PEF22558EV11GXP Lantiq, PEF22558EV11GXP Datasheet - Page 54

• Manufacturer Part Number: PEF22558EV11GXP
• Manufacturer: Lantiq

Specifications of PEF22558EV11GXP

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

to´11b´. Note that this mode can be used also in E1 mode, but makes no sense: In E1
CAS disturbance can be avoided by deselection of the appropriate time slot 16.
Note that the “N
frame bit in TS0 is identical to the “robbed” CAS bit.
Note that for “N
bits in the frame are used for PRBS (that is an “unframed” mode).
The kind of PRBS patterns (polynoms) can be selected to be 2
by the register bits TPC0.PRP(1:0) and LCR1.LLBP, see
polynoms see the Standards ITU-T O.150, O.151. and TR62441. New against
FALC56v2.1 are the patterns 2
not ´00b´.
The transmit of PRBS pattern is enabled by register bit LCR1.XPRBS. With the register
bit LCR1.FLLB switching between not inverted and inverted transmit pattern can be
done.
The receive monitoring of PRBS patterns is enabled by register bit LCR1.EPRM. In
general, dependend on bit LCR1.EPRM the source of the interrupt status bit
ISR1.LLBSC changed, see register description. The kind of detected PRBS pattern in
the receiver is shown in the status register bits PRBSSTA.PRS. Every change of the bits
PRS in PRBSSTA sets the interrupt bit ISR1.LLBSC if register bit LCR1.EPRM is set. No
pattern is also detected if signal “alarm simulation” is active.
The detection of all_zero or all_ones is done over 12, 16, 21 or 24 consecutive bits,
dependent on the choosed PRBS polynom (11, 15, 20 or 23). The detection of all_zero
or all_ones is independent on LCR1.FLLB. Note that if the information about the first
reached PRBS status after the monitor was enabled (“PRBS pattern detected” or
“inverted PRBS pattern detected”) is combined with the status information “all-zero
pattern detected” or “all-ones pattern detected”, the controller can conclude the real
polarity of the all-ones or all-zeros pattern.
Because every bit error in the PRBSequence increments the bit error counter BEC, no
special status information like “PRBS detected with errors” is given here.
Table 21
TPC0.PRP
00
01
10
11
Delta Sheet
Supported PRBS Polynomials (pattern)
TPC0.PRM
01 or 11
01 or 11
01 or 11
01 or 11
64 kbit/s” selection and selection af all time slots by PRBSTS(1:4) all
56 kbit/s” mode is automatically a “framed” mode in T1 because the
11
LCR1.LLBP
x
x
x
x
-1 and 2
23
54
-1 which can be selected only if TPC0.PRM
Kind of
polynomial
2
2
2
2
11
15
20
23
-1
-1
-1
-1
Table
11
Test and Maintenance
22. For definition of this
-1, 2
Comment
Rev. 2.0, 2005-05-03
15
-1, 2
OctalFALC
PEF 22558 E
20
-1or 2
23
TM
-1