peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 188
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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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6
6.1
The FALC56 can be operated in two modes, which are either E1 mode or T1/J1 mode.
The device is programmable via a microprocessor interface which enables byte or word
access to all control and status registers.
After reset the FALC56 must be initialized first. General guidelines for initialization are
described in
The status registers are read-only and are updated continuously. Normally, the
processor reads the status registers periodically to analyze the alarm status and
signaling data.
6.2
The FALC56 is forced to the reset state if a low signal is input on pin RES for a minimum
period of 10 µs. During reset the FALC56 needs an active clock on pin MCLK. All output
stages are in a high-impedance state, all internal flip-flops are reset and most of the
control registers are initialized with default values.
SIgnals (for example RL1/2 receive line) should not be applied before the device is
powered up.
After reset the device is initialized to E1 operation.
6.3
After reset, the FALC56 is initialized for doubleframe format with register values listed in
the following table.
Table 46
Register
FMR0
FMR1
FMR2
SIC1
SIC2,
SIC3
Data Sheet
Operational Description E1
Operational Overview E1
Device Reset E1
Device Initialization in E1 Mode
Chapter
Reset Value Meaning
00
00
00
00
00
Initial Values after Reset (E1)
H
H
H
H
H
6.3.
NRZ Coding, no alarm simulation.
E1-doubleframe format, 2 Mbit/s system data rate, no AIS
transmission to remote end or system interface, payload
loop off.
8.192 MHz system clocking rate, receive buffer 2 frames,
transmit buffer bypass, data sampled or transmitted on the
falling edge of SCLKR/X, automatic freeze signaling, data
is active in the first channel phase
188
Operational Description E1
FALC56 V1.2
PEB 2256
2002-08-27
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