Description
Count one start bit, 5-9 data bits, 0-1 parity bits, and stopHalfBits in {2, 3, 4}.
UART frames combine a start bit, data, optional parity, and stop duration. Baud rate and framing choices jointly determine time and overhead, while polarity and parity correctness are separate checks.
Count one start bit, 5-9 data bits, 0-1 parity bits, and stopHalfBits in {2, 3, 4}.
When to use this tool
Use Uart Stop Bit Half Slot Budget when you need one UART timing, framing, or field calculation.
How to use the tool and how it works
- Enter dataBits, parityBits, stopHalfBits. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read frameHalfBits, stopShare. Use the output convention below.
Count one start bit, 5-9 data bits, 0-1 parity bits, and stopHalfBits in {2, 3, 4}. Return total half-bits and the stop portion divided by that total.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| dataBits | Data Bits | Required. Safe integer; minimum 5; maximum 9. |
| parityBits | Parity Bits | Required. Safe integer; minimum 0; maximum 1. |
| stopHalfBits | Stop Half Bits | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| frameHalfBits | Frame Half Bits | Required. Safe integer. |
| stopShare | Stop Share | Required. Finite number. |
{
"input": {
"dataBits": 8,
"parityBits": 0,
"stopHalfBits": 2
},
"output": {
"frameHalfBits": 20,
"stopShare": 0.1
}
}Limitations and assumptions
- This describes a supplied frame format; hardware support and effective data throughput are not checked.
- 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
Confirm the device's supported frame format and clock budget, then inspect a measured serial waveform where needed.
References
Similar or alternative tools
- Uart Parity Frame Bit Contribution
Add one start bit, dataBits, optional parity, and stopBits in {1, 1.5, 2} for frameBits.
- Uart Stopbit Half Bit Duration
Accept halfBits from 1 through 4 and divide by 2 × positive bitRate for seconds.