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Is it possible to synchronize execution between 2 microcontrollers?
If you mean clock-cycles, then probably not. There are a number of ways to do this, depending on how custom you’d want to make the system, and how precise you need it to run. You’re on the right track with the timestamps being sent back and forth though.
Which is the best way to synchronize a clock?
There are several methods for synchronizing physical clocks. External synchronization means that all computers in the system are synchronized with an external source of time (e.g., a UTC signal).
How does a crystal work in a Maxim RTC?
Since the crystal inputs of Maxim RTCs have very high impedance (about 10 9 Ω), the leads to the crystal act like very good antenna, coupling high-frequency signals from the rest of the system. If a signal is coupled onto the crystal pins, it can either cancel out or add pulses.
How are crystals used in parallel resonance mode?
Crystals used in parallel-resonance mode are specified for a certain frequency with a specific load capacitance. For the oscillator to run at the correct frequency, the oscillator circuit must load the crystal with the correct capacitive load. Figure 1.
How many times does a microcontroller count in one second?
That means, in one second (where the microcontroller ticks one million times) the counter would only count up to 15,625. you could see that if the counter counts up to that number, then you would be able to blink an LED every second. Mainly, timers have a register for control, and a register that holds the count number.
Is there a limit to the synchronization of systems?
So, there is a limit to how precisely you can make the systems “sync”. Network Time Protocol (NTP) does have some pretty clever algorithms for setting/syncing the time between multiple systems, which allows several systems to have the same idea of “time”. But bear in mind that again, there is a limit to “sameness”.
What are the numbers that AVR microcontrollers allow?
The AVR microcontrollers allow prescaling (skipping) numbers of: 8, 64, 256 and 1024. That is, if 64 is set as the prescaler, then the counter will only count every time the clock ticks 64 times.
What makes one processor run faster than the other?
Superscalar execution units, asynchronous interrupts, asynchronous (ish) memory controllers, caches, content of caches, all conspire to make one processor run just a little faster or slower than the other. So, there is a limit to how precisely you can make the systems “sync”.
Can a microcontroller be clocked by a HSE?
Microcontroller STM32F446RE can be clocked by HSE (High-speed External oscillator) that is marked by num.3. In this case the user can connect his own crystal. In the default state crystal is not provided. There is necessary abides minimum and maximum range of frequency: the minimal frequency is 4 MHz and maximal frequency is 26 MHz crystal.