TXC-03453BROG Transwitch Corporation, TXC-03453BROG Datasheet - Page 87

• 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 RECEIVE PATH OVERHEAD BYTES, TUG-3 H1/H2 BYTES AND O-BIT DESCRIPTIONS
The selected TUG-3 or STS-3 STS-1 received path overhead bytes are written into the locations given below,
and are also provided at the receive path overhead byte interface for use by external circuitry, as required. The
relationship between a received path overhead byte and the corresponding RAM location is as follows:
Bits of RAM Location:
Bits of Received POH Byte:
Address
Where X=1, 2, or 3, which corresponds to the selected channel:
X50 to
7
1
X9A
X8F
X90
X91
X92
X93
X94
X95
X96
X97
X98
X99
6
2
7-2
Bit
7-0
7-0
7-0
7-0
7-0
7-0
7-0
7-0
7-0
7-0
7-0
Proprietary TranSwitch Corporation Information for use Solely by its Customers
1
0
5
3
4
4
Symbol
ROBIT2
ROBIT1
C2
G1
H4
N1
H1
H2
B3
F2
F3
K3
J1
3
5
Receive Path Trace: The received J1 bytes are written into this 64-byte
segment in a rotating fashion. There is no specific starting point.
Receive Path B3 Byte: This register provides the received B3 parity byte.
Receive Path Signal Label: These bits indicate the construction of the
AU-3, TUG-3, or SPE (e.g., unequipped).
Receive G1 Byte: This location provides the receive status of the REI bits
(bits 7-4), Path RDI (bit 3), and any unassigned bits in the G1 byte (bits 2-0).
Receive F2 (User) Channel: This register provides the F2 path overhead
byte.
Receive H4 Byte: This byte is not specified for use in this application. It is
provided for future use as required.
Other Receive Path Overhead Bytes: These registers provide access to
the F3, K3, and N1 bytes, as required.
Received TUG-3 H1 and H2 Pointer Bytes: The contents of the H1 and
H2 pointer bytes for a TUG-3 are provided in the following bit order for
microprocessor read access.
Bit 7 6 5 4 3 2 1 0
Not Used
Receive O-Bits: The received states of the two Overhead Communication
channel bits found in the nine subframes in the DS3 format or the three
TranSwitch-designated subframes in the E3 format. The two bits are
updated once a frame from one of the subframes in the frame.
2
6
N N N N S S I D
Receive G1 Bit
1
7
RAM Bit
DATA SHEET
H1 (X98H)
0
8
- 87 of 96 -
7
1
6
2
Description
7 6 5 4 3 2 1 0
I
5
3
D I
4
4
D I
H2 (X99H)
PRELIMINARY TXC-03453B-MB, Ed. 3
3
5
D I
2
6
D
1
7
0
8
TXC-03453B
September 2003
TL3M