XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 273

• 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
2.2.8.3.5
The Transmit SONET POH Processor block permits the user to control the value of the C2 byte by either of
the following options.
• Setting and controlling the “outbound” C2 Byte via Software
• Setting and controlling the “outbound” C2 Byte via the “TxPOH Input Port”
The details and instructions for using either or these features are presented below.
2.2.8.3.5.1
The Transmit SONET POH Processor block permits the user to specify the contents of the C2 byte, within the
“outbound” STS-1 SPE via software command.
The user can configure the Transmit SONET POH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “0” into Bit 2 (C2 Insertion Type) 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 read out the contents of the “Transmit
SONET Path – Transmit C2 Byte Value” register; and load this value into the C2 byte position within each
“outbound” STS-1 SPE.
STEP 2 – Write the desired byte value (for the outbound C2 byte) into the “Transmit SONET Path –
Transmit C2 Byte Value” register.
Transmit SONET Path – Transmit C2 Byte Value Register (Address = 0xN99F)
F2 Insertion
B
Type
B
R/W
R/W
IT
IT
0
0
7
7
SUPPORT/HANDLING OF THE C2 BYTE
REI-P Insertion Type[1:0]
Setting and Controlling the Outbound C2 Byte via Software
B
B
R/W
R/W
IT
IT
0
0
6
6
B
B
R/W
R/W
IT
IT
0
0
5
5
Transmit_C2_Byte_Value[7:0]
RDI-P Insertion Type[1:0]
B
B
R/W
R/W
IT
IT
0
0
4
4
273
B
B
R/W
R/W
IT
IT
0
0
3
3
Insertion
C2 Byte
B
Type
B
R/W
R/W
IT
IT
0
0
2
2
Unused
B
B
R/W
R/O
IT
IT
0
0
1
1
XRT94L33
Transmit
Enable
AIS-P
Rev.1.2.0.
B
B
R/W
R/W
IT
IT
0
0
0
0