. The Transmit DS3 Framer
block will perform an XOR operation with the contents of this bit-field and the value of the 28th F-bit. The results of this
calculation will be written back into the 28th F-bit position, within each outbound DS3 frame.
N
OTE
:
The user should set this bit-field to 0 for normal (e.g., un-erred) operation.
BIT 2 - F-Bit Mask[26]:
This READ/WRITE bit-field is used to configure the Transmit DS3 Framer block to transmit DS3 frames with a
single/particular erred F-bit.
This particular F-bit corresponds with the 27th F-bit within a given outbound DS3 frame. The Transmit DS3 Framer
block will perform an XOR operation with the contents of this bit-field and the value of the 27th F-bit. The results of this
calculation will be written back into the 27th F-bit position, within each outbound DS3 frame.
N
OTE
:
The user should set this bit-field to 0 for normal (e.g., un-erred) operation.
BIT 1 - F-Bit Mask[25]:
T
ABLE
285: DS3 F
RAMER
B
LOCK
- T
RANSMIT
DS3 F-B
IT
M
ASK
R
EGISTERS
# 1 (A
DDRESS
= 0
X
0E36)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
F-Bit
Mask[27]
F-Bit
Mask[26]
F-Bit
Mask[25]
F-Bit
Mask[24]
R/O
R/O
R/O
R/O
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0