PEB22504 Datasheet, PDF (90/128 Pages) Infineon Technologies AG – Quad Line Interface Unit for E1⁄T1⁄J1 QuadLIU

PDEN
EXZD
RLS
PRBSS
PEB 22504
QuadLIU V1.1
Register Description
T1/J1 mode:
This bit is set when fewer than six zeros are detected within a time
interval of 3 ms received on RL1/2.
The bit is also set during alarm simulation, and reset if LIM0.SIM is
cleared and no alarm condition exists.
An interrupt status bit (ISR0.AIS) is set with the rising edge of this bit.
Pulse-Density Violation
This bit indicates that the pulse-density of the received data stream
defined by ANSI T1.403 is violated. More than 15 consectuive zeros
or fewer than N ones are detected in each time window of 8 × (N+1)
digit time slots with N taking on all values of 1 to 23.
The bit is cleared if the pulse-density fulfills the above requirement
within 23 received ones or automatically after a read access.
The bit is also set during alarm simulation.
Exzessive Zeros Detected
Significant only if exzessive zero detection is enabled by setting
LIM0.EXZE = 1. Detection is done according to ANSI T1.231
requirements.
The bit is set after detection of more than three (HDB3;E1), seven
(B8ZS ;T1/J1) or 15 (AMI;T1/J1) contiguous zeros in the received bit
stream. This bit is cleared when read.
Remote Loop Status
Any change of this bit causes an ISR0.LLBSC interrupt.
0 = The remote loop is inactive. If enabled by bit LIM0.ARL, the
remote loop is switched off automatically upon detection of the
in-band loop deactivate code for at least 5 s, according to
ANSI T1. 403 requirements.
1 = The remote loop is active (closed). If enabled by bit LIM0.ARL,
the remote loop is switched on automatically upon detection of
the in-band loop activate code for at least 5 s.
Pseudo-Random Binary Sequence Status
The current status of the PRBS synchronizer is indicated in this bit. It
is set if the synchronous state is reached, even in the presence of a
bit error rate less than or equal to 10^-1. A data stream containing all
zeros with or without framing bits is also a valid pseudo-random bit
sequence. The bit is also set during alarm simulation.
Data Sheet
90
2001-02