XRT79L71_1 Datasheet, PDF (91/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

REV. 1.0.0
XRT79L71
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
Unused
RxFEAC_Code[5:0]
R/O
R/O
R/O
R/O
R/O
0
1
1
1
1
BIT 2
R/O
1
BIT 1
R/O
1
BIT 0
Unused
R/O
0
BIT NUMBER
NAME
7
Unused
6-1
RxFEAC_Code[5:0]
0
Unused
TYPE
R/O
R/O
R/O
DESCRIPTION
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.
Receive DS3 FEAC Interrupt Enable/Status Register (Address = 0x1117)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
Unused
FEAC Valid
RxFEAC
Remove
Interrupt
Enable
RxFEAC
Remove
Interrupt
Status
R/O
R/O
R/O
R/O
R/W
RUR
0
0
0
0
0
0
BIT 1
RxFEAC
Valid Inter-
rupt
Enable
R/W
0
BIT 0
RxFEAC
Valid
Interrupt
Status
RUR
0
BIT NUMBER
NAME
7-5
Unused
4
FEAC Valid
TYPE
R/O
R/O
DESCRIPTION
Please set to "0" (the default value) for normal operation.
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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