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It's Question Day - Propstick USB inquiry — Parallax Forums

It's Question Day - Propstick USB inquiry

RumpleRumple Posts: 38
edited 2009-09-13 03:36 in Propeller 1
I see that the Propstick USB has an EEPROM connected to ports 28 and 29...which I won't be using for this project.· Should I remove the EEPROM (and the pullup on its data line) before attempting to use those ports for general purpose I/O?

Comments

  • StefanL38StefanL38 Posts: 2,292
    edited 2009-09-12 16:37
    Hello Rumple,

    are you aware of the fact that if you remove the eeprom you have to download your program to RAM EVERY time you switch off/on the powersupply or reset the propeller ?

    As the resistor is a Pull-up it doesn't disturb the IO in general. If you would like to have a Pull-down-resistor for what reason ever you would have to change it
    or other reason the pull-up as its name says pulls up the voltage-level. If you connect something to this pin during the bootprocess the pin will be high =3.3V
    until you configure it as output and low

    best regards

    Stefan
  • RumpleRumple Posts: 38
    edited 2009-09-13 03:36
    Yes, I'm aware. I guess the question is actually does the presence of that EEPROM hinder the operation of those two ports if I was to want to use them as plain 'ol I/O. I suppose I'll end end up removing it but I was wondering if there was anyone who could provide a good reason why I shouldn't have to.
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