Why rtc 32.768

I had been using And I wonder why this particular value? If we connected the XTAL to a counter with output in binary D15 to D0, then we simply have to monitor the pin D15 and when that pin goes high, we have 1Sec complete. If we use micro controller for RTC function, then it really does not matter if we have a Thats because, we will anyway compare the entire number and not just 1 bit. Is it something to do with manufacturing constraint? RE: Why Indeed, this is my understanding. I believe a lot of RTC chips rely on that exact division to stop errors creeping in.

As to the speed. Generally, it is taken that the faster something oscillates, the more accurate it is. New Member. It's mostly because This answer provides more detail, here's an excerpt: There are 1. Community Bot 1. Adam Davis Adam Davis Should MIDI have gone for I don't think there was any reason to use a When MIDI was introduced, it was common for computers to use a clock derived from either a multiple of 1.

Divide the former by 2 and then 16 to get precisely. Divide the latter by 7 and then 16 to get Hz, which is about 2. The Hz rate is probably the best one if systems will need to be able to derive it from a multiple of either 1. Add a comment. L Brielmaier L Brielmaier 21 1 1 bronze badge. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. Now live: A fully responsive profile. Linked The frequency of a real time clock varies with the application.

The frequency Hz And, you can get a precise 1 second period 1 Hz frequency by using a 15 stage binary counter. Practically, in majority of the applications, particularly digital, the current consumption has to be as low as possible to preserve battery life.

So, this frequency is selected as a best compromise between low frequency and convenient manufacture with market availability and real estate in term of physical dimensions while designing board, where low frequency generally means the quartz is physically bigger.

The number is a power of 2, i. If you have a I love mechanical timepieces, they are truly the most amazing machines in terms of raw precision and reliability.

DS is an SPI version. Why are real-time clocks always Using Arduino General Electronics. It is easy to divide that frequency using a binary counter to get 1 second pulses. Or even 8,?

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