xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 317

• 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
STEP 2 – Write the desired byte values (for the outbound E1 byte) into the “Transmit STS-3c
Transport – E1 Byte Value Register.
The bit-format for this register is presented below.
Transmit STS-3 Transport – Transmit E1 Byte Value Register (Address = 0x1943)
2.2.9.5.6.2
The Transmit STS-3c TOH Processor block permits the user to specify the contents of the E1 byte within the
“outbound” STS-3c data-stream via the data applied to the “TxPOH_n” input port.
The user can configure the Transmit STS-3c TOH Processor block to accomplish this by performing the
following steps.
STEP 1 – Write the value “1” into Bit 4 (STS-3c TOH Insert) within the “Mapper Control Register – Byte
2”, as depicted below.
Mapper Control Register – Byte 2 (Direct Address = 0xN601)
This step enables the “Transmit STS-3c TOH Processor” block (associated with Channel “N”) to accept its
TOH bytes via the “TxPOH Input” port.
STS-3c OH
Pass Thru
B
B
R/W
R/W
IT
IT
0
0
7
7
Loop-back
Setting and Controlling the outbound E1 byte via “TxPOH Input Port”
Remote
STS-3c
B
B
R/W
R/W
IT
IT
0
0
6
6
Local Loop-
STS-3c
B
B
back
R/W
R/W
IT
IT
0
0
5
5
Transmit_E1_Byte_Value[7:0]
TOH Insert
STS-3c
B
B
R/W
R/W
IT
IT
0
1
4
4
317
Loop-Timing
B
B
R/W
R/W
IT
IT
0
0
3
3
POH Pass
B
B
Thru
R/W
R/W
IT
IT
0
0
2
2
(Ingress)
Receive
STS-3c
Enable
B
B
R/W
R/W
IT
IT
0
0
1
1
XRT94L33
Transmit
(Egress)
STS-3c
Enable
Rev.1.2.0.
B
B
R/W
R/W
IT
IT
0
0
0
0