82P2281PFG8 IDT, Integrated Device Technology Inc, 82P2281PFG8 Datasheet - Page 41
82P2281PFG8
Manufacturer Part Number
82P2281PFG8
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.82P2281PFG8.pdf
(371 pages)
Specifications of 82P2281PFG8
Number Of Transceivers
1
Screening Level
Industrial
Mounting
Surface Mount
Package Type
TQFP
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Lead Free Status / RoHS Status
Compliant
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IDT82P2281
Functional Description
errors in
second
> 914
CRC
one
alignment pattern if CRCEN =
1 (refer to CRC Multi-Frame)
search for CRC Multi-Frame
alignment patterns within 8ms, with the
interval time of each pattern being a
OOCMFV = 0, OOFV = 0 CRC
find 2 CRC Multi-Frame
acquired; Start CRC and
CRC Multi-Frame sync.
to CRC interworking
E-bits processing;
multiple of 2ms
Start 8ms and
search for Basic Fframe alignment pattern
400ms timer
Yes
(refer to Basic Frame)
Figure 11. E1 Frame Searching Process
No, and
No, and
Basic Frame sync. acquired
expired
expired
OOSMFV = 1, OOOFV = 0
OOFV = 1, OOCMFV = 1,
Start to check FAS errors
8ms
8ms
Yes
Yes
Yes
(N+1) frame
alignment patterns within 8ms, with the
find NFAS in
Out of sync.
(N+2) frame
OOFV = 0
interval time of each pattern being a
find FAS in
find FAS in
N frame
th
Basic Frame sync. acquired
th
th
41
Lock the Sync. Position
Yes
find 2 CRC Multi-Frame
search OOOFV = 1
Start Offline Frame
Yes
Yes
Yes
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
Start 8ms timer
multiple of 2ms
(n+2) frame
(n+1) frame
OOOFV = 0
No (N=N+1)
find NFAS in
frame, N=N+3)
No (N=N+3)
find FAS in
find FAS in
No (skip one
n frame
th
th
th
No (n = n+1)
frame, n=n+3)
No (skip one
No (n=n+3)
search for Signaling Multi-Frame
alignment if CASEN = 1 (refer to
Signaling Multi-Frame)
errors (criteria selected by the
BIT2C) or manually re-frame
3 consecutive FAS or NFAS
basic frame sync.
No, and 400ms
expired with
Sync conditions which criteria
of Signaling Multi-Frame
are set in the SMFASC
Multi-Frame alignment
Multi-Frame sync.
No
No
check for out
Stop CRC processing if
find Signaling
& TS16C
Signaling
acquired
CRC to non-CRC
pattern
C2NCIWCK = 0
C2NCIWV = 1
interworking
Yes
Yes
August 20, 2009
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