XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 267

• Manufacturer Part Number: XRT94L33IB-L
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L33IB-L

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
Setting this bit-field to “0” configures the Transmit SONET POH Processor block to set the REI-P bit-fields
(within the G1 byte of the “outbound” STS-1 SPE); to a value the reflects the number of bits (within the B3
byte) that were determined to be in error (within the most recently received STS-1 SPE) by the corresponding
Receive SONET POH Processor block. In this case, the REI-P bit-fields can range in value from “0” (for no
B3 bit errors) to “8” (for all B3 bits being in error).
Setting this bit-field to “1” configures the Transmit SONET POH Processor block to set the REI-P bit-fields
(within the G1 byte of the ‘outbound”STS-1 SPE); to a value that indicates whether or not at least one B3 byte
error was detected within the most recently received STS-1 SPE; by the corresponding Receive SONET POH
Processor block. In this mode, the Transmit SONET POH Processor block will set the “REI-P” bit-fields
(within the outbound STS-1 SPE) to “0” if the corresponding “Receive SONET POH Processor” block is not
detecting any B3 byte errors, in its incoming STS-1 data-stream. Conversely, the Transmit SONET POH
Processor block will set the “REI-P” bit-fields (within the “outbound” STS-1 SPE) to “1” if the corresponding
Receive SONET POH Processor block receives an STS-1 SPE that contains a B3 byte error.
2.2.8.3.3.2
The user can configure the Transmit SONET POH Processor block to transmit the REI-P indicator (per
software command) by executing the following steps.
STEP 1- Write the value “[0, 1]” into Bits 5 and 6 (REI-P Insertion Type[1:0]) within the “Transmit
SONET Path SONET Control Register – Byte 0”; as depicted below.
Transmit SONET Path – SONET Control Register – Byte 0 (Address = 0xN983)
This step configures the “Transmit SONET POH Processor” block to automatically read out the contents of
Bits 4 through 7 (of the Transmit SONET Path – G1 Byte Value” register) and write the value of these bits into
bits 1 through 4 (of the G1 byte) within the “outbound” STS-1 SPE. The bit-format of the “Transmit SONET
Path – G1 Byte Value” register (with the appropriate bits “shaded”) is presented below.
Transmit SONET Path – Transmit G1 Byte Value Register (Address = 0xN99F)
In this mode, the user can transmit an “un-erred” REI-P value by setting Bits 4 through 7 (within the Transmit
SONET Path – Transmit G1 Byte Value” register) to [0, 0, 0, 0]. Conversely, the user can transmit an “erred”
REI-P value by setting Bits 4 through 7 (within the Transmit SONET Path – Transmit G1 Byte Value” register)
to some value between 1 and 8.
F2 Insertion
B
Type
B
R/W
R/W
IT
IT
0
0
7
7
REI-P Insertion Type[1:0]
Configuring the Transmit SONET POH Processor block to transmit the REI-P Indicator,
upon software control
B
B
R/W
R/W
IT
IT
0
0
6
6
B
B
R/W
R/W
IT
IT
1
0
5
5
Transmit_G1_Byte_Value[7:0]
RDI-P Insertion Type[1:0]
B
B
R/W
R/W
IT
IT
0
0
4
4
267
B
B
R/W
R/W
IT
IT
X
0
3
3
Insertion
C2 Byte
B
Type
B
R/W
R/W
IT
IT
0
X
2
2
Auto Insert
C2 Byte
Enable
Mode
B
B
R/W
R/W
IT
IT
X
0
1
1
XRT94L33
Transmit
Enable
AIS-P
Rev.1.2.0.
B
B
R/W
R/W
IT
IT
0
0
0
0