User Manual block diagram does not illustrate the eXtension Interface

Placeholder Mike Thompson
2024-02-16T16:42:06Z

The [block diagram](https://docs.openhwgroup.org/projects/cv32e40x-user-manual/en/latest/intro.html#blockdiagram) does not illustrate the eXtension Interface, which is a key feature of this core. A high-level illustration is provided in the [eXtension Interface](https://docs.openhwgroup.org/projects/cv32e40x-user-manual/en/latest/x_ext.html) chapter, but this is not sufficient. The top-level block diagram should also include this, showing the connections to the pipeline at the same level of detail as the other interfaces.