PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 298

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

XAIS…
Framer Mode Register 2 (Read/Write)
Value after RESET: 00
FMR2
MCSP…
SSP…
Semiconductor Group
7
Transmit AIS Towards Remote End
Sends AIS (blue alarm) via ports: XL1, XL2 towards the remote end.
If Local Loop Mode is enabled the transmitted data is looped back to
the system internal highway without any changes.
Multiple Candidates Synchronization Procedure
Select Sync/Resync Procedure
Together with bit FMR2.SSP the synchronization mode of the receive
framer is defined:
MCSP/SSP:
00… F12/72 format:
01… F12/72:
10…
MCSP
H
Specified number of errors in both FT framing and FS framing
lead to loss of sync (FRS0.LFA is set). In the case of FS bit
framing errors, bit FRS0.LMFA is set additionally. A complete
new synchronization procedure is initiated to regain pulseframe
alignment and then multiframe alignment.
F24:
normal operation: synchronization is achieved only on
verification the framing pattern.
Specified number of errors in FT framing has the same effect
as above. Specified number of errors in FS framing only
initiates a new search for multiframe alignment without
influencing pulseframe synchronous state (FRS0.LMFA is set).
F24:
Synchronous state is reached when three consecutive
multiframe pattern are correctly found independent of the
occurence of CRC6 errors.
A one will enable a synchronization mode which is able to
choose multiple framing pattern candidates step by step. I.e. if
in synchronous state the CRC error counter indicates that the
SSP
DAIS
298
SAIS
Operational Description T1 / J1
PLB
AXRA
0
EXZE
PEB 22554
(x1E)
09.98