82P2282PF IDT, Integrated Device Technology Inc, 82P2282PF Datasheet - Page 43
82P2282PF
Manufacturer Part Number
82P2282PF
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.82P2282PF.pdf
(381 pages)
Specifications of 82P2282PF
Screening Level
Industrial
Pin Count
100
Mounting
Surface Mount
Package Type
TQFP
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Lead Free Status / RoHS Status
Not Compliant
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IDT82P2282
3.8.2.1
3.8.2.1.1
pattern (as shown in Figure 12) meets the ITU-T Recommendation
G.706 4.1.2 and 4.2.
FAS sequence. If STEP 2 is not met, a new searching will start after the
following frame is skipped. If STEP 3 is not met, a new searching will
start immediately in the next frame. Once the Basic Frame alignment
pattern is detected in the received PCM data stream, the Basic Frame
synchronization is found and the OOFV bit will be set to ‘0’ for indication.
Functional Description
one frame,
The algorithm used to search for the E1 Basic Frame alignment
Generally, it is performed by detecting a successive FAS/NFAS/
No (skip
N=N+3)
Figure 12. Basic Frame Searching Process
2nd bit of TS0 of the (N+1) frame to ensure
Synchronization Searching
Basic Frame
that this is a non-frame alignment
the correct 7-bit FAS (X0011011)
Sequence (FAS) (X0011011)
STEP 2: Find logic 1 in the
for 7-bit Frame Alignment
Synchronization Found
in the TS0 in the (N+2)
Yes
STEP 3: Search for
sequence (NFAS)
STEP1: Search
in the N frame
Basic Frame
Yes
Yes
frame
th
th
th
No (N=N+1)
(N=N+3)
No
43
DUAL T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
August 20, 2009
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