pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 92
pef2256e
Manufacturer Part Number
pef2256e
Description
E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF2256E.pdf
(518 pages)
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Note: E-bits can be processed by the system interface. Setting bit TSWM.TSIS enables
Figure 25
User’s Manual
Hardware Description
transparency for E-bits in transmit direction (refer to
Assume CRC-4 to CRC-4 Interworking:
Confirm Primary BFA Associated with CRC-4 MFA
Adjust Primary BFA if Necessary
Reset Internal Multiframe Alignment Status
(FRS0.LMFA = 0)
Yes
Start CRC-4 Performance Monitoring
CRC4 Multiframe Alignment Recovery Algorithms (E1)
Error Count
or LFA ?
OUT of Primary BFA:
IN Primary BFA:
CRC-4
Inhibit Incoming CRC-4 Performance Monitoring
Reset all Timers
Set FRS0.LFA/LMFA/NMF = 110
Start 400 ms Timer
Enable Primary BFA Loss Checking Process
Reset Internal Frame Alignment Status
(FRS0.LFA = 0)
Yes
< 915
_
No
CRC-4 MFA Search
Start 8 ms Timer
MFA be found
No
BFA Search ?
Can CRC-4
in 8 ms ?
Primary
Yes
92
No
Assume CRC-4 to non CRC-4 Interworking:
Confirm Primary BFA
Set Internal 400 ms Timer Expiration Status Bit
(FRS0.NMF = 1)
Continue CRC-4 Performance Monitoring
No
Table
Functional Description E1
BFA Search
Elapsed ?
Parallel
Good ?
400 ms
Timer
Yes
No
Yes
19).
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
ITD10310
®
56
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