[Libre-soc-dev] Unexpected clock connexions.

Luke Kenneth Casson Leighton lkcl at lkcl.net
Thu Jun 3 14:44:03 BST 2021


---
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68


On Thu, Jun 3, 2021 at 2:33 PM Jean-Paul Chaput <Jean-Paul.Chaput at lip6.fr>
wrote:

>
> Ha. You may have got a wrong impression about clock tree & H-Tree due
> to a trick I used to cut corners.
>

probably :)


>
> For the clock signals, do I read correctly that some components with
> run at *external* clock speed (DEBUG & DMI) ?


NO. Debug-DMI and JTAG run at the *PLL* clock.

but they **GENERATE** the RESET signal that is used by the REST of
TestIssuer.

hence why i asked if the debug reset out should be an H-Tree (of some kind)

i will draw it as a diagram.


More information about the Libre-soc-dev mailing list