XRT79L71_1 Datasheet, PDF (273/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

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XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
BIT NUMBER
NAME
1
Discard Cell Enable
0
Filter if Pattern Match
TYPE
R/W
R/W
DESCRIPTION
Discard 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 discard all cells that have header byte patterns
that comply with the user-defined criteria, per Receive User Cell
Filter # 0, or NOT discard any of these cells.
If the user configures Receive User Cell Filter # 0 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 Receive User Cell Filter # 0 to NOT discard any
cells that have header byte patterns that are compliant with the
user-defined filtering criteria.
1 - Configures Receive User Cell Filter # 0 to discard any cells
that have header byte patterns that are compliant with the user-
defined filtering criteria.
NOTE: This bit-field is only active if Receive User Cell Filter # 0
has been enabled.
Filter if Pattern Match - Receive User Cell Filter # 0:
This READ/WRITE bit-field permits the user to either configure
Receive User Cell Filter # 0 to filter (based upon the configura-
tion settings for Bits 1 and 2, in this register) ATM cells with
header bytes that match the user-defined header byte patterns,
or to filter ATM cells with header bytes that do NOT match the
user-defined header byte patterns.
0 - Configures Receive User Cell Filter # 0 to filter user cells that
do NOT match the header byte patterns (as defined in the "? "
registers).
1 - Configures Receive User Cell Filter # 0 to filter user cells that
do match the header byte patterns (as defined in the "? " regis-
ters).
NOTE: This bit-field is only active if Receive User Cell Filter # 0
has been enabled.
Receive ATM Cell Processor Block - Receive User Cell Filter # 0 - Pattern Register - Header Byte 1
(Address = 0x1744)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Receive User Cell Filter # 0 - Pattern Register - Byte 1 [7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
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