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Can I power additional eeprom using Propeller IO pin? — Parallax Forums

Can I power additional eeprom using Propeller IO pin?

william chanwilliam chan Posts: 1,326
edited 2008-12-17 16:12 in Propeller 1
Hey,

Can I use an IO pin on the Propeller to supply power to an additional 24LC512 eeprom? ( not the boot eeprom)
This way, I can totally switch off power and also prevent glitches from corrupting to the eeprom.
Will the voltage supply be high enough if the Propeller is run on 3.3v?
Is the pull-up transistor inside the Propeller a mosfet or bipolar?

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Comments

  • LeonLeon Posts: 7,620
    edited 2008-12-17 11:57
    It should work.

    Leon

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  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-12-17 12:17
    "Glitches" on the Propeller supply rail will likely be present on the Propeller output, too.
  • LeonLeon Posts: 7,620
    edited 2008-12-17 13:04
    That won't be a problem if the system is designed properly.

    Leon

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Amateur radio callsign: G1HSM
    Suzuki SV1000S motorcycle
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2008-12-17 16:12
    William,

    Be sure your SDA and SCL pullups connect to that pin as well and not to Vdd.

    -Phil

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