PEB2256H-V12 Infineon Technologies, PEB2256H-V12 Datasheet - Page 153
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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
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PEB2256H-V12
Manufacturer:
Infineon Technologies
Quantity:
10 000
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5.3.6
For support of common T1 applications, clear channels can be specified through the 3-
byte register bank CCB(1:3). In this mode the contents of selected transmit time slots are
not overwritten by internally or externally sourced bit-robbing and zero code suppression
(B7 stuffing) information.
5.3.7
The FALC56 generates and detects a framed or unframed in-band loop-up (activate,
00001) and loop-down (deactivate, 001) pattern according to ANSI T1.403 with bit error
rates as high as 10
Replacing the in-band loop codes with transmit data is done by FMR5.XLD/XLU.
The FALC56 also offers the ability generating and detecting of a flexible in-band loop-up
and -down pattern (LCR1.LLBP = 1). The loop-up and loop-down pattern is individually
programmable from 2 to 8 bits in length (LCR1.LAC1/0 and LCR1.LDC1/0).
Programming of loop codes is done in registers LCR2 and LCR3.
Status and interrupt status bits inform the user whether loop-up or loop-down code was
detected.
5.3.8
The transparent modes are useful for loop-backs or for routing data unchanged through
the FALC56.
In receive direction, transparency for ternary or dual-/single-rail unipolar data is always
achieved if the receiver is in the synchronous state. All bits in F-bit position of the
incoming multiframe are forwarded to RDO and inserted in the FS/DL time slot or in the
F-bit position. In asynchronous state the received data is switched through transparently
if bit FMR2.DAIS is set. Setting of bit LOOP.RTM disconnects control of the elastic buffer
from the receiver. The elastic buffer is now in a “free running” mode without any
possibility to update the time slot assignment to a new frame position in case of
resynchronization of the receiver. Together with FMR2.DAIS this function is used to
realize undisturbed transparent reception.
Setting bit FMR4.TM switches the FALC56 in transmit transparent mode:
In transmit direction bit 8 of the FS/DL time slot from the system highway (XDI) is inserted
in the F-bit position of the outgoing frame. For complete transparency the internal
signaling controller, idle code generation, AIS alarm generation, single channel and
payload loop-back has to be disabled and cleared channels have to be defined by
registers CCB1 3.
5.3.9
The FALC56 examines the receive data stream on the pulse-density requirement which
is defined by ANSI T1. 403. More than 14 consecutive zeros or less than N ones in each
Data Sheet
Clear Channel Capability
In-Band Loop Generation and Detection
Transparent Mode
Pulse-Density Detection
-2
. Framed or unframed in-band loop code is selected by LCR1.FLLB.
153
Functional Description T1/J1
FALC56 V1.2
PEB 2256
2002-08-27
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