Quick Answer
Calculate SWD Transfer Time Calculator for Bandwidth-Limited JTAG/SWD Debug Probes
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Find Engineering Solutions →Result Interpretation
SWD Transfer Time Calculator for Bandwidth-Limited JTAG/SWD Debug Probes calculator computes Total SWD transfer time in s using the defined engineering formula and the input values provided. Total SWD transfer time is expressed in s. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Number of data bits to transfer = 8
- Maximum SWD clock frequency = 1000000
- Protocol overhead ratio (e.g., ACK, turnaround, idle) = 0.2
- Clock-to-bit efficiency factor (accounting for non-ideal duty cycle and setup/hold) = 0.85
Expected Result:
- Total SWD transfer time = 1.1294117647059E-5
Engineering Interpretation:
Under the given input conditions, the calculated result is: Total SWD transfer time = 1.1294117647059E-5 s.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
total swd transfer time = (number of data bits to transfer * (1.0 + e.g., ACK, turnaround, idle)) / (maximum swd clock frequency * accounting for non-ideal duty cycle and setup/hold)Formula family: formula_embedded_jtagswd_debug_probe_bandwidth_limited_swd_transfer_time_calculator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| num_bits | Number of data bits to transfer | INPUT | Number of data bits to transfer |
| swd_clock_freq_hz | Maximum SWD clock frequency | INPUT | Maximum SWD clock frequency |
| overhead_ratio | Protocol overhead ratio (e.g., ACK, turnaround, idle) | INPUT | Protocol overhead ratio (e.g., ACK, turnaround, idle) |
| efficiency_factor | Clock-to-bit efficiency factor (accounting for non-ideal duty cycle and setup/hold) | INPUT | Clock-to-bit efficiency factor (accounting for non-ideal duty cycle and setup/hold) |
| transfer_time | Total SWD transfer time | OUTPUT | Total SWD transfer time |
Calculation Steps
- Enter the number of data bits to transfer in 1.
- Enter the maximum swd clock frequency in Hz.
- Enter the protocol overhead ratio (e.g., ack, turnaround, idle) in 1.
- Enter the clock-to-bit efficiency factor (accounting for non-ideal duty cycle and setup/hold) in 1.
- Step 1: Compute total swd transfer time.
- Read the total swd transfer time (s) from the results.
Engineering Summary
Calculate SWD Transfer Time Calculator for Bandwidth-Limited JTAG/SWD Debug Probes
Frequently Asked Questions
What does this calculator calculate?
The SWD Transfer Time Calculator for Bandwidth-Limited JTAG/SWD Debug Probes calculator estimates Total SWD transfer time based on the input parameters you provide
Why is maximum swd clock frequency important in this calculation?
maximum swd clock frequency is inversely proportional to total swd transfer time. When you enter maximum swd clock frequency in Hz, the calculator uses it in the engineering formula to compute the output
How should I interpret the result total swd transfer time?
The calculator outputs total swd transfer time in s. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Maximum SWD clock frequency (Hz). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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