XRT79L71 Datasheet, PDF (297/441 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
1
Discard Cell Enable
0
Filter if Pattern Match
TYPE
R/W
R/W
DESCRIPTION
Discard Cell Enable - Receive User Cell Filter # 0:
This READ/WRITE bit-field permits the user to either configure
Receive User Cell Filter # 0 (within the Receive ATM Cell Pro-
cessor Block) to discard all cells that have header byte patterns
that comply with the "user-defined" criteria, per Receive User
Cell Filter # 0, or NOT discard any of these cells.
If the user configures Receive User Cell Filter # 0 to NOT discard
any cells that is compliant with a certain "header-byte" pattern,
then the cell will be retained for further processing.
0 - Configures Receive User Cell Filter # 0 to NOT discard any
cells that have header byte patterns that are compliant with the
"user-defined" filtering criteria.
1 - Configures Receive User Cell Filter # 0 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 "Receive User Cell Filter # 0"
has been enabled.
Filter if Pattern Match - Receive User Cell Filter # 0:
This READ/WRITE bit-field permits the user to either configure
Receive User Cell Filter # 0 to filter (based upon the configura-
tion settings for Bits 1 and 2, in this register) ATM cells with
header bytes that match the "user-defined" header byte patterns,
or to filter ATM cells with header bytes that do NOT match the
"user-defined" header byte patterns.
0 - Configures Receive User Cell Filter # 0 to filter user cells that
do NOT match the header byte patterns (as defined in the " "
registers).
1 - Configures Receive User Cell Filter # 0 to filter user cells that
do match the header byte patterns (as defined in the " " regis-
ters).
NOTE: This bit-field is only active if "Receive User Cell Filter # 0"
has been enabled.
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