xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 391
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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
1.XRT94L33.pdf
(465 pages)
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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
Receive STS-3c Path – SONET Receive Path Interrupt Status – Byte 0 (Address = 0x118B)
Note:
Configuring the Receive STS-3c POH Processor block to increment the “Receive STS-3c Path – B3
Error Count” register on a “per B3 bit-error” basis
The user can configure the Receive STS-3c POH Processor block to increment the “Receive STS-3c Path –
B3 Error Count” Register by the number of “B3 bits” which are determined to be in error. Therefore, in this
mode, it is possible for the Receive STS-3c POH Processor block to increment this register by as much as the
value of “8” per STS-3c SPE.
The user can accomplish this by setting Bit 0 (B3 Error Type) within the “Receive STS-3c Path – Control
Register – Byte 0” to “0”, as illustrated below.
Receive STS-3c Path – Control Register – Byte 0 (Address = 0x1183)
Note:
The detection of B3 byte errors also plays a role in the transmission of the REI-P (Path – Remote Error
Indicator) back out to the Remote Terminal Equipment. This item will be discussed in some detail in Section
_.
2.3.2.4
2.3.2.4.1
2.3.2.4.2
2.3.2.5
2.3.2.5.1
2.3.2.5.2
Detection of
Interrupt
B3 Byte
Status
B
Error
B
RUR
b. It will increment the “Receive STS-3c Path – B3 Error Count” registers. The “Receive STS-3c Path –
R/O
IT
IT
1
0
7
7
B3 Error Count” register is actually a 32 bit register that resides at Direct Address 0xNA98 – 0xNA9B.
The Receive STS-3c POH Processor block will increment these registers either by the number of erred STS-3c
If the user implements this setting, then the corresponding Transmit STS-3c POH Processor block will set the
SPEs detected, or by the number of B3 bits that are detected to be in error (within a given STS-3c frame),
depending upon user selection, as described below.
REI-P nibble value (within the G1 byte) to the number of B3 bits that have been determined to be in error. In
this case, the REI-P nibble value can contain a number as high as “8” for each “outbound” STS-3c frame.
HANDLING/PROCESSING THE C2 BYTE
RECEIVING/PROCESSING INCOMING PATH TRACE MESSAGES VIA THE J1 BYTE
UNEQ-P DECLARATION AND CLEARANCE CRITERIA
PLM-P DECLARATION AND CLEARANCE CRITERIA
TIM-P DECLARATION AND CLEARANCE CRITERIA
PATH TRACE UNSTABLE DEFECT DECLARATION AND CLEARANCE CRITERIA
New Pointer
Detection of
Interrupt
Status
B
RUR
B
R/O
IT
IT
0
0
6
6
Unused
Detection of
Unknown
Interrupt
Pointer
Status
B
RUR
B
R/O
IT
IT
0
0
5
5
Detection of
Decrement
Interrupt
Pointer
Status
B
RUR
B
R/O
IT
IT
0
0
4
4
391
Detection of
Increment
Interrupt
Pointer
Status
Check
B
RUR
B
Stuff
R/W
IT
IT
0
0
3
3
NDF Pointer
Detection of
Interrupt
Status
RDI-P
B
RUR
B
Type
R/W
IT
IT
0
0
2
2
Error Type
Change of
Condition
Interrupt
LOP-P
Status
REI-P
B
RUR
B
R/W
IT
IT
0
0
1
1
XRT94L33
Change of
Condition
Interrupt
B3 Error
Status
AIS-P
Rev.1.2.0.
B
RUR
B
Type
R/W
IT
IT
0
1
0
0
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