XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 304

• 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.
2.2.9.5.4.2
The user can configure the Transmit STS-3 TOH Processor block to transmit the REI-L indicator (per software
command) by executing the following steps.
STEP 1 – Write the value “0” into Bit 0 (M0M1 Insert Method[1]) 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)
STEP 2 – Write the value “1” into Bit 7 (M0M1 Insert Method[0]) within the “Transmit STS-3 Transport
– SONET Transmit Control Register – Byte 0” as depicted below.
Transmit STS-3 Transport – SONET Transmit Control Register – Byte 0 (Address = 0x1902)
Steps 1 and 2 configure the Transmit STS-3 TOH Processor block to automatically read out the contents of
Bit 0 through 3 (of the Transmit STS-3 Transport – M0M1 Byte Value Register) and write the value of these
bits into Bits 5 through 8 (of the M0M1 byte) within the “outbound” STS-3 frame. The bit-format of the
“Transmit STS-3 Transport – Transmit M0M1 Byte Value” Register (with the appropriate bits “shaded”) is
presented below.
Transmit STS-3 Transport – M0M1 Value Register (Address = 0x1937)
In this mode, the user can transmit an “un-erred” REI-L value by setting Bits 0 through 3 (of the Transmit
STS-3 Transport – Transmit M0M1 Byte Value Register) to “[0, 0, 0, 0]”. Conversely, the user can transmit an
“erred” REI-L value by setting bits 0 through 3 (within the Transmit STS-3 Transport – Transmit M0M1 Byte
Value Register) to some value between 1 and 8.
A
The Transmit STS-3 TOH Processor block will transmit the Line – Remote Error Indicator to the remote
terminal equipment. In an STS-3 frame, the REI-L indicator will be transmitted within the M0 byte. The bit-
format
M0M1 Insert
Method[0]
UTOMATIC
B
B
B
R/W
R/W
R/O
IT
IT
IT
0
1
0
7
7
7
Reserved
T
RANSMISSION OF THE
of
Configuring the Transmit STS-3 TOH Processor block to transmit the REI-L indicator,
upon Software Command
Unused
B
B
B
R/W
R/O
R/O
IT
IT
IT
0
0
0
6
6
6
the
RDI-L Force
E2 Insert
Method
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
REI-L I
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
5
5
5
M0
Transmit_M0M1_Byte_Value[7:0]
NDICATOR
AIS-L Force
E1 Insert
Method
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
4
4
4
byte
304
LOS Force
F1 Insert
Method
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
3
3
3
is
Scramble
S1 Insert
Method
Enable
B
B
B
R/W
R/W
R/W
presented
IT
IT
IT
0
0
0
2
2
2
K1K2 Insert
B2 Error
Method
Insert
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
1
1
1
xr
below
M0M1 Insert
A1A2 Error
Method[1]
Insert
B
B
B
R/W
R/W
R/W
IT
IT
IT
0
0
0
0
0
0
in