Download Xilinx DS250 LogiCORE IP Interleaver/De

LogiCORE IP Interleaver/De-Interleaver v6.0
Number of Selectable Columns
If the selectable column type has been chosen, this parameter defines how many valid selection values have been
defined in the COE file. Only add select values you need.
Use Column Permute File
This tells the CORE Generator software that a column permute vector exists in the COE file and column permutations are to be performed. Remember this is only possible for unpruned interleaver/de-interleavers.
Row Type
There are three possibilities:
1.
Constant. The number of rows is always equal to the Row Constant Value parameter.
2.
Variable. The number of rows is sampled from the ROW input at the start of each new block. Row permutations
are not supported for the variable row type.
3.
Selectable. ROW_SEL is sampled at the start of each new block. This value is then used to select from one of the
possible values for number of rows provided in the COE file.
Row Constant Value
This parameter is relevant only if constant row type is selected. The number of rows is fixed at this value.
ROW Port Width
This parameter is relevant only if variable row type is selected. It sets the width of the ROW input bus. The smallest
possible value should be used to keep the core as small as possible.
Number of Selectable Rows
If the selectable row type has been chosen, this parameter defines how many valid selection values have been
defined in the COE file. Only add select values you need.
Minimum Number of Rows
This parameter is relevant only if variable row type is selected. In this case the core has to potentially cope with a
wide range of possible values for the number of rows. If the smallest value that will actually occur is known, then
the amount of logic in the core can sometimes be reduced. The largest possible value should be used for this parameter to keep the core as small as possible.
Use Row Permute File
This tells the CORE Generator software that a row permute vector exists in the COE file, and row permutations are
to be performed. Remember this is possible only for unpruned interleaver/de-interleavers.
DS250 March 1, 2011
Product Specification
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