PEB2256HT datasheet(191/490 Pages) INFINEON

191 / 490 page

FALC56 V1.2

PEB 2256

Operational Description E1

Data Sheet

191

2002-08-27

Features like channel loop-back, idle channel activation, extensions for signaling

support, alarm simulation, etc. are activated later. Transmission of alarms (e.g. AIS,

remote alarm) and control of synchronization in connection with consequent actions to

remote end and internal system depend on the activation procedure selected.

Note: Read access to unused register addresses: value should be ignored.

Write access to unused register addresses: should be avoided, or set to “00” hex.

All control registers (except XFIFO, XS(16:1), CMDR, DEC) are of type Read/

Write.

Specific E1 Register Settings

The following is a suggestion for a basic initialization to meet most of the E1

requirements. Depending on different applications and requirement any other

initialization can be used.

E1 Framer Initialization

The selection of the following modes during the basic initialization supports the ETSI

requirements for E-Bit Access, remote alarm and synchronization (please refer also to

FALC56 driver code of the evaluation system EASY22554 and application notes) and

Operational Set Up

Select framing

FMR2.RFS(1:0), FMR1.XFS

Framing additions

RC1.ASY4, RC1.SWD

Synchronization mode

FMR1.AFR, FMR2.ALMF

Signaling mode

XSP, XSW, FMR1.ENSA, XSA(8:4),

TSWM, MODE, CCR1, CCR2, RAH(2:1),

RAL(2:1)

Table 48

Line Interface Initialization (E1)

FMR0.XC0/

FMR0.RC0/

LIM1.DRS

FMR3.CMI

The FALC56 supports requirements for the analog line interface

as well as the digital line interface. For the analog line interface

the codes AMI and HDB3 are supported. For the digital line

interface modes (dual- or single-rail) the FALC56 supports AMI,

HDB3, CMI (with and without HDB3 precoding) and NRZ.

PCD = 0A

LOS detection after 176 consecutive “zeros” (fulfills G.775).

PCR = 15

LOS recovery after 22 “ones” in the PCD interval. (fulfills G.775).

LIM1.RIL(2:0) = 02

LOS threshold of 0.6 V (fulfills G.775).

Table 47

Initialization Parameters (E1) (cont’d)

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