XRT79L71_1 Datasheet, PDF (286/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
REV. 1.0.0
BIT NUMBER
NAME
2
Copy Cell Enable
1
Discard Cell Enable
TYPE
R/W
R/W
DESCRIPTION
Copy Cell Enable - User Cell Filter # 1:
This READ/WRITE bit-field permits the user to either configure
User Cell Filter # 1 (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 # 1, or to
NOT copy any of these cells.
If the user configures User Cell Filter # 1 to copy all cells comply-
ing 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 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 Receive Cell Extraction Buffer.
0 - Configures 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 User Cell Filter # 1 to copy any cells that have
header byte patterns that are compliant with the user-defined fil-
tering 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.
Discard Cell Enable - User Cell Filter # 1:
This READ/WRITE bit-field permits the user to either configure
User Cell Filter # 1 (within the Receive ATM Cell Processor
Block) to discard all cells that have header byte patterns that
comply with the user-defined criteria, per User Cell Filter # 1, or
NOT discard any of these cells.
If the user configures User Cell Filter # 1 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 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 User Cell Filter # 1 to discard any cells that have
header byte patterns that are compliant with the user-defined fil-
tering criteria.
NOTE: This bit-field is only active if User Cell Filter # 1 has been
enabled.
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