pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 148

• Manufacturer Part Number: pef2256e
• Description: E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
• Manufacturer: Infineon Technologies Corporation

•
If multiple framing candidates exist in the received data, setting bit FMR2.AFRS enables
automatic search for the valid framing.
5.2.6
The use of the first bit of each frame for the multiframe alignment word, the data link bits,
and the CRC bits is shown in
Table 36
Multiframe
Frame Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
User’s Manual
Hardware Description
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.
Extended Superframe (F24 or ESF Format, T1/J1)
Extended Superframe Structure (F24, ESF; T1/J1)
Multiframe
Bit Number
0
193
386
579
772
965
1158
1351
1544
1737
1930
2123
2316
2509
Table 36
FAS
–
–
–
0
–
–
–
0
–
–
–
1
–
–
on page 148.
F-Bits
148
Assignments
DL
m
–
m
–
m
–
m
–
m
–
m
–
m
–
Functional Description T1/J1
CRC
–
e
–
–
–
e
–
–
–
e
–
–
–
e
1
2
3
4
DS1.1, 2003-10-23
PEF 2256 H/E
Signaling
Channel
Designation
A
B
FALC
®
56