TXC-04222-AIOG Transwitch Corporation, TXC-04222-AIOG Datasheet - Page 137

• Manufacturer Part Number: TXC-04222-AIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-04222-AIOG

• Screening Level: Industrial
• Package Type: BGA
• Lead Free Status / Rohs Status: Not Compliant

Address
019
Proprietary TranSwitch Corporation Information for use Solely by its Customers
7-5
Bit
4
3
2
1
0
DV1SEL
Symbol
CLPBK
PDDO
DBPE
Not used:
COMBUS SONET/SDH Local Loopback: A 1 written to this bit will
enable a COMBUS SONET/SDH loopback. This loopback is valid for
either the drop bus or add bus timing modes, and only when control bit
DV1SEL (bit 2 below) is set to 1. When this loopback is enabled, the
drop buses are inhibited from passing VT/TU to the demapper. VT/TU
are mapped and demapped according to the VT/TU add and drop selec-
tion registers.
Not used:
Drop Bus V1 Reference Enable: Common control bit for both the A and
B drop buses. When set to 0, bits 7 and 8 in the H4 byte are monitored
for the multiframe indication to determine the V1 byte location for all
VT/TUs. When set to 1, the V1 pulse in the C1J1V1 signal carries the V1
byte location for all channels. A Drop Bus Reset operation should be
performed after modifying this bit. See DRESET bit at address 039H.
A/B Drop Bus Parity Detected on Data Only: Common control bit for
both drop buses. A 1 causes parity to be calculated over the data byte
only. A 0 causes parity to be calculated over the data byte, SPE and
C1J1V1 signals. Please refer to the table provided below for DBPE con-
trol bit.
A/B Drop Bus Even Parity Detected: This bit works in conjunction with
the control bit PDDO above to determine the parity calculation in the
drop direction.
DBPE PDDO
Other than reporting the event, no action is taken upon parity error indi-
cation.
0
0
1
1
0
1
0
1
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DATA SHEET
Odd parity check over drop data, SPE, and C1J1V1.
Odd parity check over drop data only.
Even parity check over drop data, SPE, and
Even parity check over drop data only.
C1J1V1.
Action (for both A and B Drop buses)
Description
TXC-04222-MB, Ed. 6
TXC-04222
TEMx28
June 2003