
XRT79L71
REV. P1.0.3
PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
á
328
0
Filter if Pattern Match
R/W
Filter if Pattern Match - User Cell Filter # 3:This READ/WRITE
bit-field permits the user to either configure User Cell Filter # 3 to
filter (based upon the configuration 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 pat-
terns.
0 - Configures User Cell Filter # 3 to filter user cells that do NOT
match the header byte patterns (as defined in the " " registers).
1 - Configures User Cell Filter # 3 to filter user cells that do
match the header byte patterns (as defined in the " " registers).
N
OTE
:
This bit-field is only active if "User Cell Filter # 3" has
been enabled.
RECEIVE ATM CELL PROCESSOR BLOCK - RECEIVE USER CELL FILTER # 3 - PATTERN REGISTER -
HEADER BYTE 1 (ADDRESS = 0X1774)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
User Cell Filter # 3 - 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
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION
7 - 0
User Cell Filter # 3 - Pat-
tern Register - Header
Byte 1
R/W
User Cell Filter # 3 - Pattern Register - Header Byte 1:
The User Cell filtering criteria (for User Cell Filter # 3) is defined
based upon the contents of 9 read/write registers. These regis-
ters are the four "Receive ATM Cell Processor Block - Receive
User Cell Filter # 3 - Pattern Registers", the four "Receive ATM
Cell Processor Block - Receive User Cell Filter # 3 - Check Reg-
isters" and the "Receive ATM Cell Processor Block - Receive
User Cell Filter # 3 Control Register.
This READ/WRITE register, along with the "Receive ATM Cell
Processor Block - Receive User Cell Filter # 3 - Check Register -
Header Byte 1" permits the user to define the User Cell Filtering
criteria for "Octet # 1" of the incoming User Cell. The user will
write the header byte pattern (for Octet 1) that he/she wishes to
use as part of the "User Cell Filtering" criteria, into this register.
The user will also write in a value into the "Receive ATM Cell
Processor Block - Receive User Cell Filter # 3 - Check Register -
Header Byte 1" that indicates which bits within the first octet of
the incoming cells are to be compared with the contents of this
register.
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION