- #1
likephysics
- 636
- 2
In any signal line that's oscillating, how does the pull up resistor value affect the signal frequency.
According to I2C specs, The pullup res and the device capacitance limit the rise time of the signal, thus limiting the max frequency.
But when I simulated, I didn't see any change in frequency when I varied the value of R.
In the circuit attached, V1 is the oscillating source(1MHz), R is tied to V2(3.3V)
According to I2C specs, The pullup res and the device capacitance limit the rise time of the signal, thus limiting the max frequency.
But when I simulated, I didn't see any change in frequency when I varied the value of R.
In the circuit attached, V1 is the oscillating source(1MHz), R is tied to V2(3.3V)