xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 285

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

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
2.2.8.3.8.2
The Transmit SONET POH Processor block permits the user to specify the contents of the Z3 byte, within the
“outbound” STS-1 SPE, via data applied to the “TxPOH_n” input pin.
The user can configure the Transmit SONET POH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 1 (Z3 Byte Insertion Type) within the “Transmit SONET Path –
SONET Control Register – Byte 1”, as depicted below.
Transmit SONET Path – SONET Control Register – Byte 1 (Address = 0xN982)
This step configures the Transmit SONET POH Processor block to use the “TxPOH_n” input port as the
source for the Z3 byte, within each “outbound” STS-1 SPE.
Processor block will accept the value, corresponding to the Z3 byte (via the “TxPOH_n” input port) and it will
write this data into the Z3 byte position, within the “outbound” STS-1 SPE.
B
R/W
R/O
IT
0
0
7
Setting and Controlling the Outbound Z3 Byte via the “TxPOH_n Input Port”
B
R/W
R/O
IT
0
0
6
Unused
B
R/W
R/O
IT
0
0
5
B
R/W
R/O
IT
0
0
4
285
Z5 Insertion
Type
B
R/W
R/W
IT
0
0
3
In this mode, the Transmit SONET POH
Z4 Insertion
B
Type
R/W
R/W
IT
0
0
2
Z3 Insertion
B
Type
R/W
R/W
IT
0
1
1
XRT94L33
H4 Insertion
Rev.1.2.0.
B
Type
R/W
R/W
IT
0
0
0