XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 236

• 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.
Transmit STS-3c Path – SONET Control Register – Byte 0 (Address = 0x1983)
This step configures the Transmit STS-3c POH Processor block to read out the contents of the “Transmit
STS-3c Path – Transmit C2 Byte Value” register; and load this value into the C2 byte position within each
“outbound” STS-3c SPE.
STEP 2 – Write the desired byte value (for the outbound C2 byte) into the “Transmit STS-3c Path –
Transmit C2 Byte Value” register.
The bit-format of this register is presented below.
Transmit STS-3c Path – Transmit C2 Byte Value Register (Address = 0x199F)
2.2.7.3.5.2
The Transmit STS-3c POH Processor block permits the user to specify the contents of the C2 byte, within the
“outbound” STS-3c SPE, via data applied to the “TxPOH_n” input pin.
The user can configure the Transmit STS-3c POH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 2 (C2 Byte Insertion Type) within the “Transmit STS-3c Path –
SONET Control Register – Byte 0”, as depicted below.
Transmit STS-3c Path – SONET Control Register – Byte 0 (Address = 0x1983)
This step configures the Transmit STS-3c POH Processor block to use the “TxPOH_n” input port as the
source for the C2 byte, within each “outbound” STS-3c SPE. In this mode, the Transmit STS-3c POH
Processor block will accept the value, corresponding to the C2 byte (via the “TxPOH_n” input port) and it will
write this data into the C2 byte position, within the “outbound” STS-3c SPE.
STEP 2 – Begin providing the values of the “outbound” C2 byte to the “TxPOH_n” input port.
The procedure for applying the C2 byte to the “TxPOH_n” input port is presented below.
F2 Insertion
F2 Insertion
B
Type
B
B
Type
R/W
R/W
R/W
IT
IT
IT
0
0
0
7
7
7
REI-P Insertion Type[1:0]
REI-P Insertion Type[1:0]
Setting and Controlling the Outbound C2 Byte via the “TxPOH_n Input Port”
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
6
6
6
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
5
5
5
Transmit_C2_Byte_Value[7:0]
RDI-P Insertion Type[1:0]
RDI-P Insertion Type[1:0]
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
4
4
4
236
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
3
3
3
Insertion
Insertion
C2 Byte
C2 Byte
B
Type
B
B
Type
R/W
R/W
R/W
IT
IT
IT
0
0
1
2
2
2
Unused
Unused
B
B
B
R/W
R/O
R/O
IT
IT
IT
0
0
0
1
1
1
xr
Transmit
Transmit
Enable
Enable
AIS-P
AIS-P
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
0
0
0