TXC-06101AILQ Transwitch Corporation, TXC-06101AILQ Datasheet - Page 169

• Manufacturer Part Number: TXC-06101AILQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-06101AILQ

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: PQFP
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

TRANSMIT POH ASSEMBLY
The Tx OH Generator is responsible for assembling the POH that will be output on the Tx Line. The Payload
portion of the SPE is input from the Tx Terminal Processor. In general, the POH Bytes have three possible
sources:
TPATH = "0" selects Option One. When set to "1", options two or three are enabled. These two options make
use of the Tx Insert POH Byte locations shown in Table 22.
The 64-Byte J1 Segment is common to Tx Terminal Input storage and Tx Line Insert storage. When TPATH =
"1" the designated Insert J1 Values occupy these locations. When the J1 Locations are being filled from the Tx
POH Port, J1SYNCEN controls whether the storage is rotating or synchronized as explained above in the
"Input POH Storage" section. The B3 location contains an internally generated value. The calculation is Even
Parity, independently performed, in parallel, over the eight bit positions of the SPE Bytes to be transmitted. The
value calculated for Frame n is placed in the B3 Byte of Frame n+1. All other locations, when enabled, are
available for writing by the µPro. Table
1. The POH Bytes input at the Tx Terminal Port
2. Information written by the µPro.
3. The POH Bytes input at the Tx POH Port
Proprietary TranSwitch Corporation Information for use Solely by its Customers
Table 22. Tx Insert POH Locations
Note: Used for Insert if TPATH = "1"
23
Byte
presents the available options for Transmit POH.
(B3)
C2
G1
H4
F2
Z3
Z4
Z5
J1
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DATA SHEET
180[H] - 1BF[H]
Location
1CC[H]
1CD[H]
1CA[H]
1CB[H]
1CE[H]
1CF[H]
1C8[H]
1C9[H]
TXC-06101
Ed. 3, April 2001
TXC-06101-MB
PHAST-1