PEB2254H-V14 Infineon Technologies, PEB2254H-V14 Datasheet - Page 195

• Manufacturer Part Number: PEB2254H-V14
• Manufacturer: Infineon Technologies

Specifications of PEB2254H-V14

• Operating Supply Voltage (typ): 5V
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

5.1.4.2 12-Frame Multiframe
Normally, this kind of multiframe structure only makes sense when using the
CAS Robbed Bit Signaling. In addition, CCS and CAS-CC are also allowed. The
multiframe alignment signal is located at the FS-bit position of every other frame (refer to
table 19).
There are two possibilities of remote alarm (yellow alarm) indication:
• Bit 2 = 0 in each channel of a frame, selected with bit FMR0.SRAF = 0
• The last bit of the multiframe alignment signal (bit 1 of frame 12) changes from ‘0’ to
Synchronization Procedure
In the synchronous state terminal framing (FT bits) and multiframing (FS bits) are
observed, independently. Further reaction on framing errors depends on the selected
sync/resync procedure (via bit FMR2.SSP):
• FMR2.SSP = ‘0’: terminal frame and multiframe synchronization are combined.
• FMR2.SSP = ‘1’: terminal frame and multiframe synchronization are separated
Semiconductor Group
‘1’, selected with bit FMR0.SRAF = 1.
Two errors within 4/5/6 framing bits (via bits FMR4.SSC1/0) of one of the above will
lead to the asynchronous state for terminal framing and multiframing. Additionally to
the bit FRS0.LFA, loss of multiframe alignment is reported via bit FRS0.LMFA.
The resynchronization procedure starts with synchronizing upon the terminal framing.
If the pulseframing has been regained, the search for multiframe alignment is initiated.
Multiframe synchronization has been regained after two consecutive correct
multiframe patterns have been received.
Two errors within 4/5/6 terminal framing bits will lead to the same reaction as
described above for the “combined” mode.
Two errors within 4/5/6 multiframing bits will lead to the asynchronous state only for
the multiframing. Loss of multiframe alignment is reported via 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.
General Functions and Device Architecture T1
195
PEB 2254
11.96