XRT79L71 Datasheet, PDF (339/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
3
User Cell Filter # 3
Enable
2
Copy Cell Enable
1
Discard Cell Enable
TYPE
R/W
R/W
R/W
DESCRIPTION
User Cell Filter # 3 - Enable:
This READ/WRITE bit-field permits the user to either enable or
disable User Cell Filter # 3. If the user enables User Cell Filter #
3, then User Cell Filter # 3 will function per the configuration set-
tings in Bits 2 through 0, within this register.
If the user disables User Cell Filter # 3, then User Cell Filter # 3
then all cells that are applied to the input of User Cell Filter # 3
will pass through to the output of User Cell Filter # 3.
0 - Disables User Cell Filter # 3.
1 - Enables User Cell Filter # 3.
Copy Cell Enable - User Cell Filter # 3:This READ/WRITE bit-
field permits the user to either configure User Cell Filter # 3
(within the Receive ATM Cell Processor Block) to copy all cells
that have header byte patterns that comply with the "user-
defined" criteria, per User Cell Filter # 3, or to NOT copy any of
these cells.
If the user configures User Cell Filter # 3 to copy all cells comply-
ing with a certain "header-byte" pattern, then a copy (or repli-
cate) of this "compliant" ATM cell will be routed to the Receive
Cell Extraction Buffer.
If the user configures User Cell Filter # 3 to NOT copy all cells
complying with a certain "header-byte" pattern, then NO copies
(or replicates) of these "compliant" ATM cells will be made nor
will any be routed to the Receive Cell Extraction Buffer.
0 - Configures User Cell Filter # 3 to NOT copy any cells that
have header byte patterns which are compliant with the "user-
defined" filtering criteria.
1 - Configures User Cell Filter # 3 to copy any cells that have
header byte patterns that are compliant with the "user-defined"
filtering criteria, and to route these copies (of cells) to the
Receive Cell Extraction Buffer.
NOTE: This bit-field is only active if "User Cell Filter # 0" has
been enabled.
Discard Cell Enable - User Cell Filter # 3:This READ/WRITE bit-
field permits the user to either configure User Cell Filter # 3
(within the Receive ATM Cell Processor Block) to discard all cells
that have header byte patterns that comply with the "user-
defined" criteria, per User Cell Filter # 3, or NOT discard any of
these cells.
If the user configures User Cell Filter # 3 to NOT discarded any
cells that is compliant with a certain "header-byte" pattern, then
the cell will be retained for further processing.
0 - Configures User Cell Filter # 3 to NOT discard any cells that
have header byte patterns that are compliant with the "user-
defined" filtering criteria.
1 - Configures User Cell Filter # 3 to discard any cells that have
header byte patterns that are compliant with the "user-defined"
filtering criteria.
NOTE: This bit-field is only active if "User Cell Filter # 3" has
been enabled.
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