peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 237

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

LLBDD…
LLBAD…
RSIF…
RS13…
RS15…
Data Sheet
This bit is set in case the LLB deactivate signal is detected and then
received over a period of more than 25 ms with a bit error rate less
than 1/100. The bit remains set as long as the bit error rate does not
exceed 1/100.
If framing is aligned, the timeslot 0 is not taken into account for the
error rate calculation.
Any change of this bit causes a LLBSC interrupt.
Depending on bit LCR1.EPRM the source of this status bit changed.
LCR1.EPRM=0: This bit is set in case the LLB activate signal is
detected and then received over a period of more than 25 ms with a
bit error rate less than 1/100. The bit remains set as long as the bit
error rate does not exceed 1/100.
If framing is aligned, the timeslot 0 is not taken into account for the
error rate calculation.
Any change of this bit causes a LLBSC interrupt.
PRBS Status
LCR1.EPRM=1: The current status of the PRBS synchronizer is
indicated in this bit. It is set high if the synchronous state is reached
even in the presence of a BER 1/10. A data stream containing all
zeros with/without framing bits is also a valid pseudo random bit
sequence. The same applies to an all ones data stream.
First bit in FAS-word. Used only in doubleframe format, otherwise
fixed to ‘1’.
Receive Spare Bit (Frame 13, CRC Multiframe)
First bit in service word of frame 13. Significant only in CRC-
multiframe format, otherwise fixed to ‘0’. This bit is updated with
beginning of every received CRC multiframe.
Receive Spare Bit (Frame 15, CRC Multiframe)
First bit in service word of frame 15. Significant only in CRC-
multiframe format, otherwise fixed to ‘0’. This bit is updated with
beginning of every received CRC multiframe.
Line Loop Back Deactivation Signal Detected
Line Loop Back Activation Signal Detected
Receive Spare Bit for International Use (FAS Word)
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FALC-LH V1.3
E1 Registers
PEB 2255
2000-07