Low Vcc [1.5Vx2] operating MCU how to…

Discussion in 'Embedded Systems and Microcontrollers' started by oookey, Oct 10, 2014.

  1. oookey

    Thread Starter Member

    May 24, 2010
    62
    0
    Hi all,
    I’m going to do a project using 12F615 & powered by 3V [1.5Vx2 ] batteries, is there a way to program by pickit2, the source code is written in mikroC.

    when i changed the Vdd to 3.0 in the picket2, i got a warning, ref to image below.

    Thanks

    Oookey
    12F615-Spec.jpg 12F615-Spec.jpg 3vProgram.jpg
     
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    I think you should using +5v for the picket2, because the warning shown that the erase operation needs 4.5V, it's more then two new about 3.2V batteries, when you complete the programming, then the power source for 12F615 can be using 2.0V to 5.5V.
     
  3. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    You're looking at the wrong doc: try DS41284, Flash Memory Programming Specification. TABLE 7-1 will show you Bulk erase ONLY needs 4.5-5.5V on Vdd to work, all other functions work down to 2V.

    Just keep the batteries out of the device when programming and let the PICkit provide 4.5 to 5.5 V to power the chip. Do insure this is not too great for any other chips connected to the same power rail.
     
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