82P2284BB IDT, Integrated Device Technology Inc, 82P2284BB Datasheet - Page 43

• Manufacturer Part Number: 82P2284BB
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2284BB

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

Functional Description
IDT82P2284
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
acquired; Start CRC and
find 2 CRC Multi-Frame
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
alignment patterns within 8ms, with the
(N+1) frame
find NFAS in
(N+2) frame
Out of sync.
interval time of each pattern being a
find FAS in
find FAS in
OOFV = 0
N frame
th
Basic Frame sync. acquired
th
th
Lock the Sync. Position
find 2 CRC Multi-Frame
Yes
43
search OOOFV = 1
Start Offline Frame
Yes
Yes
Yes
Start 8ms timer
multiple of 2ms
(n+2) frame
QUAD T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
No (N=N+1)
find NFAS in
(n+1) frame
OOOFV = 0
No (N=N+3)
frame, 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
Stop CRC processing if
find Signaling
check for out
Signaling
& TS16C
acquired
CRC to non-CRC
pattern
C2NCIWCK = 0
C2NCIWV = 1
interworking
Yes
Yes
February 25, 2008