microcontroller Generate a reset signal from a falling edge trigger


Posted on Feb 6, 2014

Microcontroller design where the mcu is placed in hibernation mode, and can only be awoken by a pulse(high-low-high) signal on the reset pin. (active low) As a wake-up source i`m using an accelerometer or an external RTC. The idea is to have the accelerometer trigger an interrupt, that drives an interrupt pin low. The same goes fo


microcontroller Generate a reset signal from a falling edge trigger
Click here to download the full size of the above Circuit.

r the RTC. It will pull an interrupt pin to logic low signal. However, this won`t wake the mcu from hibernation mode. I need to use this sleep-mode to save as much power as possible. I`m wondering how I can create a toggle signal from the interrupt-pin signal form the wakeup sources. The toggle must only happen once, since its the reset-pin of the mcu. Is there any kind of latches of logic circuits/components that create this kind of signal Edit2: The interrupt signals from both accelerometer and RTC stays low until reset by mcu. Usually this is done by reading a register in the peripheral unit. And for this to happen the mcu must be awake.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Simple Telephone Ring Tone Generator Circuit schematic with explanation
    Serial communication between AVR-006 & computer
    The single-phase sine wave frequency conversion stabilized voltage supply is designed and made
    TS555 Timer
    Hall Effect Sensor Circuit
    V3.0 MS Build With Pics
    Simple current limiting circuit
    TDA2030 8w Amplifier



    Top