xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 417

• 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
Figure 102 An Illustration of the Configuration of the Four Receive User Cell Filters within the Receive
ATM Cell Processor block
Each of these four (4) User Cell filters can be configured to analyze all of the header bytes, within a given
ATM cell. Based upon the value of these header bytes (within a given cell), each of the four User Cell Filter
blocks can be configured to perform either of the following functions.
• To filter (e.g., discard) the cell
• To NOT filter (e.g., permit the cell to pass through, along the Data Path) the cell
• To replicate (or copy) the cell, and route the replicate cell to the “Receive ATM Cell Processor” block –
Extraction Processor block.
• To NOT replicate the cell.
Instructions on how to implement the following User Cell Filter options are presented below.
• Enabling/Disabling the User Cell Filter
• Defining the User Cell Filter Action
• Defining the User Cell Filter Sense
• Specifying the User Cell Filter Values
Verification Blocks
From HEC Byte
Filter # 3
Filter # 0
Filter # 1
Filter # 2
Filter # 3
Filter # 0
Filter # 1
Filter # 2
User
Cell
User
Cell
User
User
Cell
Cell
User
Cell
User
Cell
User
User
Cell
Cell
417
To Parity Calculation
Extraction
Memory
To Cell
Block
XRT94L33
Rev.1.2.0.