PEB2256HT datasheet(149/490 Pages) INFINEON

149 / 490 page

FALC56 V1.2

PEB 2256

Functional Description T1/J1

Data Sheet

149

2002-08-27

5.2.8

Summary of Frame Conditions (T1/J1)

Table 37

Summary Frame Recover/Out of Frame Conditions (T1/J1)

Format

Frame Recover Condition

Out of Frame Condition

only one FT pattern found, optional

forcing on next available FT framing

candidate

2 out of 4/5/6 incorrect FT-bits

F12 (D4)

and

F72 (SLC96)

FMR2.SSP = 0:

Combined FT + FS framing search:

First searching for FT pattern with

optional forcing on next available

framing candidates and then for 2

consecutive correct FS pattern

1).

FMR2.SSP = 1:

Separated FT + FS pattern search:

Loss of FT framing starts first

search for FT and then for 2

consecutive correct FS pattern

1).

Loss of FS framing starts only the

FS pattern

1) search.

In F12 (D4) format bit 1 in frame 12 is excluded from the synchronization process.

FMR2.SSP = 0: 2 out of 4/5/6

incorrect FT- or FS-bits

FMR2.SSP = 1:

2 out of 4/5/6 incorrect FT-bits

searched in FT and FS framing

bits,

2 out of 4/5/6 incorrect FS-bits

searched only the FS framing.

F24 (ESF)

FMR2.MCSP/SSP = 00:

only one FAS pattern found,

optional forcing on next available

FAS framing candidate with

discarding of all remaining framing

candidates.

FMR2.MCSP/SSP = 01:

3 consecutive correct multiframing

found independent of CRC6 errors.

FMR2.MCSP/SSP = 10:

choosing multiple framing pattern

step by step, optional forcing on

next available FAS framing pattern

with discarding only of the previous

assumed framing candidate.

FMR2.MCSP/SSP = 11:

FAS framing correctly found and

CRC6 check error free.

2 out of 4/5 incorrect FAS-bits

2 out of 6 incorrect FAS-bits per

multiframe

4 consecutive incorrect

multiframing pattern

more than 320 CRC6 errors per

second interval

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