PEF2256EV22NP Lantiq, PEF2256EV22NP Datasheet - Page 100

• Manufacturer Part Number: PEF2256EV22NP
• Manufacturer: Lantiq

Specifications of PEF2256EV22NP

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Note: E-bits can be processed by the system interface. Setting bit TSWM.TSIS enables
Figure 26
Data Sheet
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 ?
CRC-4
OUT of Primary BFA:
IN Primary BFA:
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)
< 915
Yes
_
No
CRC-4 MFA Search
Start 8 ms Timer
MFA be found
No
BFA Search ?
Can CRC-4
in 8 ms ?
Primary
Yes
100
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
21).
Rev. 1.1, 2005-06-13
PEF 2256 H/E
FALC
ITD10310
®
56