XRT79L71_1 Datasheet, PDF (377/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

REV. 1.0.0
XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
Transmit ATM Cell Processor Block - Transmit User Cell Filter Control - Filter 0 (Address = 0x1F43)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Transmit
User Cell Fil-
ter # 0
Enable
Copy Cell
Enable
Discard Cell
Enable
Filter if
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 Filter
# 0 Enable
2
Copy Cell Enable
TYPE
R/O
R/W
R/W
DESCRIPTION
Transmit User Cell Filter # 0 - Enable:
This READ/WRITE bit-field permits the user to either enable or
disable Transmit User Cell Filter # 0.
If the user enables Transmit User Cell Filter # 0, then Transmit
User Cell Filter # 0 will function per the configuration settings in
Bits 2 through 0, within this register.
If the user disables Transmit User Cell Filter # 0, then Transmit
User Cell Filter # 0 then all cells that are applied to the input of
Transmit User Cell Filter # 0 will pass through to the output of
Transmit User Cell Filter # 0.
0 - Disables Transmit User Cell Filter # 0.
1 - Enables Transmit User Cell Filter # 0.
Copy Cell Enable - Transmit User Cell Filter # 0:
This READ/WRITE bit-field permits the user to either configure
Transmit User Cell Filter # 0 (within the Transmit ATM Cell Pro-
cessor Block) to copy all cells that have header byte patterns
that comply with the user-defined criteria, per Transmit User Cell
Filter # 0, or to NOT copy any of these cells.
If the user configures Transmit 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
Transmit Cell Extraction Buffer.
If the user configures Transmit 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 Transmit Cell Extraction Buffer.
0 - Configures Transmit 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 Transmit 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
Transmit Cell Extraction Buffer.
NOTE: This bit-field is only active if Transmit User Cell Filter # 0
has been enabled.
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