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.orgmailto: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
-----------------------------------------------------------
pacsat-dev mailing list -- pacsat-dev@amsat.orgmailto:pacsat-dev@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org To unsubscribe send an email to pacsat-dev-leave@amsat.orgmailto:pacsat-dev-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
-----------------------------------------------------------
pacsat-dev mailing list -- pacsat-dev@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org To unsubscribe send an email to pacsat-dev-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org