XRT79L71 Datasheet, PDF (400/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
BIT NUMBER
NAME
1
Discard Cell Enable
0
Filter if Pattern Match
TYPE
DESCRIPTION
R/W Discard Cell Enable - Transmit User Cell Filter # 1:
This READ/WRITE bit-field permits the user to either configure Trans-
mit User Cell Filter # 1 (within the Transmit ATM Cell Processor Block)
to discard all cells that have header byte patterns that comply with the
"user-defined" criteria, per Transmit User Cell Filter # 1, or NOT dis-
card any of these cells.
If the user configures Transmit User Cell Filter # 1 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 Transmit User Cell Filter # 1 to NOT discard any cells
that have header byte patterns that are compliant with the "user-
defined" filtering criteria.
1 - Configures Transmit User Cell Filter # 1 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 "Transmit User Cell Filter # 1" has
been enabled.
R/W Filter if Pattern Match - Transmit User Cell Filter # 1:
This READ/WRITE bit-field permits the user to either configure Trans-
mit User Cell Filter # 1 to filter (based upon the configuration 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 Transmit User Cell Filter # 1 to filter user cells that do
NOT match the header byte patterns (as defined in the " " registers).
1 - Configures Transmit User Cell Filter # 1 to filter user cells that do
match the header byte patterns (as defined in the " " registers).
NOTE: This bit-field is only active if "Transmit User Cell Filter # 1" has
been enabled.
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