Calculadora de Frecuencia de Reloj Gratis
Calcula la frecuencia de reloj y período de señal para diseño de sistemas digitales.
CPI: 1 for ARM Cortex-M, 4 for classic AVR
Clock Period
62.50 ns
Clock Period vs Clock Frequency
Fórmula
## Clock Frequency and Timer Calculations The clock frequency determines the speed of all operations in a microcontroller. ### Formulas **Clock Period = 1 / Frequency** **MIPS = Clock Frequency / Cycles per Instruction** **Timer Frequency = Clock / Prescaler** Prescalers divide the clock to create slower timer ticks, useful for generating precise time intervals without consuming CPU cycles.
Ejemplo Resuelto
16 MHz clock, 1 CPI (ARM Cortex-M), prescaler of 64.
- 01Clock period: 1 / 16e6 = 62.5 ns
- 02MIPS: 16e6 / 1 = 16 MIPS
- 03Timer frequency: 16e6 / 64 = 250,000 Hz
- 04Timer tick: 64 / 16e6 = 4.000 microseconds
Preguntas Frecuentes
Does higher clock speed always mean faster execution?
Not necessarily. Pipeline stalls, memory wait states, and bus bottlenecks can reduce effective throughput.
What prescaler should I use?
Choose the prescaler that gives timer resolution suitable for your application while fitting the desired period within the counter range.
Why does my microcontroller run slower than the crystal?
Check for prescaler settings, PLL configuration, and wait states. Some MCUs divide the oscillator internally by default.
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