Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 03:01 22 Nov 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Microcontroller and PC projects : PicoMiteVGA dead after set to 378MHz

Author Message
Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 721
Posted: 02:23pm 08 Mar 2023
Copy link to clipboard 
Print this post

Hello,

after trying the latest version of picoMiteVGA (2023-03-07_001019_PicoMiteVGA)
everything worked fine, but right after setting

OPTION CPUSPEED 378000


the pico is dead, no blinkin onboard led and no connection via TeraTerm. I re-flashed the firmware to the official release on the geoff website and it is still dead.

And yes, I looked in the manual on page 10 which suggest to clear the flash, but the link in the manual is broken (https://geoffg.net/Downloads/picomite/Clear_Flash.uf2)

In the offical release on the geoff website is no clear flash firmware in the archieve...

Would anybody please provide me a link to it?

Greetings
Daniel
 
twofingers

Guru

Joined: 02/06/2014
Location: Germany
Posts: 1682
Posted: 02:28pm 08 Mar 2023
Copy link to clipboard 
Print this post

Hi Daniel
2021-12-17_025627_Clear_flash.zip

Regards
Michael
causality ≠ correlation ≠ coincidence
 
Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 721
Posted: 02:56pm 08 Mar 2023
Copy link to clipboard 
Print this post

Thank you Michael, that worked.

This is the first pico on which 378Mhz is not working... Flashed about 6 or so.

Greetings
Daniel
 
Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 8305
Posted: 03:01pm 08 Mar 2023
Copy link to clipboard 
Print this post

It's *way* beyond specification for the RP2040. Don't be surprised if you get reliability issues at some point even if they appear to be working.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 721
Posted: 03:10pm 08 Mar 2023
Copy link to clipboard 
Print this post

Hello Mick!

You are right, I was not even expecting to go this far but since it worked on all my previous picos I thought: "why not?".

Now I rather stick to 252000 (this works on this very pico!). Even 252Mhz is a HUGE improvement to the standard cpu speed.

Greetings
Daniel
 
Plasmamac

Guru

Joined: 31/01/2019
Location: Germany
Posts: 596
Posted: 08:26pm 08 Mar 2023
Copy link to clipboard 
Print this post

I flashed 4 picos and only one works with 378 MHZ. Sometimes    
Plasma
 
Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 721
Posted: 09:17pm 08 Mar 2023
Copy link to clipboard 
Print this post

I was curious and tested all my available picos and came up with:

15 tested in total, two of them were not able to clock as high as 378Mhz but all of them took the 252Mhz.

So I think we should consider 378Mhz as a nice option if it works, but not think that things run perfect. I rather stick to 252Mhz :)

Greetings
Daniel
Edited 2023-03-09 07:20 by Amnesie
 
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025