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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
PRELIMINARY
XRT79L71
REV. P1.0.3
401
TRANSMIT ATM CELL PROCESSOR BLOCK - TRANSMIT USER CELL FILTER CONTROL - FILTER 2
(ADDRESS = 0X1F63)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Unused
Transmit User
Cell Filter # 2
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
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION
7 - 4
Unused
R/O
3
Transmit User Cell Fil-
ter # 2 Enable
R/W
Transmit User Cell Filter # 2 - Enable:
This READ/WRITE bit-field permits the user to either enable or dis-
able Transmit User Cell Filter # 2. If the user enables Transmit User
Cell Filter # 2, then Transmit User Cell Filter # 2 will function per the
configuration settings in Bits 2 through 0, within this register.
If the user disables Transmit User Cell Filter # 2, then Transmit User
Cell Filter # 2 then all cells that are applied to the input of Transmit
User Cell Filter # 2 will pass through to the output of Transmit User
Cell Filter # 2.
0 - Disables Transmit User Cell Filter # 2.
1 - Enables Transmit User Cell Filter # 2.
2
Copy Cell Enable
R/W
Copy Cell Enable - Transmit User Cell Filter # 2:
This READ/WRITE bit-field permits the user to either configure Trans-
mit User Cell Filter # 2 (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 # 2, or to NOT
copy any of these cells.
If the user configures Transmit User Cell Filter # 2 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 # 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 Transmit Cell Extraction Buffer.
0 - Configures Transmit 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 Transmit User Cell Filter # 2 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.
N
OTE
:
This bit-field is only active if "Transmit User Cell Filter # 2" has
been enabled.