peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 192
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peb2256
Manufacturer Part Number
peb2256
Description
E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB2256.pdf
(490 pages)
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helps to reduce the software load. They are very helpful especially to meet requirements
as specified in ETS300 011.
Table 49
XSP.AXS = 1
XSP.EBP = 1
FMR2.AXRA = 1
FMR2.FRS(2:1) =
10
FMR1.AFR = 1
FMR2.ALMF = 1
FMR2.FRS1/0 = 11 In the interworking mode the FALC56 stays in double framing
Table 50
MODE = 88
MODE2= 88
MODE3= 88
CCR1 = 18
CCR3= 08
CCR4= 08
Data Sheet
H
H
H
H
H
H
Framer Initialization (E1)
HDLC Controller Initialization (E1)
ETS300 011 C4.x for instance requires the sending of E-Bits in
TS0 if CRC4 errors have been detected. By programming
XSP.AXS = 1 the submultiframe status is inserted automatically in
the next outgoing multiframe.
If the FALC56 has reached asynchronous state the E-Bit is
cleared if XSP.EBP = 0 and set if XSP.EBP = 1. ETS300 011
requires that the E-Bit is set in asynchronous state.
The transmission of RAI via the line interface is done automatically
by the FALC56 in case of loss of frame alignment (FRS0.LFA = 1).
If basic framing has been reinstalled RAI is automatically reset.
In this mode a search of double framing is automatically restarted,
if no CRC4 multiframing is found within 8ms. Together with
FMR2.AXRA = 1 this mode is essential to meet ETS300 011 and
reduces the processor load heavily.
The receiver initiates a new basic- and multiframing research if
more than 914 CRC4 errors have been detected in one second.
format if no multiframe pattern is found in a time interval of 400 ms.
This is also indicated by a 400 ms interrupt. Additionally the
extended interworking mode (FMR3.EXTIW = 1) will activate after
400 ms the remote alarm (FMR2.AXRA = 1) and will still search
the multiframing without switching completely to the double
framing. A complete resynchronization in an 8 ms interval is not
initiated.
HDLC channel 1 receiver active, no address comparison.
HDLC channel 2 receiver active, no address comparison.
HDLC channel 2 receiver active, no address comparison.
Enable signaling via TS(31:0), interframe time fill with continuous
flags (channel 1).
Interframe time fill with continuous flags (channel 2).
Interframe time fill with continuous flags (channel 3).
192
Operational Description E1
FALC56 V1.2
PEB 2256
2002-08-27
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