The following figure shows the three settings in the General Settings page.
Figure 1. RTL Kernel Wizard General Settings Page
The following are three settings in the General Settings page.
- Kernel name
- The kernel name. This will be the name of the IP, top-level module name, kernel, and C/C++ functional model. This identifier shall conform to C and Verilog identifier naming rules. It must also conform to Vivado IP integrator naming rules, which prohibits underscores except when placed in between alphanumeric characters.
- Kernel vendor
- The name of the vendor. Used in the Vendor/Library/Name/Version (VLNV) format described in the Vivado Design Suite User Guide: Designing with IP (UG896).
- Kernel library
- The name of the library. Used in the VLNV. Must conform to the same identifier rules.
- Kernel control interface
- There are three types of control interfaces available for the RTL
ap_ctrl_none. This defines the
<kernel>tag as described in RTL Kernel XML File.
Clock and Reset options
- Number of clocks
- Sets the number of clocks used by the kernel. Every RTL kernel has one
primary clock called
ap_clkand an optional reset called
ap_rst_n. All AXI interfaces on the kernel are driven with this clock.
When setting Number of clocks to 2, a secondary clock and optional reset are provided to be used by the kernel internally. The secondary clock and reset are called
ap_rst_n_2. This secondary clock supports independent frequency scaling and is independent from the primary clock. The secondary clock is useful if the kernel clock needs to run at a faster or slower rate than the AXI4 interfaces, which must be clocked on the primary clock.Important: When designing with multiple clocks, proper clock domain crossing techniques must be used to ensure data integrity across all clock frequency scenarios. Refer to UltraFast Design Methodology Guide for FPGAs and SOCs (UG949) for more information.
- Has reset
- Specifies whether to include a top-level reset input port to the kernel. Omitting a reset can be useful to improve routing congestion of large designs. Any registers that would normally have a reset in the design should have proper initial values to ensure correctness. If enabled, there is a reset port included with each clock. Block Design type kernels must have a reset input.