XRT79L71_1 Datasheet, PDF (172/434 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
2
Transmit LAPD Controller
Busy
1
Transmit LAPD Interrupt
Enable
0
Transmit LAPD Interrupt
Status
TYPE
R/O
R/W
RUR
DESCRIPTION
Transmit LAPD Controller Busy Indicator:
This READ-ONLY bit-field indicates whether or not the Transmit
LAPD Controller block is currently busy transmitting a PMDL
Message to the remote terminal equipment. The user can con-
tinuously poll this bit-field in order to check for completion of
transmission of the LAPD/PMDL Message.
0 - Indicates that the Transmit LAPD Controller block is NOT
busy transmitting a PMDL Message.
1 - Indicates that the Transmit LAPD Controller block is currently
busy transmitting a PMDL Message.
NOTE: This bit-field is only active if the Transmit LAPD Controller
block has been enabled.
Transmit LAPD Interrupt Enable:
This READ/WRITE bit-field permits the user to either enable or
disable the Transmit LAPD Interrupt. If the user enables this
interrupt, then the XRT79L71 will generate an interrupt anytime
the Transmit LAPD Controller block has completed its transmis-
sion of a given LAPD/PMDL Message to the remote terminal.
0 - Disables Transmit LAPD Interrupt.
1 - Enables Transmit LAPD Interrupt.
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 - Transmit LAPD Interrupt has NOT occurred since the last
read of this register.
1 - Transmit LAPD Interrupt has occurred since the last read of
this register.
Transmit E3 Service Bits Register - G.751 (Address = 0x1135)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
Unused
R/O
R/O
R/O
R/O
R/O
0
0
0
0
0
BIT 2
R/O
0
BIT 1
TxA
R/W
0
BIT 0
TxN
R/W
0
BIT NUMBER
NAME
7-2
Unused
1
TxA
TYPE
R/O
R/W
DESCRIPTION
Transmit A Bit:
This READ/WRITE bit-field permits the user to control the state
of the A bit, within each Outbound E3 frame, as indicated below.
0 - Forces each A bit (within the Outbound E3 frame) to "0".
1 - Forces each A bit (within the Outbound E3 frame) to "1".
NOTE: This bit-field is only valid if the Transmit E3 Framer block
has been configured to use this bit-field as the source of
the A bit (e.g., if TxASrcSel[1:0] = "0, 0").
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