á
PRELIMINARY
DS3 UNI FOR ATM
XRT7245
REV. 1.03
105
Writing a “1” to a particular bit in this register, forces
the User Cell Filter to check and compare the corre-
sponding bit in octet 1 of the incoming user cell with
the corresponding bit in the “Rx CP User Cell Filter
Pattern Header—Byte 1” register.
Writing a “0” to a particular bit, causes the User Cell
Filter to treat the corresponding bit of octet 1 in the
incoming user cell as a “don’t care” (e.g., to forgo the
comparison between the corresponding bit in octet 1
of the incoming user with the corresponding bit in the
“Rx CP User Cell Filter Pattern Header—Byte 1”
register.)
For more information on User Cell Filtering, please
see Section 7.3.2.3.2.
3.3.2.93
Rx CP User Cell Filter Mask Header—Byte 2
This “Read/Write” register allows the user to specify
which bit(s), in octet 2 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 2” register (Address
= 59h) by the User Cell Filter, when determining
whether a given user cell is to be filtered out or writ-
ten to the Rx FIFO.
Writing a “1” to a particular bit in this register, forces
the User Cell Filter to check and compare the corre-
sponding bit in octet 2 of the incoming user cell with
the corresponding bit in the “Rx CP User Cell Filter
Pattern Header—Byte 2” register.
Writing a “0” to a particular bit, causes the User Cell
Filter to treat the corresponding bit of octet 2 in the
incoming user cell as a “don’t care” (e.g., to forgo the
comparison between the corresponding bit in octet 2
of the incoming user with the corresponding bit in the
“Rx CP User Cell Filter Pattern Header—Byte 2”
register.)
For more information on User Cell Filtering, please
see Section 7.3.2.3.2.
3.3.2.94
Rx CP User Cell Filter Mask Header—Byte 3
This “Read/Write” register allows the user to specify
which bit(s), in octet 3 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 3” register (Address
= 5Ah) by the User Cell Filter, when determining
whether a given user cell is to be filtered out or writ-
ten to the Rx FIFO.
Writing a “1” to a particular bit in this register, forces
the User Cell Filter to check and compare the corre-
sponding bit in octet 3 of the incoming user cell with
the corresponding bit in the “Rx CP User Cell Filter
Pattern Header—Byte 3” register.
Writing a “0” to a particular bit, causes the User Cell
Filter to treat the corresponding bit of octet 3 in the
incoming user cell as a “don’t care” (e.g., to forgo the
comparison between the corresponding bit in octet 3
of the incoming user with the corresponding bit in the
“Rx CP User Cell Filter Pattern Header—Byte 3”
register.)
For more information on User Cell Filtering, please
see Section 7.3.2.3.2.
Address = 5Dh, Rx CP User Cell Filter Mask 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 Mask Header—Byte 2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
1
1
1
Address = 5Eh, Rx CP User Cell Filter Mask 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 Mask Header—Byte 3
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
1
1
1