PEB2256HT datasheet(147/490 Pages) INFINEON

147 / 490 page

FALC56 V1.2

PEB 2256

Functional Description T1/J1

Data Sheet

147

2002-08-27

Remote alarm (yellow alarm) is indicated by setting bit 2 to zero in each time slot. An

additional use of the D-bits for alarm indication is user defined and must be done

externally.

5.2.7.1

Synchronization Procedure

In the synchronous state terminal framing (FT-bits) and multiframing (FS-bits of the

framing header) are observed independently. Further reaction on framing errors

depends on the selected synchronization/resynchronization procedure (by bit

FMR2.SSP):

• FMR2.SSP = 0: terminal frame and multiframe synchronization are combined

Two errors within 4/5/6 framing bits (by bits FMR4.SSC1/0) of one of the above lead

to the asynchronous state for terminal framing and multiframing. Additionally to The

resynchronization procedure starts with synchronizing upon the terminal framing. If

the pulse framing has been regained, the search for multiframe alignment is initiated.

Multiframe synchronization has been regained after two consecutive correct

multiframe patterns have been received.

• FMR2.SSP = 1: terminal frame and multiframe synchronization are separated

Two errors within 4/5/6 terminal framing bits lead to the same reaction as described

above for the “combined” mode.

Two errors within 4/5/6 multiframing bits lead to the asynchronous state only for the

multiframing. Loss of multiframe alignment is reported by bit FRS0.LMFA. The state

of terminal framing is not influenced.

Now, the resynchronization procedure includes only the search for multiframe

alignment. Multiframe synchronization has been regained after two consecutive

correct multiframe patterns have been received.

PEB2256HT Datasheet(PDF) 147 Page - Infineon Technologies AG