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.

Active Milliamperes (mA)

Required number input.

Active Seconds (s)

Required number input.

Sleep Milliamperes (mA)

Required number input.

Sleep Seconds (s)

Required number input.

Time-weighted average current of one active/sleep cycle; peripheral leakage outside these measured currents is not inferred. 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]

Average Milliamperes (mA)

The resulting average milliamperes 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.

• I2C Bitrate

  Observed I²C SCL bit rate from measured high and low periods of one complete clock pulse.

• PWM Duty Count

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

• Timer Overflow Period

  Overflow interval for a free-running N-bit timer with a zero-based counter. Prescaler is the effective clock divisor, not necessarily the raw register value.