XRT79L71 Datasheet, PDF (171/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
4
COFA Interrupt Status
3
Change in OOF State
Interrupt Status
2
Change in LOF State
Interrupt Status
TYPE
RUR
RUR
RUR
DESCRIPTION
COFA Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"COFA" (Change of Framing Alignment) Interrupt has occurred
since the last read of this register.
If this interrupt is enabled, then the DS3/E3 Framer block will
generate an interrupt anytime it detects a new "Framing Align-
ment" with the incoming E3 data-stream.
0 - Indicates that the "COFA Interrupt" has not occurred since the
last of this register.
1 - Indicates that the "COFA Interrupt" has occurred since the
last read of this register.
Change in OOF (Out of Frame) State Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change in OOF State" Interrupt has occurred since the last
read of this register.If this interrupt is enabled, then the DS3/E3
Framer block will generate the "Change in OOF State" Interrupt
in response to the following events.
• When the DS3/E3 Frame Synchronizer block declares the
"OOF Condition".
• When the DS3/E3 Frame Synchronizer block clears the "OOF
Condition".
0 - Indicates that the "Change in OOF State Interrupt" has not
occurred since the last of this register.
1 - Indicates that the "Change in OOF State Interrupt" has
occurred since the last read of this register.
NOTE:
The user can determine the current state of the "AIS
Condition" by reading out the contents of Bit 5 (RxOOF)
within the "RxE3 Configuration and Status Register # 2 -
G.832" (Direct Address = 0x1111).
Change in LOF (Loss of Frame) State Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change in LOF State" Interrupt has occurred since the last read
of this register.If this interrupt is enabled, then the DS3/E3
Framer block will generate the "Change in LOF State" Interrupt
will occur in response to the following events.
• When the DS3/E3 Frame Synchronizer block declares the
"LOF Condition".
• When the DS3/E3 Frame Synchronizer block clears the "LOF
Condition".
0 - Indicates that the "Change in LOF State Interrupt" has not
occurred since the last of this register.
1 - Indicates that the "Change in LOF State Interrupt" has
occurred since the last read of this register.
NOTE:
The user can determine the current state of the "AIS
Condition" by reading out the contents of Bit 6 (RxLOF)
within the "RxE3 Configuration and Status Register # 2 -
G.832" (Direct Address = 0x1111).
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