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  1. Took me too long to edit the previous post, I got...

    Took me too long to edit the previous post, I got locked!

    I have downloaded the XLP LowPower App note from microchip and it is helpful. The 14K50 does not allows for deep sleep, but regular sleep...
  2. That would be pretty good! I will have a look at...

    That would be pretty good! I will have a look at how you managed to get that and will let you know. Thanks for the help!
  3. Design is completed and can't be changed, beside...

    Design is completed and can't be changed, beside there's no available I/O pin left.

    IDLE power consumption is actually from the PIC and not from the peripherals.
  4. The logger project is getting near completion! I...

    The logger project is getting near completion! I am now into the autonomous mode power, and I was able to measure these figures while powering the device from a battery across a 10 ohm shunt.
    ...
  5. I realized that I have a very strange problem...

    I realized that I have a very strange problem when I write to my I2C EEPROM when the CPU is clocked at 32.768kHz, I get corrupted data if there's a long chain of "0" being sent.

    I record my...
  6. Yes but I commented all others as well. I just...

    Yes but I commented all others as well. I just quoted the lines that caused the interrupt to stop working.

    I want to disable the primary oscillator, because I have 2 operating modes:

    1) USB...
  7. Tried this step by step. Commenting either or...

    Tried this step by step.

    Commenting either or all of these:



    OSCCON.1 = 0
    OSCCON.0 = 1 'Use Timer1 oscillator as clock source
    OSCCON.7 = 1 'Device enters in IDLE mode when sleep...
  8. Hmm I don't really understand, I have this at the...

    Hmm I don't really understand, I have this at the beginning of my code during initialization:


    T1CON = %01101011 'Set Timer prescaler to /4 and enable Timer1 on external 32768Hz crystal
    ...
  9. Back with more news, I made some great progress...

    Back with more news, I made some great progress with the programming!

    I am trying to implement the low power mode, however I find microchip datasheet to be a bit confusing. I switch from a 48Mhz...
  10. It was time to pack things down, I must say that...

    It was time to pack things down, I must say that it is not easy to drill vias using a 0.3mm drillbit and sticking a tiny copper wire in it to make the connexion!
    ...
  11. Yep will do! I have setup the secondary...

    Yep will do!
    I have setup the secondary oscillator with a 32k XTal. That way it will give me the time accuracy I need and I can clock the CPU using that source. I have yet to finish the main routine...
  12. I could not get the CDC demo to run on my 18F4550...

    I could not get the CDC demo to run on my 18F4550 board, (though, 3 years ago it was running fine... but since then I changed PBP, MCS and PMLAB versions...). I preferred to carry on the actual...
  13. Back on the PIC, dissecting the datasheet, this...

    Back on the PIC, dissecting the datasheet, this is what I have for the LF13K50

    Sleep mode: 24 nA
    Watchdog Timer: 450 nA
    Timer1 Oscillator: 790 nA @ 32 kHz

    So using the watchdog timer to...
  14. Cool! I missed this thread, I'll dissect it...

    Cool! I missed this thread, I'll dissect it carefully, looks pretty much like all I want!
  15. 18F13K50/14K50 clocking

    Trying to get the USB com. working.
    Now there's a little details that I have seen stated but not previously understood:

    The 18F13K50/14K50 requires the use of an external crystal of 12 or 48 Mhz...
  16. Hi Bob! thanks for your observations! Indeed,...

    Hi Bob! thanks for your observations!

    Indeed, 1mA is waaaay too much!!!

    I am giving the quiescent current because this is what is consumed most of the time. The component will be turned on when...
  17. PIC18F13K50, CDC USB communication and ultra-low power temperature logger

    Dear everyone!

    I am in the process of starting a new project around the 18F13K50, which have to mix ultra-low power and USB communication, a combination that seems to be difficult to mix.

    I had...
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