pef22504 Infineon Technologies Corporation, pef22504 Datasheet - Page 82

• Manufacturer Part Number: pef22504
• Description: Quad E1/t1/j1 Line Interface Component For Long- And Short-haul Applications Pef 22504 E, Pef 22504 Ht, Version 2.1
• Manufacturer: Infineon Technologies Corporation

Figure 21
Independent from the setting of BFR.BPV all BPVs will be detected
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For BFR.BPV = ´1´ and execution of the sequence described below, variable or fixed patterns with at least two
consecutive ´1´ pulses will show reduced BPVs. Reduction of BPVs depends on densitiy of ´1´ pulses. As ´1´ pulse
density increases, BPV rate decrease until the limiting case of “all-one”. In framed “all-one” pattern no BPVs will
be detected, except a BPV following a frameing bit that is ´0´.
For BFR.BPV = ´0´ variable or fixed patterns with at maximum two consecutive ´1´ pulses will show no reduced
BPVs.
Sequence
If the register bit BFR.BPV is set to ´0´, additionally the global registers
the following sequence to configure the best performance of the Bipolar Violation detection for all four channels:
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Data Sheet
In patterns with alternate ´1´ and ´0´ (50 % ´1´ density)
In all fixed patterns with no consecutive ´1´ (less than 50 % ´1´ density)
Write ´2C
Write ´FF
Write ´AC
Write ´2B
Write ´00
Write ´AB
Write ´2A
Write ´FF
Write ´AA
Write ´29
Write ´FF
Write ´A9
Write ´28
Write ´00
Write ´A8
Write ´27
Write ´FF
BFR.BPV
BFR.BPV
H
H
H
H
H
Behaviour of Bipolar Violation Detection
H
H
H
H
H
H
H
H
BFR.BPV
BFR.BPV
H
H
H
H
BPV for
BPV for
´ into REGFD
´ into REGFP
´ into REGFP
´ into REGFD
´ into REGFP
´ into REGFD
´ into REGFP
´ into REGFP
´ into REGFD
´ into REGFD
´ into REGFP
´ into REGFP
´ into REGFD
RL1
RL2
´ into REGFP
´ into REGFP
´ into REGFP
Internal Signals:
´ into REGFP
= ´1´
= ´0´
N for
= ´1´
N for
= ´0´
P
0
+1
0 -1
0 +1 -1 +1 0 +1 0 -1 +1 -1 -1
BPV always
detected
82
BPV detected if
BFR.BPV = ´0´
REGFP
BPV detected if
BFR.BPV = ´0´
Data bits set to ´0´,
BPV not detected
0 +1
and
-1
REGFD
-1
Functional Description
-1
BPV not
detected
Rev. 1.3, 2006-01-25
must be written with
BPV
QuadLIU
PEF 22504
TM