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XRT79L71IB Datasheet(PDF) 91 Page - Exar Corporation

Part # XRT79L71IB
Description  1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -
PDF  434 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT79L71IB Datasheet(HTML) 91 Page - Exar Corporation

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XRT79L71
82
REV. 1.0.0
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
Receive DS3 FEAC Register (Address = 0x1116)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
RxFEAC_Code[5:0]
Unused
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
0
1
1
1
1
1
1
0
BIT NUMBER
NAME
TYPE
DESCRIPTION
7
Unused
R/O
6 - 1
RxFEAC_Code[5:0]
R/O
Receive FEAC Code Word:
These READ-ONLY bit-fields contain the value of the most
recently validated FEAC Code word.
NOTE: These bit-fields are only active if the XRT79L71 has been
configured to operate in the DS3, C-bit Parity Framing
format.
0
Unused
R/O
Receive DS3 FEAC Interrupt Enable/Status Register (Address = 0x1117)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
FEAC Valid
RxFEAC
Remove
Interrupt
Enable
RxFEAC
Remove
Interrupt
Status
RxFEAC
Valid Inter-
rupt
Enable
RxFEAC
Valid
Interrupt
Status
R/O
R/O
R/O
R/O
R/W
RUR
R/W
RUR
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
TYPE
DESCRIPTION
7 - 5
Unused
R/O
Please set to "0" (the default value) for normal operation.
4
FEAC Valid
R/O
FEAC Message Validation Indicator:
This READ-ONLY bit-field indicates that the FEAC Code (which
resides within the RxDS3 FEAC Register) has been validated by
the Receive FEAC Controller block. The Receive FEAC Control-
ler block will validate a FEAC codeword if it has received this
codeword in 8 out of the last 10 FEAC Messages. Polled sys-
tems can monitor this bit-field, when checking for a newly vali-
dated FEAC codeword.
0 - FEAC Message is not (or no longer) validated.
1 - FEAC Message has been validated.
NOTE: This bit-field is only active if the XRT79L71 has been
configured to operate in the DS3, C-bit Parity Framing
format.



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