TXC-04252AIPQ Transwitch Corporation, TXC-04252AIPQ Datasheet - Page 121

• Manufacturer Part Number: TXC-04252AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-04252AIPQ

• Pin Count: 160
• Screening Level: Industrial
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

PORT n - RECEIVE STATUS REGISTER AND COUNTER DESCRIPTIONS
The following descriptions pertain to the status registers and counters assigned to Port n. The status registers
provide two readable bit positions per alarm. One bit (in an odd-numbered address) indicates the detected
alarm as unlatched. The second bit (in the preceding even-numbered address) provides the alarm status as an
latched alarm indication. A latched bit position is set on positive, negative, or both positive and negative transi-
tions of the alarm, or on a positive level of the alarm. A latched alarm is cleared on a microprocessor read cycle
of its address. During a read cycle for a counter, internal logic holds any increment to the counter until the read
cycle is complete, and then updates the counter afterwards.
0C0 Port 4
0C1 Port 4
030 Port 1
060 Port 2
090 Port 3
031 Port 1
061 Port 2
091 Port 3
Address
Address
0F5
Proprietary TranSwitch Corporation Information for use Solely by its Customers.
6-0
Bit
7
7-0
Bit
7
6
5
4
3
2
TxB2DIS
Symbol
Unused
Symbol
Latched
AnRDIS
AnSIZE
AnNDF
AnLOP
Alarms
AnAIS
AnRFI
An
Transmit BIP-2 Disable (Test Bit): A 0 is used for normal operation and
will allow the calculated N2 (Z6) BIP-2 and V5 BIP-2 values to be transmit-
ted. A 1 will disable N2 (Z6) BIP-2 calculation as well as V5 BIP-2 calcula-
tion for all 4 ports and output zeros in its place.
Unused: These bits must be written to 0.
Same alarms as the unlatched indications in the following address loca-
tions (7-0), except that these alarm states are latched.
A Drop Bus Port n TU/VT AIS Alarm: A 1 indicates that an AIS has
been detected in the V1/V2 pointer bytes for the TU/VT selected.
A Drop Bus Port n Loss Of TU/VT Pointer Alarm: A 1 indicates that a
loss of pointer has been detected in the V1/V2 pointer bytes for the
TU/VT selected.
A Drop Bus Port n TU/VT Pointer Size Error Indication: A 1 indicates
that the receive size indicator in the pointer (Bits 5 and 6 in the V1
pointer byte) is not 10 for the TU/VT selected. The detection and recov-
ery time is immediate.
A Drop Bus Port n New Data Flag Indication: A 1 indicates that a New
Data Flag (1001 or 0001/1101/1011/1000) has been detected in the V1
pointer byte for the TU/VT selected (i.e., bits 1-4 in the V1 byte are the
inverse of the normal 0110 pattern or differ in only one bit, with a correct
size indicator and a valid pointer value).
A Drop Bus Port n Remote Server Defect Indication: A 1 indicates
that either a remote server defect alarm has been detected (bits 5, 6 and
7 in K4 (Z7) byte are equal to 101), or an RDI has been detected coming
from older equipment (bit 8 in V5 byte equals 1 when bits 6 and 7 in K4
(Z7) byte are equal to 00 or 11). The number of consecutive events used
for detection and recovery is determined by control bit V5AL10.
A Drop Bus Port n Remote Failure Indication: A 1 indicates that bit 4
in the V5 byte is equal to 1 for the TU/VT selected. The detection and
recovery time is immediate.
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DATA SHEET
Description
Description
Ed. 3, December 2000
TXC-04252
TXC-04252-MB
QE1M