The accuracy of the clock will determine the accuracy of the generated waveform. The clock’s speed will determine the maximum frequencies that can be generated for the analog signal. Waveform GenerationĪs for data sampling, the microcontroller clock signal will govern the conversion rate of any digital-to-analog operations. With a 1% constant offset of the clock source, your sample’s timestamp will be out by over 14 minutes every day. In that case, it doesn’t take long before a one percent error in the clock’s frequency (not uncommon with internal oscillators) removes any correlation between your sample’s timestamp and the time shown on your wall clock. Suppose you are recording a sample twice a second with a timestamp. The clock’s speed will determine the maximum rate at which the analog signal can be sampled the clock’s accuracy will determine the sampling rate’s accuracy. The microcontroller clock signal will govern the conversion rate of any analog-to-digital operations. Any significant error in clock speed will have unpredictable consequences for internal microcontroller operations. If the clock runs too fast, there may not be enough time to complete the required operations before the next set begins-the processor interfaces with a range of different component blocks, from dynamic memory to interface pins. If the clock runs too slow, the processing takes longer. The microcontroller’s central processor can be thought of as a synchronized chain of logic blocks that perform a specific function. Why the clock source matters What is Clock in Microcontroller Processing? Two considerations need to be taken into account: the clock’s speed, which determines how fast things happen, and the clock’s accuracy, which determines the consistency of the period between each clock tick and how the clock speed can change over time. But how important is the clock source? Does it matter how accurate it is? The short answer is that it depends… it depends on what the microcontroller is doing and its interfaces. The clock determines how fast the processor executes its instructions, so it is fundamental to performance. The processor, the bus, and peripherals all use the clock to synchronize their operations. Microcontrollers are reliant on their clock source.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |