XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 313

• 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

xr
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
• Automatically set the J0 byte (within each outbound STS-3 Frame) to “0x01”
• Set and control the outbound J0 byte via on-chip register
• Set and control the outbound J0 byte via external input pin
• Use the “Transmit Section Trace Message” buffer
The details and instructions for using either of these features are presented below.
2.2.9.5.5.1
The XRT94L33 permits the user to configure each of the four (4) Transmit STS-3 TOH Processor blocks to
automatically set the contents of the J0 byte (within each outbound STS-3 frame) to “0x01”.
The user can accomplish this by writing the value “[0, 0]” into Bits 1 and 0 (J0 Type[1:0]) within the
appropriate “Transmit STS-3 Transport – Transmit J0 Byte Control” Register; as depicted below.
Transmit STS-3 Transport – Transmit J0 Byte Control Register (Address = 0x194F)
Once the user executes this step, then the corresponding Transmit STS-3 TOH Processor block(s) will be
configured to automatically set the J0 byte (within each outbound STS-3 frame) to the value “0x01”.
2.2.9.5.5.2
The XRT94L33 contains a total of four (4) “Transmit Section Trace Message” Buffers (one for each “Transmit
STS-3 POH Processor block, within the device).
Message” buffer for each of the four Transmit STS-3 TOH Processor blocks is presented below.
Table 17: Address Locations of the Transmit Section Trace Message Buffers within the XRT94L33
If the user wishes to use the “Section Trace Message” buffer as the means to load and transmit the “Section
Trace Message” to the remote STE, then they must execute the following steps.
STEP 1 – Write the contents of this outbound “Section Trace Message” into the “Transmit Section
Trace Message” Buffer.
As the user writes the contents of the “outbound” Section Trace Message” into the “Transmit Section Trace”
Message buffer they must make sure that the first byte of the message is written into Address location
0xNB00 (e.g., the very first address location of the “Transmit Section Trace Message” buffer).
STEP 2 – Specify the length of this “Section Trace Message” by writing the appropriate value into Bits
3 and 2 (J0 Message Length[1:0]) within the “Transmit STS-3 Transport – Transmit J0 Byte Control”
Register; as depicted below.
B
T
R/O
IT
RANSMIT
0
7
STS-3 TOH P
Automatically setting the J0 byte (within each outbound STS-3 frame) to “0x01”
Transmitting 16-byte/64-byte Section Trace Messages using the “Transmit Section
Trace Message” Buffer
B
R/O
C
IT
0
HANNEL
6
0
1
2
3
Unused
ROCESSOR
B
R/O
IT
0
B
5
LOCK
-
B
R/O
IT
0
4
A
DDRESS
313
The address location of the “Transmit Section Trace
J0 Message Length[1:0]
B
R/W
L
IT
X
OCATION OF THE
3
0x1B00 – 0x1B3F
0x2B00 – 0x2B3F
0x3B00 – 0x3B3F
0x4B00 – 0x4B3F
B
R/W
IT
T
X
B
RANSMIT
2
UFFER
S
ECTION
B
R/W
IT
0
1
J0 Type[1:0]
T
RACE
XRT94L33
M
ESSAGE
Rev.1.2.0.
B
R/W
IT
0
0