xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 322

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

XRT94L33
Rev.1.2.0.
2.2.9.5.8
2.2.9.5.9
The Transmit STS-3c TOH Processor block permits the user to control the value of the K1 and K2 bytes,
which are to be transmitted via the “outbound” STS-3c data-stream, by either or the following options.
• Setting and controlling the K1, K2 bytes via software
• Setting and controlling the K1, K2 bytes via the “TxPOH Input Port”
The details and instructions for using either of these features are presented below.
2.2.9.5.9.1
The Transmit STS-3c TOH Processor block permits the user to specify the contents of the K1 and K2 bytes
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 1 (K1K2 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 – K1K2 (APS) Value Registers (Bytes 0 and 1), and load these values into the K1 and K2
byte positions within each outbound STS-3c data-stream.
STEP 2 – Write the desired byte values (for the outbound K1 and K2 bytes) into the “Transmit STS-3c
Transport – K1K2 (APS) Value Registers – (Bytes 0 and 1).
The bit-format for these two registers is presented below.
Transmit STS-3 Transport – K1K2 (APS) Value Register – Byte 1 (Address = 0x192E)
Transmit STS-3 Transport – K1K2 (APS) Value Register – Byte 1 (Address = 0x192F)
B
B
B
R/W
R/W
R/O
IT
IT
IT
0
0
0
7
7
7
Reserved
SUPPORT/HANDLING OF THE SECTION DCC (D1, D2 AND D3) BYTES
SUPPORT/HANDLING OF THE K1/K2 BYTES
Setting and Controlling the outbound K1, K2 bytes via Software
B
B
B
R/W
R/W
R/O
IT
IT
IT
0
0
0
6
6
6
E2 Insert
Method
B
B
B
R/W
R/W
R/W
IT
X
IT
IT
0
0
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
5
5
5
Transmit_K2_Byte_Value[7:0]
Transmit_K1_Byte_Value[7:0]
E1 Insert
Method
B
B
B
R/W
R/W
R/W
IT
IT
IT
X
0
0
4
4
4
322
F1 Insert
Method
B
B
B
R/W
R/W
R/W
IT
X
IT
IT
0
0
3
3
3
S1 Insert
Method
B
B
B
R/W
R/W
R/W
IT
IT
IT
X
0
0
2
2
2
K1K2 Insert
Method
B
B
B
R/W
R/W
R/W
IT
IT
IT
1
0
0
1
1
1
xr
M0M1 Insert
Method[1]
B
B
B
R/W
R/W
R/W
IT
IT
IT
X
0
0
0
0
0