
XRT79L71
REV. P1.0.3
PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
á
240
RECEIVE DS3/E3 INTERRUPT STATUS REGISTER - SECONDARY FRAME SYNCHRONIZER BLOCK
(DIRECT ADDRESS = 0X11F9)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
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
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION
7
Unused
R/O
6
Change of LOS Condition
Interrupt Status
RUR
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.
N
OTE
:
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).
5
Change of AIS Condition
Interrupt Status
RUR
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.
N
OTE
:
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).