XRT79L71 Datasheet, PDF (399/441 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
TRANSMIT ATM CELL PROCESSOR BLOCK - TRANSMIT USER CELL FILTER CONTROL - FILTER 1
(ADDRESS = 0X1F53)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Transmit User
Cell Filter # 1
Enable
Copy Cell
Enable
Discard Cell Filter if
Enable _{Pattern 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
Transmit User Cell Fil-
ter # 1 Enable
2
Copy Cell Enable
TYPE
DESCRIPTION
R/O
R/W Transmit User Cell Filter # 1 - Enable:
This READ/WRITE bit-field permits the user to either enable or dis-
able Transmit User Cell Filter # 1. If the user enables Transmit User
Cell Filter # 1, then Transmit User Cell Filter # 1 will function per the
configuration settings in Bits 2 through 0, within this register.
If the user disables Transmit User Cell Filter # 1, then Transmit User
Cell Filter # 1 then all cells that are applied to the input of Transmit
User Cell Filter # 1 will pass through to the output of Transmit User
Cell Filter # 1.
0 - Disables Transmit User Cell Filter # 1.
1 - Enables Transmit User Cell Filter # 1.
R/W Copy 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 copy all cells that have header byte patterns that comply with the
"user-defined" criteria, per Transmit User Cell Filter # 1, or to NOT
copy any of these cells.
If the user configures Transmit User Cell Filter # 1 to copy all cells
complying with a certain "header-byte" pattern, then a copy (or repli-
cate) of this "compliant" ATM cell will be routed to the Transmit Cell
Extraction Buffer.
If the user configures Transmit User Cell Filter # 1 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 Transmit Cell Extraction Buffer.
0 - Configures Transmit User Cell Filter # 1 to NOT copy any cells that
have header byte patterns which are compliant with the "user-defined"
filtering criteria.
1 - Configures Transmit User Cell Filter # 1 to copy any cells that have
header byte patterns that are compliant with the "user-defined" filter-
ing criteria, and to route these copies (of cells) to the Transmit Cell
Extraction Buffer.
NOTE: This bit-field is only active if "Transmit User Cell Filter # 1" has
been enabled.
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