XRT79L71 Datasheet, PDF (252/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
RECEIVE DS3/E3 INTERRUPT STATUS REGISTER - SECONDARY FRAME SYNCHRONIZER BLOCK
(DIRECT ADDRESS = 0X11F9)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Change of
LOS
Condition
Interrupt
Status
Change of
AIS
Condition
Interrupt
Status
Change of
DS3 Idle
Condition
Interrupt
Status
Unused
Change of
OOF
Condition
Interrupt
Status
Unused
R/O
RUR
RUR
RUR
R/O
R/O
RUR
R/O
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
7
Unused
6
Change of LOS Condition
Interrupt Status
5
Change of AIS Condition
Interrupt Status
TYPE
R/O
RUR
RUR
DESCRIPTION
Change of LOS Condition Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change of LOS Condition" Interrupt (per the Secondary Frame
Synchronizer block) has occurred since the last read of this reg-
ister.
0 - Indicates that the "Change of LOS Condition" Interrupt (per
the Secondary Frame Synchronizer block) has NOT occurred
since the last read of this register.
1 - Indicates that the "Change of LOS Condition" Interrupt (per
the Secondary Frame Synchronizer block) has occurred since
the last read of this register.
NOTE: The user can determine the current state of "LOS" (per
the Secondary Frame Synchronizer" block) by reading
out the state of Bit 6 (Secondary Frame Synchronizer -
LOS Defect Declared) within the Receive DS3/E3 Status
Register - Secondary Frame Synchronizer block"
register (Direct Address = 0x11F1).
Change of AIS Condition Interrupt Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change of AIS Condition" Interrupt (per the Secondary Frame
Synchronizer block) has occurred since the last read of this reg-
ister.
0 - Indicates that the "Change of AIS Condition" Interrupt (per
the Secondary Frame Synchronizer block) has NOT occurred
since the last read of this register.
1 - Indicates that the "Change of AIS Condition" Interrupt (per
the Secondary Frame Synchronizer block) has occurred since
the last read of this register.
NOTE: The user can determine the current state of "LOS" (per
the Secondary Frame Synchronizer" block) by reading
out the state of Bit 7 (Secondary Frame Synchronizer -
AIS Defect Declared) within the Receive DS3/E3 Status
Register - Secondary Frame Synchronizer block"
register (Direct Address = 0x11F1).
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