xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 384
![no-image](/images/manufacturer_photos/0/2/243/exar_corporation_sml.jpg)
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
1.XRT94L33.pdf
(465 pages)
Available stocks
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Quantity
Price
Part Number:
xrt94l33IB
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
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Part Number:
xrt94l33IB-L
Manufacturer:
Exar Corporation
Quantity:
10 000
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XRT94L33
Rev.1.2.0.
Additionally, now suppose that the user writes in the value “0x000100” into the “Receive STS-3 Transport –
Receive SF Clear Monitor Interval” Registers; as depicted below.
Receive STS-3 Transport – Receive SF Clear Monitor Interval – Byte 2 (Address = 0x115D)
Receive STS-3 Transport – Receive SF Clear Monitor Interval – Byte 1 (Address = 0x115E)
Receive STS-3 Transport – Receive SF Clear Monitor Interval – Byte 0 (Address = 0x115F)
Once the user has executed these two steps, then the “SF Clearance Criteria” will be as summarized below.
• B2 Error Threshold = 0x08 (or 8) B2 Errors
• SF Clear Interval = 0x100 (or 256 SONET frame periods)
Hence, the Receive STS-3 TOH Processor block will accumulate B2 errors over 256 SONET frame periods.
At this point, the Receive STS-3 TOH Processor block will proceed to count B2 errors. If the Receive STS-3
TOH Processor block is currently declaring the SF condition; it will now clear the SF condition if it detects less
than 8 B2 errors, within a 32ms period (e.g., 256 SONET frame periods); then it will clear the SF condition.
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
7
7
7
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
6
6
6
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
5
5
5
SF_CLEAR_MONITOR_WINDOW[23:16]
SF_CLEAR_MONITOR_WINDOW[15:8]
SF_CLEAR_MONITOR_WINDOW[7:0]
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
4
4
4
384
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
3
3
3
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
2
2
2
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
1
1
1
xr
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
1
0
0
0
0
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