XRT86VL34
62
REV. V1.2.0
QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION
T
ABLE
45: D
ATA
L
INK
C
ONTROL
R
EGISTER
(DLCR3) H
EX
A
DDRESS
: 0
X
n153
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7
SLC-96 Data
Link Enable
R/W
0
SLC96 DataLink Enable
This bit permits the user to configure the channel to support the transmission
and reception of the “SLC-96 type” of data-link message.
0 - Channel does not support the transmission and reception of “SLC-96”
type of data-link messages. Regular SF framing bits will be transmitted.
1 - Channel supports the transmission and reception of the “SLC-96” type of
data-link messages.
N
OTE
:
This bit is only active if the channel has been configured to operate in
either the SLC-96 or the ESF Framing formats.
6
MOS ABORT
Disable
R/W
0
MOS ABORT Disable:
This bit permits the user to either enable or disable the “Automatic MOS
ABORT” feature within Transmit HDLC Controller # 3. If the user enables this
feature, then Transmit HDLC Controller block # 3 will automatically transmit
the ABORT Sequence (e.g., a zero followed by a string of 7 consecutive
“1s”) whenever it abruptly transitions from transmitting a MOS type of mes-
sage, to transmitting a BOS type of message.
If the user disables this feature, then the Transmit HDLC Controller Block # 3
will NOT transmit the ABORT sequence, whenever it abruptly transitions
from transmitting a MOS-type of message to transmitting a BOS-type of
message.
0 - Enables the “Automatic MOS Abort” feature
1 - Disables the “Automatic MOS Abort” feature
5
Rx_FCS_DIS
R/W
0
Receive Frame Check Sequence (FCS) Verification Enable/Disable
This bit permits the user to configure the Receive HDLC Controller Block # 3
to compute and verify the FCS value within each incoming LAPD message
frame.
0 - Enables FCS Verification
1 - Disables FCS Verification
4
AutoRx
R/W
0
Auto Receive LAPD Message
This bit configures the Receive HDLC Controller Block #3 to discard any
incoming BOS or LAPD Message frame that exactly match which is currently
stored in the Receive HDLC3 buffer.
0 = Disables this “AUTO DISCARD” feature
1 = Enables this “AUTO DISCARD” feature.
3
Tx_ABORT
R/W
0
Transmit ABORT
This bit configures the Transmit HDLC Controller Block #3 to transmit an
ABORT sequence (string of 7 or more consecutive 1’s) to the Remote termi-
nal.
0 - Configures the Transmit HDLC Controller Block # 3 to function normally
(e.g., not transmit the ABORT sequence).
1 - Configures the Transmit HDLC Controller block # 3 to transmit the
ABORT Sequence.