XRT79L71 Datasheet, PDF (156/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
2
Change in LOF State
Interrupt Status
1
Change in LOS State
Interrupt Status
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TYPE
RUR
RUR
DESCRIPTION
Change of LOF (Loss of Frame) Condition Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change of LOF Condition" 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 in response to either of the following condi-
tion.
• Whenever the Frame Synchronizer block declares the LOF
Condition.
• Whenever the Frame Synchronizer block clears the LOF
Condition.
0 - The "Change in LOF Condition" Interrupt has NOT occurred
since the last read of this register.
1 - The "Change in LOF Condition" Interrupt has occurred since
the last read of this register.
NOTE: The user can obtain the current LOF state of the DS3/E3
Framer block by reading out the state of Bit 6 (RxLOF)
within the "RxE3 Configuration and Status # 2 - G.751"
(Direct Address = 0x1111).
Change of LOS (Loss of Signal) Condition Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change of LOS Condition" 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 in response to either of the following condi-
tion.
• Whenever the Frame Synchronizer block declares the LOS
Condition.
• Whenever the Frame Synchronizer block clears the LOS
Condition.
0 - The "Change of LOS Condition" Interrupt has NOT occurred
since the last read of this register.
1 - The "Change of LOS Condition" Interrupt has occurred since
the last read of this register.
NOTE: The user can obtain the current LOS state of the DS3/E3
Framer block by reading out the state of Bit 4 (RxLOS)
within the "RxE3 Configuration and Status # 2 - G.751"
(Direct Address = 0x1111).
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