Jim,

Yes need to be sure the pull ups are enabled on these IRQ lines which will be inputs. 

Ok to have pull ups on all inputs. If we have a problem meeting the Vol input level we can disable later. 

Pull-ups are probably a high resistance, maybe 100K?

I have several external pull ups and a few pull downs. 

POR could be a special case but we can start with pull-up. 

Bob

On Nov 19, 2023, at 7:07 AM, Burns Fisher (AMSAT) via pacsat-dev <pacsat-dev@amsat.org> wrote:


You should double check this but I seem to remember that the internal pull-up/downs only work for INPUTS. Not sure if for example they would work on i2c. FWIW

On Sat, Nov 18, 2023 at 10:41 PM Jim McCullers via pacsat-dev <pacsat-dev@amsat.org> wrote:

Bob,

 

In the last column labeled Pullup/Down does “Add on chip pullup” mean set the pullup with the HCG configuration?

My assumption is yes but wanted to crosscheck before defining.

 

The configurator assigns a pullup to all inputs by default.

If not required I assumption they will need to be manually reset in HCG.

 

 

Thanks

 

Jim McCullers

WA4CWI


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