peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 165

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

T1/J1 Initialization
For a correct start up of the Primary Access Interface a set of parameters specific to the
system and hardware environment must be programmed after pin RES goes inactive
(low). Both the basic and the operational parameters must be programmed before the
activation procedure of the PCM line starts. Such procedures are specified in ITU-T
recommendations (e.g. fault conditions and consequent actions). Setting optional
parameters primarily makes sense when basic operation via the PCM line is guaranteed.
Table 46
control bits which are to be programmed in one of the above steps. The sequence is
recommended but not mandatory. Accordingly, parameters for the basic and operational
set up, for example, may be programmed simultaneously. The bit FMR1.PMOD must
always be kept high (otherwise E1 mode is selected).
Features like channel loop back, idle channel activation, clear channel activation,
extensions for signaling support, alarm simulation,
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.
Table 46
Basic Set Up
Mode Select
Specification of Line interface and clock
generation
Line interface coding
Loss of Signal detection/recovery
conditions
System interface mode
Channel translation mode
Transmit offset counters
Receive offset counters
AIS to system interface
Operational Set Up
Select framing
Framing additions
Synchronization mode
Signaling mode
Data Sheet
gives an overview of the most important parameters in terms of signals and
Initialization Parameters (T1/J1)
165
T1/J1
FMR1.PMOD = 1
LIM0, LIM1, XPM2-0
FMR0.XC1/0, FMR0.RC1/0
PCD, PCR, LIM1, LIM2
FMR1.IMOD
FMR1.CTM
XC0.XCO, XC1.XTO
RC0.RCO, RC1.RTO
FMR2.DAIS/SAIS
T1/J1
FMR4.FM1/0
FMR1.CRC, FMR0.SRAF
FMR4.AUTO, FMR4.SSC1/0,
FMR2.MCSP, FMR2.SSP
FMR1.SIGM, FMR5.EIBR, XC0.BRM,
MODE, CCR1, CCR3, RAH1/2, RAL1/2
Operational Description T1/J1
may be activated later.
FALC-LH V1.3
PEB 2255
2000-07