firmware
I²C / SPI Timing
I²C rise time, pull-up validation, cable length. SPI clock, bit/byte periods — timing diagram SVG.
I²C Inputs
Results
Rise Time t_r—
Spec Limit1 µs
R_pull max (for C_bus)—
R_pull min (~3 mA @ 3.3 V)1.1 kΩ
Max Cable Length (100 pF/m)—
t_r = 0.8473 × R × C · L_max ≈ (C_lim − C_bus) / 100 pF/m
Timing Diagram