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PRELIMINARY
DS3 UNI FOR ATM
XRT7245
REV. 1.03
103
Header—Byte 4” register (Address = 53h) by the Idle
Cell Filter, when the Receive Cell Processor is trying
to determine if an incoming cell is an Idle Cell or not.
Writing a “1” to a particular bit in this register, forces
the Receive Cell Processor to check and compare the
corresponding bit in byte 4 of the incoming cell with
the corresponding bit in the “Rx CP Idle Cell Pattern
Header—Byte 4” register.
Writing a “0” to a particular bit, causes the Receive
Cell Processor to treat the corresponding bit of byte 1
in the incoming cell as a “don’t care” (e.g., to forgo the
comparison between the corresponding bit in byte 4 of
the incoming cell with the corresponding bit in the “Rx
CP Idle Cell Pattern Header—Byte 4” register.)
For more information on Idle Cell Handling, please
see Section 7.3.2.3.1.
3.3.2.88
Rx CP User Cell Filter Pattern Header—Byte 1
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 1” register (Address =
5Ch) allows the user to define the User (or Assigned)
cell filtering criteria for octet 1 of the incoming user
cell. The user will write in 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 to the “Rx CP User Cell Filter
Mask Header—Byte 1” register, that indicates which
bits within the first 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.
3.3.2.89
Rx CP User Cell Filter Pattern Header—Byte 2
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 2” register (Address =
5Dh) allows the user to define the User (or Assigned)
cell filtering criteria for octet 2 of the incoming user
cell. The user will write the header byte pattern for
octet 2, 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 2” register, that indicates which
bits within the second 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.
Address = 58h, Rx CP User Cell Filter Pattern 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 Header Pattern—Byte 1
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 = 59h, Rx CP User Cell Filter Pattern Header—Byte 2
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 2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0