xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 325

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

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
2.2.9.5.10
2.2.9.5.11
The Transmit STS-3c TOH Processor block permits the user to control the value of the S1 byte, which is to be
transmitted via the “outbound” STS-3c data-stream, by either or the following options.
• Setting and controlling the S1 byte via software
• Setting and controlling the S1 byte via the “TxPOH Input Port”
The details and instructions for using either of these features are presented below.
2.2.9.5.11.1
The Transmit STS-3c TOH Processor block permits the user to specify the contents of the E1 byte within the
outbound STS-3c data-stream via software command.
The user can configure the Transmit STS-3c TOH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 2 (S1 Insert Method) within the “Transmit STS-3c Transport –
SONET Transmit Control Register – Byte 1, as depicted below.
Transmit STS-3Transport – SONET Transmit Control Register – Byte 1 (Address = 0x1902)
The step configures the Transmit STS-3c TOH Processor block to read out the contents of the “Transmit
STS-3c Transport – S1 Byte Value Register, and load this value into the S1 byte position within each
outbound STS-3c data-stream.
STEP 2 – Write the desired byte values (for the outbound S1 byte) into the “Transmit STS-3c
Transport – S1 Byte Value Register.
The bit-format for this register is presented below.
Transmit STS-3 Transport – Transmit S1 Byte Value Register (Address = 0x193B)
2.2.9.5.11.2
The Transmit STS-3c TOH Processor block permits the user to specify the contents of the S1 byte within the
“outbound” STS-3c data-stream via the data applied to the “TxPOH_n” input port.
The user can configure the Transmit STS-3c TOH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 4 (STS-3c TOH Insert) within the “Mapper Control Register – Byte 2”, as
depicted below.
B
B
R/W
R/O
IT
IT
0
0
7
7
Reserved
SUPPORT/HANDLING OF THE LINE DCC (D4 THROUGH D12) BYTE
SUPPORT/HANDLING OF THE S1 BYTE
Setting and Controlling the outbound S1 byte via Software
Setting and Controlling the outbound S1 byte via “TxPOH Input Port”
B
B
R/W
R/O
IT
IT
0
0
6
6
E2 Insert
Method
B
B
R/W
R/W
IT
IT
X
0
5
5
Transmit_S1_Byte_Value[7:0]
E1 Insert
Method
B
B
R/W
R/W
IT
X
IT
0
4
4
325
F1 Insert
Method
B
B
R/W
R/W
IT
IT
X
0
3
3
S1 Insert
Method
B
B
R/W
R/W
IT
IT
1
0
2
2
K1K2 Insert
Method
B
B
R/W
R/W
IT
IT
X
0
1
1
XRT94L33
M0M1 Insert
Method[1]
Rev.1.2.0.
B
B
R/W
R/W
IT
IT
X
0
0
0