PEB2256HT datasheet(150/490 Pages) INFINEON

150 / 490 page

FALC56 V1.2

PEB 2256

Functional Description T1/J1

Data Sheet

150

2002-08-27

5.3

Additional Receive Framer Functions (T1/J1)

5.3.1

Error Performance Monitoring and Alarm Handling

• Alarm Indication Signal: Detection and recovery is flagged by bit FRS0.AIS and

ISR2.AIS. Transmission is enabled by bit FMR1.XAIS.

• Loss-Of-Signal: Detection and recovery is flagged by bit FRS0.LOS and ISR2.LOS.

• Remote Alarm Indication: Detection and release is flagged by bit FRS0.RRA and

ISR2.RA/RAR. Transmission is enabled by bit FMR4.XRA.

• Excessive Zeros: Detection is flagged by bit FRS1.EXZD.

• Pulse-Density Violation: Detection is flagged by bit FRS1.PDEN and ISR0.PDEN.

• Transmit Line Shorted: Detection and release is flagged by bit FRS1.XLS and

ISR1.XLSC.

• Transmit Ones-Density: Detection and release is flagged by bit FRS1.XLO and

ISR1.XLSC.

Table 38

Summary of Alarm Detection and Release (T1/J1)

Alarm

Detection Condition

Clear Condition

Red Alarm or

Loss-Of-Signal

(LOS)

no transitions (logical zeros) in a

programmable time interval of 16

to 4096 consecutive pulse

periods. Programmable receive

input signal threshold

programmable number of ones

(1 to 256) in a programmable

time interval of 16 to 4096

consecutive pulse periods. A one

is a signal with a level above the

programmed threshold.

the pulse-density is fulfilled and

no more than 15 contiguous

zeros during the recovery

interval are detected.

Blue Alarm or

Alarm Indication

Signal (AIS)

FMR4.AIS3 = 0:

less than 3 zeros in 12 frames or

24 frames (ESF),

FMR4.AIS3 = 1:

less than 4 zeros in 12 frames or

less than 6 zeros in 24 frames

(ESF)

active for at least one multiframe.

FMR4.AIS3 = 0:

more than 2 zeros in 12 or 24

frames (ESF),

FMR4.AIS3 = 1:

more than 3 zeros in 12 frames

or more than 5 zeros in 24

frames (ESF)

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