Why 32.768 kHz frequency crystal oscillator is used in many RTC watches and Timers ?

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Embedded C

Embedded C

Күн бұрын

32.768kHz is used widely for many watch/RTC/Timer peripheral.
Have you ever wonder why that magic number 32768?
The reason is using 32768Hz aka 32.768kHz frequency for RTC/Timer will give exact 1 Sec delay.
32768 is a 2 power value. Yes, 2 power 15 is 32768. So with 15 stage divider 32.768kHz can be divided to 1Hz.
From that one Hz it is easy to achieve 1 second period.
Why should i use 32.768kHz instead of 1Hz ? 1Hz crystal will give 1 second period withot even dividing then why should i use 32.768kHz?
Size of the crystal and it's frequency is inversely proportional to each other.
So 1Hz crystal will be too big to use in the normal Hardware.
Also 32.768kHz crystal is good in less power consumption.
Frequency suitable for a period of 1 second and Better trade-off between size, frequency and power consumption.
Why 32.768kHz crystal oscillator is used for RTC and Timer peripherals ?
What is the advantage of using 32.768kHz crystal oscillator ?
Why can't I use 1Hz crystal oscillator for RTC ?
Why RTC and Timers use 32.768kHz oscillator always ?
How 32.768kHz consumes less power ?
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Пікірлер: 23
@sivaprakash6068
@sivaprakash6068 5 жыл бұрын
Nice explanation.
@Acoustic-Rabbit-Hole
@Acoustic-Rabbit-Hole 2 жыл бұрын
Middle C on the piano sounds like red (the beginning of the visible rainbow spectrum). The world's great love songs are in C-major. 32,768 hertz, when continually halved, reduces to an lower octave of 256hz: Middle C. Therefore the piezoelectric crystal resonates in red. An extremely high C-note. Music is frequency in time. This would explain why time--at least on the grand piano--begins where the rainbow commences. At least that's what Glenda the Good Witch told Dorthy after cracking a cigarette.
@Chochep
@Chochep 2 ай бұрын
If this component is damaged what will happen?
@christopherr1162
@christopherr1162 5 жыл бұрын
It is helpful and good information.
@blackred5155
@blackred5155 4 жыл бұрын
Very helpful
@luckmoremwakudza6049
@luckmoremwakudza6049 5 жыл бұрын
Thank You
@intensecutn
@intensecutn 2 жыл бұрын
1.25x playback speed for normal speed.
@simonnjoum9776
@simonnjoum9776 Жыл бұрын
Hi everyone i want to sée d iagram of thé 555 and quartz thks
@richardbloemenkamp8532
@richardbloemenkamp8532 3 жыл бұрын
Probably it is also because of history, availability and economy of scale. Even if today we would find a 65536Hz crystal to be more power efficient or to be slightly smaller or slightly more precise, we would probably still stick to 32768.
@Acoustic-Rabbit-Hole
@Acoustic-Rabbit-Hole 2 жыл бұрын
Middle C on the piano sounds like red (the beginning of the visible rainbow spectrum). 32,768 hertz, when continually halved, reduces to an lower octave of 256hz: Middle-C. Therefore the piezoelectric crystal resonates in red. An extremely high C-note. Music is frequency in time. This would explain why time--at least on the grand piano--begins where the rainbow commences.
@5greatstory556
@5greatstory556 3 жыл бұрын
32.768Khz is for Computer Motherboard ???
@nishanthsinceborn
@nishanthsinceborn 4 жыл бұрын
How it is reduced to 1 clock pulse? Please make a video on it.
@duality4y
@duality4y 4 жыл бұрын
flipflops specifically toggle flipflops made out of data flipflops probably even though jk flipflops would work too
@nishanthsinceborn
@nishanthsinceborn 4 жыл бұрын
@@duality4y so whether every quartz watch have flipflop inside?
@Sentinel-1
@Sentinel-1 4 жыл бұрын
@@nishanthsinceborn 15-bit counter
@nishanthsinceborn
@nishanthsinceborn 4 жыл бұрын
@@Sentinel-1 thank u dud💓
@shyagalingaswamy4315
@shyagalingaswamy4315 5 жыл бұрын
If my frequency is 32.770 means what happen
@alicomando1195
@alicomando1195 2 жыл бұрын
How Can I Lower The Frequency From 32768 kHz to 24500 kHz? I Wanna Create And Measure Martian Time Which Is 24 Hours 39 Minutes Thanks
@hamsandwich780
@hamsandwich780 2 ай бұрын
Its recording seconds, not hours or minutes, so you would just measure the number of seconds in a martian day
@gonebamboo4116
@gonebamboo4116 5 жыл бұрын
All that screen and such tiny little characters
@pow9606
@pow9606 3 жыл бұрын
What I want to know is why there are so many videos that explain what one is and why to use one. No one can show a simple example of using one. Hell, I can't even find a video that mentions what the two pins are. ground and vcc?
@hamsandwich780
@hamsandwich780 2 ай бұрын
ground - electrical ground, vcc - voltage source, sda - serial data, scl - serial clock - you want to just look at circuit diagrams because its basically how you would wire a lightbulb (twice)
@binumonk5238
@binumonk5238 5 жыл бұрын
3.27680 and 32.7680 are same
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