XRT79L71 Datasheet, PDF (323/441 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
RECEIVE ATM CELL PROCESSOR BLOCK - RECEIVE USER CELL FILTER CONTROL - FILTER 2
(ADDRESS = 0X1763)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
User Cell Fil- Copy Cell Discard Cell Filter if Pat-
ter # 0 Enable Enable
Enable
tern Match
R/O
R/O
R/O
R/O
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
7-4
Unused
3
User Cell Filter # 2
Enable
2
Copy Cell Enable
TYPE
R/O
R/W
R/W
DESCRIPTION
User Cell Filter # 2 - Enable:
This READ/WRITE bit-field permits the user to either enable or
disable User Cell Filter # 2. If the user enables User Cell Filter #
0, then User Cell Filter # 2 will function per the configuration set-
tings in Bits 2 through 0, within this register.
If the user disables User Cell Filter # 2, then User Cell Filter # 0
then all cells that are applied to the input of User Cell Filter # 2
will pass through to the output of User Cell Filter # 2.
0 - Disables User Cell Filter # 2.
1 - Enables User Cell Filter # 2.
Copy Cell Enable - User Cell Filter # 2:
This READ/WRITE bit-field permits the user to either configure
User Cell Filter # 2 (within the Receive ATM Cell Processor
Block) to copy all cells that have header byte patterns that com-
ply with the "user-defined" criteria, per User Cell Filter # 2, or to
NOT copy any of these cells.
If the user configures User Cell Filter # 2 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 # 2 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 # 2 to NOT copy any cells that
have header byte patterns which are compliant with the "user-
defined" filtering criteria.
1 - Configures User Cell Filter # 2 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.
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