XRT79L71_1 Datasheet, PDF (142/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
REV. 1.0.0
BIT NUMBER
NAME
0
Transmit LAPD Interrupt
Status
TYPE
RUR
DESCRIPTION
Transmit LAPD Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
Transmit LAPD Interrupt has occurred since the last read of this
register.
0 - Indicates that the Transmit LAPD Interrupt has NOT occurred
since the last read of this register.
1 - Indicates that the Transmit LAPD Interrupt has occurred
since the last read of this register.
Transmit DS3 M-Bit Mask Register (Address = 0x1135)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
TxFEBEDat[2:0]
FEBE
Register
Enable
Tx P-Bit
Error
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
BIT 2
BIT 1
BIT 0
TxM_Bit_Mask[2:0]
R/W
R/W
R/W
0
0
0
BIT NUMBER
NAME
7-5
TxFEBEDat[2:0]
4
FEBE Register Enable
TYPE
R/W
R/W
DECRIPTION
Transmit FEBE Value:
These READ/WRITE bit-fields, along with FEBE Register
Enable permit the user to configure the Transmit DS3 Framer
block to transmit user specified FEBE values (to the remote ter-
minal) based upon the contents of these bit-fields.
If the user sets the FEBE Register Enable bit-field to "1", then
the Transmit DS3 Framer block will write the contents of these
bit-fields into the FEBE bits, within each outbound DS3 frame.
If the user sets the FEBE Register Enable bit-field to "0" then
these register bits will be ignored.
Transmit FEBE (by Software) Enable:
This READ/WRITE bit-field permits the user to configure the
Transmit DS3 Framer block to transmit user specified FEBE val-
ues (to the remote terminal) per register setting via the TxFEBE-
Dat[2:0] bit-field. This option provides the user with software
control over the Outbound FEBE values, within the 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
companion Receive DS3 Framer block.
1 - Configures the Transmit DS3 Framer block to write the con-
tents of the TxFEBEDat[2:0] bit-fields into the FEBE bits, within
each Outbound DS3 frame.
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