TXC-03453BROG Transwitch Corporation, TXC-03453BROG Datasheet - Page 69

• Manufacturer Part Number: TXC-03453BROG
• Manufacturer: Transwitch Corporation

Specifications of TXC-03453BROG

• Screening Level: Industrial
• Package Type: BGA
• Lead Free Status / Rohs Status: Compliant

PER CHANNEL CONTROL BIT DESCRIPTIONS
Note: Registers XC0-XCA are set to FFH in the event of a hardware or software reset. The X in the Register
addresses, where X = 1, 2, or 3, corresponds to the selected channel:
Address
(cont.)
XC0
XC0
Bit
Proprietary TranSwitch Corporation Information for use Solely by its Customers
7
6
5
4
3
2
1
0
Symbol
BFOM1
BFOM0
DPOS1
DPOS0
APOS1
APOS0
DS3
SDH/SONET Bus Operating Format Control Bits: These bits determine
the bus operating format according to the table given below: The SDH/
SONET bus operating format control bits must be set to the same value for
all three channels.
BFOM1
Dropped TUG-3/STS-1 Selection: These bits determine which TUG-3 or
STS-1 is to be dropped to the channel from the STM-1 or STS-3 according
to the table given below. The same TUG-3 or STS-1 may be dropped to
one or more channels depending upon the application. Unused channels
should be assigned a TUG-3 and, if desired, the Receive Output Enable bit
(Bit 0 of Address XC2H, L3OEN) can be set to 0 (High-Z).
DPOS1
Add TUG-3/STS-1 Selection: These bits determine which TUG-3 or
STS-1 SPE is to be added from the channel to the STM-1 or STS-3,
according to the table given below: Each channel must have a different
TUG-3 or STS-1 selection to prevent bus contention. If more than one
channel is assigned to the same TUG-3 or STS-1, a common bus conten-
tion alarm (ADBCN) will occur. Unused channels should be added to an
unassigned TUG-3 position and the Add Bus Enable bit (Bit 1 of Address
XC2H, ADBEN) should be set to 0 (High-Z).
APOS1
Reserved: Must be set to zero when register is written.
DS3 Mode: Determines the line to SDH/SONET mapping mode according
to the table given below:
DS3
0
1
0
0
1
1
0
0
1
1
0
0
1
1
DATA SHEET
BFOM0
DPOS0
APOS0
Mapping Mode
E3 (34.368 Mbit/s)
DS3 (44.736 Mbit/s)
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0
1
0
1
0
1
0
1
0
1
0
1
Mapping Format
Future Use
STS-3
Future Use
STM-1 TUG-3
Mapping
TUG-3 position A (or STS-1 #1)
TUG-3 position B (or STS-1 #2)
TUG-3 position C (or STS-1 #3)
Do not use
Mapping
TUG-3 position A (or STS-1 #1)
TUG-3 position B (or STS-1 #2)
TUG-3 position C (or STS-1 #3)
Do not use
Description
PRELIMINARY TXC-03453B-MB, Ed. 3
TXC-03453B
September 2003
TL3M