Pulpissimo block diagram

[kgf]

There is probably not something more than
https://github.com/pulp-platform/pulpiss..._archi.png

Any synthesis program can generate a more detailed diagram, but you have to realize that connections like TCDM and APB use many wires and busses that do not get drawn bundled together in such automaticly drawn schematics, creating a large jumble of wires that would for most purposes be less understandable.

Consider that HDL coding originated to replace block diagrams with code, it might be easier to find what you need through the code (i.e.)
https://github.com/pulp-platform/pulp_so...ulp_soc.sv