Description
Return divisor minus one as registerValue.
Timer formulas depend on whether endpoints are inclusive, the count direction, prescaling, and wrap behavior. A counter reading alone cannot reveal an arbitrary number of elapsed wraps.
Return divisor minus one as registerValue.
When to use this tool
Use Microcontroller: Timer Prescaler Register Minus One when you need a timer period, wrap delta, or explicit count-budget term.
How to use the tool and how it works
- Enter prescalerDivisor, registerBits. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read result. Expand result to inspect the returned fields.
Require registerBits from 1 through 32 and prescalerDivisor from one through 2^registerBits. Return divisor minus one as registerValue.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| prescalerDivisor | Prescaler Divisor | Required. Safe integer. |
| registerBits | Register Bits | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| result | Result | Required. Object. |
| result.registerValue | Register Value | Calculated result member: number. |
{
"input": {
"prescalerDivisor": 16,
"registerBits": 8
},
"output": {
"result": {
"registerValue": 15
}
}
}Limitations and assumptions
- This assumes a minus-one register encoding; actual register layout and device support must be checked independently.
- Outputs are nested inside result. Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Check the timer mode and register semantics in the device documentation, including synchronization and latency.
References
Similar or alternative tools
- Timer Prescale Resolution
Divide positive prescaler by clockHertz for tickSeconds and multiply by nonnegative tickCount for durationSeconds.
- Timer Prescaler Counter Bit Budget
Floor inputTicks / prescaler for counterTicks.