XRT79L71 Datasheet, PDF (296/441 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
RECEIVE ATM CELL PROCESSOR BLOCK - RECEIVE USER CELL FILTER CONTROL - FILTER 0
(ADDRESS = 0X1743)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Receive User
Cell Filter # 0
Enable
Copy Cell
Enable
Discard Cell Filter if Pat-
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
Receive User Cell Filter #
0 Enable
2
Copy Cell Enable
TYPE
R/O
R/W
R/W
DESCRIPTION
Receive User Cell Filter # 0 - Enable:
This READ/WRITE bit-field permits the user to either enable or
disable Receive User Cell Filter # 0. If the user enables Receive
User Cell Filter # 0, then User Cell Filter # 0 will function per the
configuration settings in Bits 2 through 0, within this register.
If the user disables Receive User Cell Filter # 0, then User Cell
Filter # 0 then all cells that are applied to the input of Receive
User Cell Filter # 0 will pass through to the output of Receive
User Cell Filter # 0.
0 - Disables Receive User Cell Filter # 0.
1 - Enables Receive User Cell Filter # 0.
Copy 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 copy all cells that have header byte patterns that
comply with the "user-defined" criteria, per Receive User Cell Fil-
ter # 0, or to NOT copy any of these cells.
If the user configures Receive User Cell Filter # 0 to copy all cells
complying with a certain "header-byte" pattern, then a copy (or
replicate) of this "compliant" ATM cell will be routed to the
Receive Cell Extraction Buffer.
If the user configures Receive User Cell Filter # 0 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 Receive User Cell Filter # 0 to NOT copy any cells
that have header byte patterns which are compliant with the
"user-defined" filtering criteria.
1 - Configures Receive User Cell Filter # 0 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 "Receive User Cell Filter # 0"
has been enabled.
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