xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 185

• Manufacturer Part Number: xrt94l33
• Description: Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
• Manufacturer: Exar Corporation

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
Transmit ATM Filter # 0, # 1, # 2, # 3 Check – Header Byte 4 (Address = 0xNF4B, 0xNF5B, 0xNF6B,
0xNF7B)
Note:
2.2.6.7
The user can keep account of the number of User Cells that have been filtered out by the Transmit User Cell
Filter by periodically reading out the contents of the “Transmit ATM Filter Count” Registers. Each time a user
cell is filtered (e.g., either discarded or copied) by the “Transmit User Cell” Filter, then this counter will be
incremented by the value of “1”. This counter will increment until it reaches the value of 0xFFFFFFFF. At this
time, the counter will “saturate” and will not increment any further until read. These registers are 32 bits, in
width and are “RESET-upon-READ.
presented below.
Transmit ATM Filter # 0, # 1, # 2, # 3 – Filtered Cell Counter – Byte 3 (Address = 0xNF4C, 0xNF5C,
0xNF6C, 0xNF7C)
Transmit ATM Filter # 0, # 1, # 2, # 3 – Filtered Cell Counter – Byte 2 (Address = 0xNF4D, 0xNF5D,
0xNF6D, 0xNF7D)
Transmit ATM Filter # 0, # 1, # 2, # 3 – Filtered Cell Counter – Byte 1 (Address = 0xNF4E, 0xNF5E,
0xNF6E, 0xNF7E)
B
B
B
B
RUR
RUR
RUR
R/W
IT
IT
IT
IT
0
0
0
0
7
7
7
7
Each of the four User Cell Filters (within the Transmit ATM Cell Processor block) contains their own set of “User
Cell Filter – Check” registers.
C
OUNTING
B
B
RUR
B
RUR
B
RUR
R/W
IT
IT
IT
IT
0
0
0
0
6
6
6
6
F
ILTERED
B
B
RUR
B
RUR
B
RUR
R/W
C
IT
IT
IT
IT
0
0
0
0
ELLS
5
5
5
5
User Cell Filter Check – Header Byte 4[7:0]
The bit-format for these registers (for each of the four filters) is
Filtered Cell Count[31:24]
Filtered Cell Count[23:16]
Filtered Cell Count[15:8]
B
B
RUR
B
RUR
B
RUR
R/W
IT
IT
IT
IT
0
0
0
0
4
4
4
4
185
B
B
RUR
B
RUR
B
RUR
R/W
IT
IT
IT
IT
0
0
0
0
3
3
3
3
B
B
RUR
B
RUR
B
RUR
R/W
IT
IT
IT
IT
0
0
0
0
2
2
2
2
B
B
RUR
B
RUR
B
RUR
R/W
IT
IT
IT
IT
0
0
0
0
1
1
1
1
XRT94L33
Rev.1.2.0.
B
B
RUR
B
RUR
B
RUR
R/W
IT
IT
IT
IT
0
0
0
0
0
0
0
0