
IDT82P2281
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
Functional Description
48
August 20, 2009
3.9
PERFORMANCE MONITOR
3.9.1
T1/J1 MODE
Several internal counters are used to count different events for per-
formance monitoring. For different framing format, the counters are used
differently. The overflow of each counter is reflected by an Overflow Indi-
cation Bit, and can trigger an interrupt if the corresponding Overflow
Interrupt Enable Bit is set. This is shown in
Table 22.The internal counters can be updated in two ways:
1. Auto-Update: Content in the internal counters is transferred to
indirect registers every one second automatically if the AUTOUPD bit is
‘1’;
2. Manual-Update: Content in the internal counters is transferred to
indirect registers when there is a transition from ‘0’ to ‘1’ on the UPDAT
bit, no matter whether the AUTOUPD bit is ‘1’ or ‘0’.
All the internal counters will be resetted after the update and will
start a new round of counting. No error event is lost during the update.
The indirect registers are addressed by the ADDR[3:0] bits. The
ADDR[3:0] bits select the specific PMON indirect register. Data read
from the indirect register is held in the DAT[7:0] bits.
Table 22: Monitored Events In T1/J1 Mode
Format
Event
Counter
Overflow Interrupt Indication Bit Overflow Interrupt Enable Bit
SF
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
LCV[15:0]
LCVOVI
LCVOVE
F Bit Error
FER[11:0]
FEROVI
FEROVE
The new-found F bit position differs from the previous one
COFA[2:0]
COFAOVI
COFAOVE
Out of SF synchronization
OOF[4:0]
OOFOVI
OOFOVE
PRGD Bit Error
PRGD[15:0]
PRGDOVI
PRGDOVE
ESF
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
LCV[15:0]
LCVOVI
LCVOVE
Frame Alignment Bit Error
FER[11:0]
FEROVI
FEROVE
CRC-6 Error
CRCE[9:0]
CRCOVI
CRCOVE
The new-found F bit position differs from the previous one
COFA[2:0]
COFAOVI
COFAOVE
Out of ESF synchronization
OOF[4:0]
OOFOVI
OOFOVE
PRGD Bit Error
PRGD[15:0]
PRGDOVI
PRGDOVE
T1 DM
(T1 only)
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
LCV[15:0]
LCVOVI
LCVOVE
F Bit Error
FER[11:0]
FEROVI
FEROVE
DDS Pattern Error
DDSE[9:0]
DDSOVI
DDSOVE
The new-found F bit position differs from the previous one
COFA[2:0]
COFAOVI
COFAOVE
Out of T1 DM synchronization
OOF[4:0]
OOFOVI
OOFOVE
PRGD Bit Error
PRGD[15:0]
PRGDOVI
PRGDOVE
SLC-96
(T1 only)
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
LCV[15:0]
LCVOVI
LCVOVE
F Bit Error
FER[11:0]
FEROVI
FEROVE
The new-found F bit position differs from the previous one
COFA[2:0]
COFAOVI
COFAOVE
Out of SLC-96 synchronization
OOF[4:0]
OOFOVI
OOFOVE
PRGD Bit Error
PRGD[15:0]
PRGDOVI
PRGDOVE