
Parameter Value Description
Horizontal coefficient banks 1–32, Default = 1 Select the number of banks of horizontal filter
coefficients for polyphase algorithms.
Horizontal coefficient function
• Lanczos_2
• Lanczos_3
• Custom
Select the function used to generate the
horizontal scaling coefficients. Select either
one for the pre-defined Lanczos functions or
choose Custom to use the coefficients saved
in a custom coefficients file.
Horizontal coefficients file User-specified When a custom function is selected, you can
browse for a comma-separated value file
containing custom coefficients. Key in the
path for the file that contains these custom
coefficients.
Add extra pipelining registers On or Off
Turn on to add extra pipeline stage registers
to the data path.
You must to turn on this option to achieve:
• frequency of 150 MHz for Cyclone III or
Cyclone IV devices
• frequencies above 250 MHz for Arria II,
Stratix IV, or Stratix V devices
Scaler II Signals
Table 17-3: Common Signals
Signal Direction Description
main_clock Input The main system clock. The IP core operates on the rising
edge of this signal.
main_reset Input The IP core asynchronously resets when you assert this
signal. You must deassert this signal synchronously to the
rising edge of the main_clock signal.
din_data Input din port Avalon-ST data bus. This bus enables the
transfer of pixel data into the IP core.
din_endofpacket Input din port Avalon-ST endofpacket signal. This signal
marks the end of an Avalon-ST packet.
din_ready Output din port Avalon-ST ready signal. This signal indicates
when the IP core is ready to receive data.
din_startofpacket Input din port Avalon-ST startofpacket signal. This signal
marks the start of an Avalon-ST packet.
17-12
Scaler II Signals
UG-VIPSUITE
2015.05.04
Altera Corporation
Scaler II IP Core
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