xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 355

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xrt94l33

Manufacturer Part Number
xrt94l33
Description
Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
Manufacturer
Exar Corporation
Datasheet

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xr
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
Receive STS-3 Transport Interrupt Status Register – Byte 2 (Address = 0x1109)
2.3.1.5.2
The Receive STS-3 TOH Processor block will clear the RDI-L defect once it has received at least 5
consecutive STS-3 frames, in which bits 6, 7 and 8 (of the K2 byte) are set to some value other than [1, 1, 0].
Once the Receive STS-3 TOH Processor block clears the RDI-L defect, it will notify the system of this fact by
doing the following.
Receive STS-3 Transport Status Register – Byte 0 (Address = 0x1107)
Declared
Defect
RDI-L
B
B
R/O
It will generate the “Change in RDI-L Defect Condition” Interrupt, by toggling the “INT*” output pin “LOW”,
and by setting Bit 0 (Change of RDI-L Defect Condition Interrupt Status) within the “Receive STS-3
Transport Interrupt Status Register – Byte 2” to “ 1” as illustrated below.
R/O
It will set Bit 7 (RDI-L Defect Declared) within the Receive STS-3 Transport Status Register – Byte 0” to
“0” as illustrated below.
R/O
It will generate the “Change in RDI-L Defect Condition” Interrupt by toggling the “INT*” output pin “LOW”,
and by setting Bit 0 (Change of RDI-L Defect Condition Interrupt Status), within the “Receive STS-3
Transport Interrupt Status Register – Byte 2” to “1”, as illustrated below.
IT
IT
1
0
0
7
7
How the Receive STS-3 TOH Processor Block Clears the RDI-L Defect Condition
Declared
Unstable
Declared
S1 Byte
Defect
B
B
R/O
R/O
R/O
IT
IT
0
0
0
6
6
K1, K2 Byte
Declared
Declared
Unstable
Defect
B
B
R/O
R/O
R/O
IT
IT
0
0
0
5
5
Unused
SF Defect
Declared
B
B
R/O
R/O
R/O
IT
IT
0
0
0
4
4
355
SD Defect
Declared
B
B
R/O
R/O
R/O
IT
IT
0
0
0
3
3
LOF Defect
Declared
B
B
R/O
R/O
R/O
IT
IT
0
0
0
2
2
AIS-L Defect
SEF Defect
Change of
Condition
Declared
Interrupt
Status
B
RUR
B
R/O
R/O
IT
IT
0
0
0
1
1
XRT94L33
LOS Defect
Change of
Condition
Declared
Interrupt
Defect
Status
RDI-L
Rev.1.2.0.
B
B
RUR
R/O
R/O
IT
IT
0
1
0
0
0

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