PEF2256EV22NP Lantiq, PEF2256EV22NP Datasheet - Page 247

• 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

ALM
FRS
SIM
Data Sheet
Alarm Mode
Selects the AIS alarm detection mode.
0 =
1 =
Force Resynchronization
A transition from low to high initiates a resynchronization procedure
of the pulse frame and the CRC-multiframe (if enabled by bit
FMR2.RFS1) starting directly after the old framing candidate.
Alarm Simulation
0 =
1 =
SIM has to be held stable at high or low level for at least one receive
clock period before changing it again.
The AIS alarm is detected according to ETS300233.
Detection: An AIS alarm is detected if the incoming data stream
contains less than 3 zeros within a period of 512 bits and a loss
of frame alignment is indicated.
Recovery: The alarm is cleared if 3 or more zeros within 512
bits are detected or the FAS word is found.
The AIS alarm is detected according to ITU-T G.775
Detection: An AIS alarm is detected if the incoming data stream
contains less than 3 zeros in each doubleframe period of two
consecutive doubleframe periods (1024 bits).
Recovery: The alarm is cleared if 3 or more zeros are detected
within two consecutive doubleframe periods.
Normal operation.
Initiates internal error simulation of AIS, loss-of-signal, loss of
synchronization, remote alarm, slip, framing errors, CRC
errors, and code violations. The error counters FEC, CVC,
CEC1 are incremented.
247
Rev. 1.1, 2005-06-13
PEF 2256 H/E
E1 Registers
FALC
®
56