The base processor has a top speed of >200 MHz?

[Sam-Vervaeck]

I was wondering for a bit what would be the fastest speed I could run the NEORV32 at if it only has some basic properties turned on. So I created a little block diagram with only the timer, uart0, IMEM (16384), and DMEM (8192) turned on:

I am running the Genesys2 kintex-7 board which provides a diff crystal clock of 200 MHz. The clocking wizard was set to output a 200 MHz clock as well. Lo and behold, it actually implemented with a WNS of 0.174 ns.

Then I wanted to double check if the specs of the ISA extensions in the data sheet are still applicable since they are only marked as 130 MHz max. So I turned on Zfinx. To my surprise it implemented again with a WNS of 0.176 ns this time.

What are the top speeds you guys have been running the NEORV32 at?

[stnolting]

Then I wanted to double check if the specs of the ISA extensions in the data sheet are still applicable since they are only marked as 130 MHz max. So I turned on Zfinx. To my surprise it implemented again with a WNS of 0.176 ns this time.

That's a lot - even for a 7-series Kintex! 😉 🚀

What are the top speeds you guys have been running the NEORV32 at?

I have an UltraScale+ setup here running NEORV32 at 250MHz. A lot more would be possible; the critical path is caused by the many PMP entries we are using.

I would also be interested in some ASIC results 😅
Right now, I am testing a 180nm technology running at 100MHz. Seems possible, but I'm not (yet) sure where the upper limit is.