XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 328

• 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

XRT94L33
Rev.1.2.0.
2.2.9.5.12
2.2.9.5.13
The Transmit STS-3 TOH Processor block permits the user to control the value of the E2 byte, which is to be
transmitted via the “outbound” STS-3 data-stream, by either or the following options.
• Setting and controlling the E2 byte via software
• Setting and controlling the E2 byte via the “TxPOH Input Port”
The details and instructions for using either of these features are presented below.
2.2.9.5.13.1
The Transmit STS-3 TOH Processor block permits the user to specify the contents of the E2 byte within the
outbound STS-3 data-stream via software command.
The user can configure the Transmit STS-3 TOH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 5 (E2 Insert Method) within the “Transmit STS-3 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-3 TOH Processor block to read out the contents of the “Transmit STS-
3 Transport – E2 Byte Value Register, and load this value into the E2 byte position within each outbound
STS-3 data-stream.
STEP 2 – Write the desired byte values (for the outbound E2 byte) into the “Transmit STS-3 Transport
– E2 Byte Value Register.
The bit-format for this register is presented below.
Transmit STS-3 Transport – Transmit E2 Byte Value Register (Address = 0x1947)
2.2.9.5.13.2
The Transmit STS-3 TOH Processor block permits the user to specify the contents of the E2 bytes within the
“outbound” STS-3 data-stream via the data applied to the “TxPOH_n” input port.
The user can configure the Transmit STS-3 TOH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 4 (STS-3 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 M1 BYTE
SUPPORT/HANDLING OF THE E2 BYTE
Setting and Controlling the outbound E2 byte via Software
Setting and Controlling the outbound E2 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
1
0
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
5
5
Transmit_E2_Byte_Value[7:0]
E1 Insert
Method
B
B
R/W
R/W
IT
IT
X
0
4
4
328
F1 Insert
Method
B
B
R/W
R/W
IT
X
IT
0
3
3
S1 Insert
Method
B
B
R/W
R/W
IT
IT
X
0
2
2
K1K2 Insert
Method
B
B
R/W
R/W
IT
X
IT
0
1
1
xr
M0M1 Insert
Method[1]
B
B
R/W
R/W
IT
IT
X
0
0
0