IPR-NIOS Altera, IPR-NIOS Datasheet - Page 126

• Manufacturer Part Number: IPR-NIOS
• Description: IP NIOS II MEGACORE RENEW
• Manufacturer: Altera
• Type: MegaCorer

Specifications of IPR-NIOS

• License: Renewal License
• Lead Free Status / RoHS Status: Not applicable / Not applicable

4–18
Figure 4–6. Custom Instructions Page in the Nios II Processor Parameter Editor
Nios II Processor Reference Handbook
f
1
To create your own custom instruction using the component editor, click Import.
After finishing in the component editor, the new instruction appears in the list at the
left side of the Custom Instructions page.
All signals in Nios II custom instructions must have the Custom Instruction Slave
interface type. To guarantee the component editor automatically selects the Custom
Instruction Slave interface type for your signals correctly during import, begin your
signal names with the prefix ncs_. This prefix allows the component editor to
determine the connection point type: a Nios II custom instruction slave. For example,
if a custom instruction component has two data signals plus clock, reset, and result
signals, an appropriate set of signal names is ncs_dataa, ncs_datab, ncs_clk,
ncs_reset, and ncs_result.
A complete discussion of the hardware and software design process for custom
instructions is beyond the scope of this chapter. For full details on the topic of custom
instructions, including working example designs, refer to the
Instruction User
The following sections describe the default custom instructions Altera provides.
Guide.
Chapter 4: Instantiating the Nios II Processor in SOPC Builder
December 2010 Altera Corporation
Nios II Custom
Custom Instructions Page