Altera Shift Register IP Core - Manual (Page 5)

Related Information
Creating a System with Qsys
Parameters in the MegaWizard Plug-In Manager GUI
The LPM_SHIFTREG wizard guides you through the process of specifying parameters for the megafunction.
The following table lists parameters specific to the LPM_SHIFTREG megafunction:
Table 2: LPM_SHIFTREG MegaWizard Plug-in Manager Parameters
Description Function
Select the width for the 'q' output bus. The maximum size of the 'q' output
bus can be 256 bits. Manually enter widths greater than 256. How wide should the 'q' output bus
be?
Select 'left' or 'right' to define the direction of data shift. Which direction do you want the
registers to shift?
Select Data output, Serial shift data output, or select both. Which outputs do you want (select
at least one)?
Select one or more optional inputs to shift register.
• Select Serial shift data input to put serial data into the shift register.
This is the default setting.
• Select Clock Enable input to provide enable function to clock input.
• Select Parallel data input (load) to load shift register with parallel
data.
Do you want any optional inputs?
(MegaWizardpage 3)
Select synchronous and/or asynchronous inputs. Use synchronous or
asynchronous set and clear inputs of the shift register as optional features. Do you want any optional inputs?
(MegaWizard page 4)
Shift register has optional synchronous clear and set inputs. Use Clear
input to clear all registers synchronously. Turn on Set to either select Set
all to 1’s or to a particular value specified in Set to field.
The sclr signal affects q[] outputs before polarity is applied
to ports. If both sset and sclr are used and both are asserted,
sclr
is dominant.
Note:
Synchronous inputs
Shift register has optional asynchronous clear and set options. Use Clear
input to clear all registers asynchronously. Turn on Set to either select
Set all to 1’s or to a particular value specified in Set to field.
The aclr signal affectsq[] outputs before polarity is applied to
ports. If both aset and aclr are used and both are asserted,
aclr
is dominant.
Note:
Asynchronous inputs.
Altera Corporation LPM_SHIFTREG Megafunction
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5 Parameters in the MegaWizard Plug-In Manager GUI
UG-033105
2013.03.05