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STM32F7 PWM Calculator

Quickly compute the PSC, ARR, and CCR values for STM32F7 timers and generate accurate PWM signals without trial and error. Simply select your timer, enter the APB clock, desired PWM frequency, and duty cycle — the calculator instantly provides optimized values along with a ready-to-use configuration for STM32CubeIDE or CubeMX.

This tool is specifically designed for the STM32F7 series, where higher clock speeds and advanced timers allow for greater precision. Note that timer availability, APB bus assignments, and clock configurations may differ across other STM32 families.

Configuration
Register values
PSC
ARR
CCR / Pulse
Timer clock
Actual freq
Freq error
DC resolution
Timer details
Formulas
Timer clk = APB × multiplier
PSC = ⌊Tclk / (F × (ARR+1))⌋ − 1
Maximise ARR → best resolution
CCR = round(ARR × Duty / 100)
F_actual = Tclk / ((PSC+1)×(ARR+1))
STM32CubeIDE / HAL snippet

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