pull up resistor for 3.3V I2C system | Cypress Semiconductor
pull up resistor for 3.3V I2C system
My I2C communications need to be pulled up to 3.3V, but I don't know what size pull up resistor I should be using. I've read other forum posts that suggest 2.7k ohm or 4.7k ohm, but that only seem to allow the high to be at 3.3V and the low to be at 3.0V. Is that normal? I'm using a CY8C27443 PSoC1 and the bus capacitance is 30pF if that helps at all.
If I could get an answer ASAP it would be greatly appreciated.