Altera CIC MegaCore Function - Manual (Page 24)

Parameter Value Description
Number of stages 1 to 12 Specifies the required number of stages.
Differential delay 1, 2 Specifies the differential delay in cycles.
Enable variable
rate change factor
On or Off Turn on to enable a variable rate change factor that
you can change at runtime. When this option is on,
the Rate change factor parameter is not available but
you can specify minimum and maximum values.
Rate change factor 2 to 32000 Specifies the rate change factor.
Number of
interfaces
1 to 128 Specifies the number of MISO inputs or SIMO
outputs The product of the Number of interfaces
and the Number of channels per interface must be
no more than 1024.
Number of
channels per
interface
1 to 1024 Specifies the number of channels per interface. The
product of the Number of interfaces and the
Number of channels per interface must be no more
than 1024
Interface Specification
Input data width
1 to 32 Specifies the input data width in bits.
Output Rounding
Options
None, Truncation,
Convergent
rounding, Rounding
up, Saturation,
Hogenauer pruning
Selects the required rounding output mode. Select
None for full output resolution. The saturation limit
is the maximum value for overflow or the minimum
value for negative overflow. Hogenauer pruning is
available only when a Decimator filter type is selected
in the Architecture page.
Output data width 1 to calculated
maximum data
width
Specifies the output data width in bits.
implementation Options
Integrator data
storage
Logic Element,
Memory
Selects whether to implement the integrator data
storage as logic elements or memory. The Memory
option is available for integrator data storage when
the Number of channels per interface is greater than
4.
RAM type of
integrator data
storage
AUTO, M9K, M10K,
M20K, M144K,
MLAB
When you select Memory, you can select the RAM
type for integrator data storage. The Memory option
is available for integrator data storage when the
Number of channels per interface is greater than 4.
3-8 CIC IP Core Parameters
UG-CIC
2014.12.15
Altera Corporation CIC IP Core Functional Description
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