Use this embedded-systems calculation to configure or check a timer, serial bus, ADC, PWM, buffer, power mode, flash budget, or watchdog from known clock and device parameters.

Code

Required integer input.

Resolution Bits (bits)

Required integer input.

Reference Volts (V)

Required number input.

Ideal unipolar endpoint-inclusive ADC code-to-voltage conversion, where the maximum code maps to Vref. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Input Volts (V)

The resulting input volts returned as a number.

• Register widths, clock trees, prescalers, oscillator tolerance, interrupt latency, peripheral modes, voltage references, quantization, sleep states, endurance conditions, and silicon errata are device-specific.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm equations against the exact datasheet and reference manual, derive register values with integer rounding visible, and verify timing or voltage on hardware.

• Brown Out Threshold Check

  Compare present supply voltage with a selected brown-out threshold; hysteresis and reset timing are device-specific.

• PWM Duty Count

  Nearest PWM active-tick count for a target duty fraction over an inclusive zero-to-period-register timer cycle.

• PWM Frequency

  Edge-aligned PWM frequency with an inclusive auto-reload value and effective prescaler divisor. On timers whose PSC register divides by PSC+1, enter PSC+1.