peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 354

• Manufacturer Part Number: peb3456
• Description: Channelized T3 Termination With Ds3 Framer, M13 Multiplexer, T1/ E1 Framers And 256 Channel Hdlc/ppp Controller
• Manufacturer: Infineon Technologies Corporation

LFA
RRA
LMFA
FSRF
AIS
Data Sheet
Alarm Indication Signal (AIS)
This bit is set, when the alarm indication condition defined by bit
RFMR.AIS3 has been detected. The flag stays active for at least one
multiframe. It will be reset with the beginning of the next following
multiframe, if no alarm condition is detected.
Loss of Frame Alignment
T1
This bit is set, when the ’Loss of Frame Alignment’ condition defined by
bits RFMR.SSP and RFMR.SSC has been detected. The flag is cleared,
when synchronization has been regained.
E1
This bit is set, when the ’Loss of Frame Alignment’ condition defined by
bit RFMR.SSC has been detected. The flag is cleared, when
synchronization has been regained.
Received Remote Alarm (Yellow Alarm)
Condition for receive remote alarm is defined by bit FMR.RRAM. The
flag is set after detecting remote alarm (yellow alarm).
Loss of Multiframe Alignment
T1: F12
This bit is set, when the condition for ’Loss of Multiframe Alignment’
defined by bit RFMR.SSC has been detected. The flag is cleared after
multiframe synchronization has been regained.
E1: CRC-4 Multiframe, CRC-4 Interworking
This bit is set in CRC-4 multiframe or CRC-4 interworking mode, when
double frame alignment is lost. This bit is reset, when the multiframe
pattern is acquired or after 400 milliseconds in CRC-4 interworking
mode, when NMF is asserted.
Frame Search Restart Flag
This bit toggles on each new pulse frame search started. This function
can be used to recognize multiple candidates. If FSRF does not toggle,
but LFA and LMFA remain active, the synchronizer has multiple
candidates and cannot determine which one is correct.
Note: This flag can not be used to generate an interrupt vector.
354
Register Description
PEB 3456 E
05.2001