PEB2256H-V12 Infineon Technologies, PEB2256H-V12 Datasheet - Page 145
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PEB2256H-V12
Manufacturer Part Number
PEB2256H-V12
Description
IC INTERFACE LINE 3.3V 80-MQFP
Manufacturer
Infineon Technologies
Datasheet
1.PEB2256H-V12.pdf
(490 pages)
Specifications of PEB2256H-V12
Applications
*
Interface
*
Voltage - Supply
*
Package / Case
80-SQFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PEB2256H-V12
PEB2256H-V12IN
PEB2256H-V12IN
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PEB2256H-V12
Manufacturer:
Infineon Technologies
Quantity:
10 000
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5.2.6.1
For multiframe synchronization the FAS-bits are observed. Synchronous state is
reached if at least one framing candidate is definitely found, or the synchronizer is forced
to lock onto the next available candidate (FMR0.FRS).
In the synchronous state the framing bits (FAS-bits) are observed. The following
conditions selected by FMR4.SSC1/0 lead to the asynchronous state:
• two errors within 4/5/6 framing bits
• two or more erroneous framing bits within one ESF multiframe
• more than 320 CRC6 errors per second interval (FMR5.SSC2)
• 4 incorrect (1 out of 6) consecutive multiframes independent of CRC6 errors.
There are four multiframe synchronization modes selectable using FMR2.MCSP and
FMR2.SSP.
• FMR2.MCSP/SSP = 00: In the synchronous state, the setting of FMR0.FRS or
• FMR2.MCSP/SSP = 01: Synchronization is achieved when 3 consecutive multiframe
• FMR2.MCSP/SSP = 10: This mode has been added in order to be able to choose
• FMR2.MCSP/SSP = 11: Synchronization including automatic CRC6 checking
Data Sheet
FMR0.EXLS resets the synchronizer and initiates a new frame search. The
synchronous state is reached again, if there is only one definite framing candidate. In
the case of repeated apparent simulated candidates, the synchronizer remains in the
asynchronous state.
In asynchronous state, setting bit FMR0.FRS induces the synchronizer to lock onto
the next available framing candidate if there is one. At the same time the internal
framing pattern memory is cleared and other possible framing candidates are lost.
pattern are correctly found independent of the occurrence of CRC6 errors. If only one
or two consecutive multiframe pattern were detected the FALC56 stays in the
asynchronous state, searching for a possible additionally available framing pattern.
This procedure is repeated until the framer has found three consecutive multiframe
pattern in a row.
multiple framing pattern candidates step by step. I.e. if in synchronous state the CRC
error counter indicates that the synchronization might have been based on an alias
framing pattern, setting of FMR0.FRS leads to synchronization on the next candidate
available. However, only the previously assumed candidate is discarded in the internal
framing pattern memory. The latter procedure can be repeated until the framer has
locked on the right pattern (no extensive CRC errors).
The synchronizer is reset completely and initiates a new frame search, if there is no
multiframing found. In this case bit FRS0.FSRF toggles.
Synchronization is achieved when framing pattern are correctly found and the CRC6
checksum is received without an error. If the CRC6 check failed on the assumed
Synchronization Procedures
145
Functional Description T1/J1
FALC56 V1.2
PEB 2256
2002-08-27
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