PEB2256HT datasheet(192/490 Pages) INFINEON

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FALC56 V1.2

PEB 2256

Operational Description E1

Data Sheet

192

2002-08-27

helps to reduce the software load. They are very helpful especially to meet requirements

as specified in ETS300 011.

Table 49

Framer Initialization (E1)

XSP.AXS = 1

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.

XSP.EBP = 1

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.

FMR2.AXRA = 1

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.

FMR2.FRS(2:1) =

FMR1.AFR = 1

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.

FMR2.ALMF = 1

The receiver initiates a new basic- and multiframing research if

more than 914 CRC4 errors have been detected in one second.

FMR2.FRS1/0 = 11 In the interworking mode the FALC56 stays in double framing

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.

Table 50

HDLC Controller Initialization (E1)

MODE = 88

MODE2= 88

MODE3= 88

HDLC channel 1 receiver active, no address comparison.

HDLC channel 2 receiver active, no address comparison.

CCR1 = 18

CCR3= 08

CCR4= 08

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).

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