The following table shows the revision history for this document.
| Section | Revision Summary |
|---|---|
| 11/26/2025 Version 5.0 | |
| Global updates | Core version and screenshots updated across the document. |
| Overview | Updated this section. |
| Product Specification | Updated to remove that AXI4-Lite uses a 13-bit address. |
| Performance | Updated to remove that AXI4-Lite uses a 13-bit address. |
| System Interface Ports | Updated this section. |
| Register Address Space | Updated this section. |
| IP Integrator | Updated this section. |
| Interface Specifications Tab | Updated this section. |
| Rebuilding the Software Driver | Added this section. |
| Software Application Example Design | Updated this section. |
| Hardware Debug | Updated this section. |
| 05/29/2025 Version 4.0 | |
| N/A | Core version updated. |
| 11/27/2024 Version 3.1 | |
| N/A | Core version updated. |
| Overview | Updated range values for LOOKUP_RATE, LOOKUP_INTERFACE_FREQ, and RAM_FREQ configuration parameters. |
| Performance | Updated table with latency information and minor corrections. |
| Boot Sequence | New section. |
| CAM Specification Tab | Updated figures. |
| 05/30/2024 Version 3.0 | |
| N/A | Core version updated. |
| System Interface Ports | Added details of key_rstn and corrected details of ram_rstn. |
| Resets | Added clarification. |
| User Parameters | Added VARIABLE_RATE and PHYSICAL_CONSTRAINTS parameters, and made minor corrections. |
| AXI4-Lite Interface Ports | New section. |
| Simulation Debug | Minor clarifications to debug flag descriptions. |
| Hardware Debug | Added details about software driver bringup, inserting entries, and lookup operations. |
| 11/01/2023 Version 2.6 | |
| N/A | Core version updated. |
| Features | Updated key width. |
| Overview | Updated configuration parameter descriptions. |
| Lookup Interface Ports | Updated figure. |
| Clocking | Added information for running timing analysis with -2M speed grades. |
| CAM Specification Tab | Updated screenshots and parameters |
| CAM Example Design | Added topic. |
| 05/10/2023 Version 2.5 | |
| N/A | Core version updated. |
| 11/08/2022 Version 2.4 | |
| Performance | Added note on AXI4-Lite when switching between read and write. |
| Format String | Added note. |
| CAM Specification Tab |
|
| 05/25/2022 Version 2.3 | |
| Overview | Added CBCAM information. |
| Error Correction Coding (ECC) | Added information on lookup operations. |
| Performance | Updated notes. |
| Lookup Interface Ports | Updated ports and updated figure. |
| Customizing and Generating the Core | Updated core version. |
| CAM Specification Tab | Updated figures. |
| User Parameters | Added new parameter. |
| Upgrading | Added reference to UG896. |
| Hardware Debug | Added ports. |
| 07/27/2021 Version 2.2 | |
| Initial release. | N/A |