
XRT7245
DS3 UNI FOR ATM
á
PRELIMINARY
REV. 1.03
104
3.3.2.90
Rx CP User Cell Filter Pattern Header—Byte 3
The User (or Assigned) cell filtering criteria is defined
based upon the contents of 8 read/write registers.
These registers are the four “Rx CP User Cell Filter
Pattern Header Byte” Registers, and the four “Rx CP
User Cell Filter Mask Header Byte” register. This
“Read/Write” register, along with the “Rx CP User
Cell Filter Mask Header—Byte 3” register (Address =
5Eh) allows the user to define the User (or Assigned)
cell filtering criteria for octet 3 of the incoming user
cell. The user will write the header byte pattern for
octet 3, 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 to the “Rx CP User Cell Filter
Mask Header—Byte 3” register, that indicates which
bits within the third octet of the incoming cell are to
be compared with the contents of this register.
For more information on the User Cell Filter, please
see Section 7.3.2.3.2.
3.3.2.91
Rx CP User Cell Filter Pattern Header—Byte 4
The User (or Assigned) cell filtering criteria is defined
based upon the contents of 8 read/write registers.
These registers are the four “Rx CP User Cell Filter
Pattern Header Byte” Registers, and the four “Rx CP
User Cell Filter Mask Header Byte” register. This
“Read/Write” register, along with the “Rx CP User
Cell Filter Mask Header—Byte 4” register (Address =
5Fh) allows the user to define the User (or Assigned)
cell filtering criteria for octet 4 of the incoming user
cell. The user will write the header byte pattern for
octet number 4, 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 to the “Rx CP User Cell
Filter Mask Header—Byte 4” register, that indicates
which bits within the fourth octet of the incoming cell
are to be compared with the contents of this register.
For more information on the User Cell Filter, please
see Section 7.3.2.3.2.
3.3.2.92
Rx CP User Cell Filter Mask Header—Byte 1
This “Read/Write” register allows the user to specify
which bit(s), in octet 1 of the incoming user cell (in
the Receive Cell Processor) are to be checked
against the corresponding bit(s) in the “Rx CP User
Cell Filter Pattern Header—Byte 1” register (Address
= 58h) by the User Cell Filter, when determining
whether a given user cell is to be filtered out or writ-
ten to the Rx FIFO.
Address = 5Ah, Rx CP User Cell Filter Pattern Header—Byte 3
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Rx User Cell Header Pattern—Byte 3
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
Address = 5Bh, Rx CP User Cell Filter Pattern Header—Byte 4
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Rx User Cell Header Pattern—Byte 4
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
Address = 5Ch, Rx CP User Cell Filter Mask Header—Byte 1
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Rx User Cell Mask Header—Byte 1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
1
1
1