PRELIMINARY
XRT79L71
526
REV. P2.0.0
1-CHANNEL DS3/E3 CLEAR-CHANNEL FRAMERLIU COMBO - CC/HDLC ARCHITECTURE
The Receive E3 Framer block will also generate the Change in AIS Defect Condition Interrupt request, by
asserting the Interrupt Output pin (e.g., by pulling it "Low"), and setting Bit 0 (Change in AIS Defect Condition
Interrupt Status), within the Receive E3 Interrupt Status Register # 1 to "1" as depicted below.
Clearing the AIS Defect Condition
The Receive E3 Framer block will clear the AIS Defect condition whenever it receives two consecutive E3
frames that contain 8 or more "0s", within the incoming E3 data-stream. The Receive E3 Framer block will
indicate that it is clearing the AIS defect by:
It will set Bit 3 (AIS Defect Declared) within the Receive E3 Configuration and Status Register # 2 to "0", as
depicted below.
The Receive E3 Framer block will also generate the Change in AIS Defect Condition Interrupt request, by
asserting the Interrupt Output pin (e.g., by pulling it "Low"), and setting Bit 0 (Change in AIS Defect Condition
Interrupt Status), within the Receive E3 Interrupt Status Register # 1 to "1" as depicted below.
Receive E3 Configuration and Status Register # 2 - G.832 (Address = 0x1111)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Receive LOF
Algo
LOF Defect
Declared
OOF Defect
Declared
LOS Defect
Declared
AIS Defect
Declared
RxPLD
Unstab
RxT Mark
FERF Defect
Declared
R/W
R/O
0
1
0
Receive E3 Interrupt Status Register # 1 - G.832 (Address = 0x1114)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Change in
SSM MSG
Interrupt
Status
Change in
SSM OOS
Interrupt
Status
COFA
Interrupt
Status
Change in
OOF Defect
Condition
Interrupt
Status
Change in
LOF Defect
Condition
Interrupt
Status
Change in
LOS Defect
Condition
Interrupt
Status
Change in
AIS Defect
Condition
Interrupt
Status
R/O
RUR
0
1
Receive E3 Configuration and Status Register # 2 - G.832 (Address = 0x1111)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Receive LOF
Algo
LOF Defect
Declared
OOF Defect
Declared
LOS Defect
Declared
AIS Defect
Declared
RxPLD
Unstab
RxT Mark
FERF Defect
Declared
R/W
R/O
0